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lig-kits [2018/11/27 13:11]
5.188.211.13 wgEMHU <a href="http://lovccunqeltd.com/">lovccunqeltd</a>, [url=http://rtdmhiuduwvx.com/]rtdmhiuduwvx[/url], [link=http://kebltcgwayyi.com/]kebltcgwayyi[/link], http://dbqvmpjashbk.com/
lig-kits [2021/02/07 11:32] (current)
admin
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-{{INLINETOC:width18 2-5}}+
  
 ===== The LARC Kit Builders Interest Group - updated 2018-09-12 ===== ===== The LARC Kit Builders Interest Group - updated 2018-09-12 =====
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 The inaugural meeting was on January 13, 2018, and more information on this and other meetings is available in the Meeting History section of this page. The inaugural meeting was on January 13, 2018, and more information on this and other meetings is available in the Meeting History section of this page.
 +
 +===== Using Microprocessors (Arduinos, etc) in Ham Gear =====
 +
 +Microprocessors seem to be inside everything nowadays, and ham gear is no different. There are lots of kits available for devices that are useful in ham radio that are make use of a microprocessor in one way or another to do some pretty clever things. We'd like to invite people who are interested in using, or learning about microprocessors to join the kit builders and share your experiences and successes. We expect that our efforts will be centered around the Arduino family of processors which have a lot of support available, but if you have a kit that uses another microprocessor, you're most welcome to bring it in and show off your work.
 +
 +What can you expect from our microprocessor kit builder group?
 +
 +  * moral support, especially when you hit a roadblock
 +  * assistance with troubleshooting an uncooperative kit
 +  * access to some test tools provided by LARC (various scopes, analysers and meters, etc)
 +  * help getting software loaded into your device
 +  * assistance with modifying software to meet your specific needs
 +  * pointers on designing your own "kit" for something you want to do
 +
 +What should you not expect from the group?
 +
 +  * having someone build your kit for you, but we'll help you do it
 +  * having someone write software for you, but we'll help
 +  * being taught basic programming, but we'll gladly give training material pointers
 +  * free kits or parts, but we might have some parts available.
 +
 +What microprocessor projects are currently under way?
 +
 +  * Devon Elliott is building an automated keyer with a ton of features in the software
 +  * Dave McCarter is investigating using an Arduino controlled Si5351 frequency generator as the basis of a ham radio tuner
 +  * Doug Elliott is working on the QRP Guys K2ZIA/W8TEE antenna analyser, and a robot with WiFi telemetry
 +  * (your project here - just let Doug know)
 +
 +Sound interesting? for more information you can show up at the Wing at 7:30 on a Wednesday, or contact Doug Elliott ([[canoe.eh@gmail.com?subject=Microprocessor Kit Builders|]])
  
 ===== Kit Builder Resources ===== ===== Kit Builder Resources =====
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-<code> +==== Sources for tools and test gear ====
-  \ +
- ==== Sources for tools and test gear ==== +
-</code>+
  
 ( to be added - contributions welcome ) ( to be added - contributions welcome )
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 +<code>
 ==== Websites with tutorials, training modules, educational information ==== ==== Websites with tutorials, training modules, educational information ====
 +</code>
  
 |<font inherit/inherit;;#c0392b;;inherit>Topic</font>|<font inherit/inherit;;#c0392b;;inherit>Info</font>| |<font inherit/inherit;;#c0392b;;inherit>Topic</font>|<font inherit/inherit;;#c0392b;;inherit>Info</font>|
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 -GYQ had a very full life. He was a busy doctor (occasionally sewing orange peels back together for practice, and had received commendations from NASA. -GYQ had a very full life. He was a busy doctor (occasionally sewing orange peels back together for practice, and had received commendations from NASA.
  
--Mike seems to have inherited some of his dads traits, and built and installed his own Yagi for internet access at the family hobby farm near Embro when the ExploreNet installer said it couldn't be done.\\+-Mike seems to have inherited some of his dads traits, and built and installed his own Yagi for internet access at the family hobby farm near Embro when the ExploreNet installer said it couldn't be done. \\
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 -followup email from Dave McCarter: -followup email from Dave McCarter:
  
-Today a few of us met at the wing to discuss kits to build.\\ +Today a few of us met at the wing to discuss kits to build. \\ 
-Doug has ordered three boards from QRPguys.com for the antenna analyzer, and will now be doing parts sourcing.\\ +Doug has ordered three boards from QRPguys.com for the antenna analyzer, and will now be doing parts sourcing. \\ 
-Phil is still in need of a 1590XX enclosure for his kit.\\ +Phil is still in need of a 1590XX enclosure for his kit. \\ 
-I received the Frequency Reference Kit, a Regenerative Receiver Kit, and a Digital Dial/Counter Kit from QRPguys.\\ +I received the Frequency Reference Kit, a Regenerative Receiver Kit, and a Digital Dial/Counter Kit from QRPguys. \\  \\ 
-\\ +I reviewed my discussion about the Lidia Receiver, and then discussed Alan Worton's article in this month's TCA about the QRPLabs 5W kit \\ 
-I reviewed my discussion about the Lidia Receiver, and then discussed Alan Worton's article in this month's TCA about the QRPLabs 5W kit\\ +called the QCX. Phil and Tom already have this kit and their build is well along. \\  \\ 
-called the QCX. Phil and Tom already have this kit and their build is well along.\\ +After reading about the type of RF mixer, opposite sideband suppression, and local oscillator generation, (a CPU controlled Direct \\ 
-\\ +Digital Synthesiser which is very precise and stable) I'm convinced this is the biggest bang for the buck kit available. The kit is sold \\ 
-After reading about the type of RF mixer, opposite sideband suppression, and local oscillator generation, (a CPU controlled Direct\\ +for $49 USD, about $75 CDN. The Lidia receiver only was going to be in the $50 range, so there is a lot of functionallity, including full \\ 
-Digital Synthesiser which is very precise and stable) I'm convinced this is the biggest bang for the buck kit available. The kit is sold\\ +QSK CW transmitter, for the extra money. \\  \\ 
-for $49 USD, about $75 CDN. The Lidia receiver only was going to be in the $50 range, so there is a lot of functionallity, including full\\ +Phil is building his for 30m, and I don't recall which band Tom is building for. I am going to also go for 30m, as that is a great QRP CW band. \\  \\ 
-QSK CW transmitter, for the extra money.\\ +I wonder how many of you would like to join us on this journey. Do let me know as quickly as possible. \\  \\ 
-\\ +Also, after all this, if you do want to continue with a Lidia Receiver, please do let me know, and for which band. \\
-Phil is building his for 30m, and I don't recall which band Tom is building for. I am going to also go for 30m, as that is a great QRP CW band.\\ +
-\\ +
-I wonder how many of you would like to join us on this journey. Do let me know as quickly as possible.\\ +
-\\ +
-Also, after all this, if you do want to continue with a Lidia Receiver, please do let me know, and for which band.\\+
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 -Barry's Nixie tube clock has black marking on PCB -Barry's Nixie tube clock has black marking on PCB
  
--flux on a PCB compromises insulation\\ +-flux on a PCB compromises insulation \\ 
--best to us isopropyl alcohol, and scrub with toothbrush, multiple times\\+-best to us isopropyl alcohol, and scrub with toothbrush, multiple times \\
 -good flux removers: isopropyl and ethyl alcohol -good flux removers: isopropyl and ethyl alcohol
  
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 -magnets dropped onto a copper plate decelerate as current / magnetic field is induced -magnets dropped onto a copper plate decelerate as current / magnetic field is induced
  
--Barry's antenna challenges:\\ +-Barry's antenna challenges: \\ 
--991 wouldn't tune, but 890 would\\ +-991 wouldn't tune, but 890 would \\ 
--991 worked well at field day\\ +-991 worked well at field day \\ 
--antenna at home has wrong length pipe\\ +-antenna at home has wrong length pipe \\ 
-- 7/8 * 3 feet scrounged from GSO\\ +- 7/8 * 3 feet scrounged from GSO \\ 
-- found loose BNC connector\\+- found loose BNC connector \\
 - antenna meter giving strange results - antenna meter giving strange results
  
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 -VOA (Voice of America) museum nean Cincinati is worth a visit -VOA (Voice of America) museum nean Cincinati is worth a visit
  
--better to spot weld batteries when making packs, that solder. You can easily build a suitable spot welder\\+-better to spot weld batteries when making packs, that solder. You can easily build a suitable spot welder \\
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 ==== May 26, 2018 ==== ==== May 26, 2018 ====
  
--balloon tracker (Byonix) analysis\\ +-balloon tracker (Byonix) analysis \\ 
--payload needs to breathe\\ +-payload needs to breathe \\ 
--board wasn't conformally coated - vulnerble to moisture\\ +-board wasn't conformally coated - vulnerble to moisture \\ 
--bees wax as a connector sealer\\+-bees wax as a connector sealer \\
 -one way valve (like on coffee packages) to release pressure -one way valve (like on coffee packages) to release pressure
  
--future projects\\+-future projects \\
 -mobile helical antennas for 144.39 -mobile helical antennas for 144.39
  
--Dave: work on packet capture, software\\+-Dave: work on packet capture, software \\
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 -ACW;s flat board: through the board transformer, hot/cold side, keep diodes and caps -ACW;s flat board: through the board transformer, hot/cold side, keep diodes and caps
  
--project kits: 1/16, 1/8 W transistors, position to read code\\ +-project kits: 1/16, 1/8 W transistors, position to read code \\ 
--.1uF - 2*C25 C25 above Amp → C28 (electrolytic)\\ +-.1uF - 2*C25 C25 above Amp → C28 (electrolytic) \\ 
--D1 is a safety diode\\ +-D1 is a safety diode \\ 
--winding toroids, binocular xformer, #34 red wire, 2 lengths\\ +-winding toroids, binocular xformer, #34 red wire, 2 lengths \\ 
--wrap clockwise to match pads on PCB\\ +-wrap clockwise to match pads on PCB \\ 
--once through center = 1 turn\\ +-once through center = 1 turn \\ 
--want wire tight to toroid\\ +-want wire tight to toroid \\ 
--avoid kinks and loops\\ +-avoid kinks and loops \\ 
--binocular: fold wire in half, one for each hole\\+-binocular: fold wire in half, one for each hole \\
 - 8 * #34 (red) , 2 * #30 - 8 * #34 (red) , 2 * #30
  
--using aspirin to remove coating from wire\\ +-using aspirin to remove coating from wire \\ 
--lots of light, magnification. easier to read resistors in bright light\\ +-lots of light, magnification. easier to read resistors in bright light \\ 
--finding enamled wire in different colours is nice\\+-finding enamled wire in different colours is nice \\
 -wire wrap wire is good too - use exacto knife to strip -wire wrap wire is good too - use exacto knife to strip
  
--GSO: GreenLee punches (will do 16 and 16 gauge steel) available\\+-GSO: GreenLee punches (will do 16 and 16 gauge steel) available \\
 -Doug has a metal nibbler -Doug has a metal nibbler
  
--AL: 49:1 balum for end fed wire\\+-AL: 49:1 balum for end fed wire \\
 -trick for counting turns: take a cell phone photo, and blow it up -trick for counting turns: take a cell phone photo, and blow it up
  
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 -Ferric Chloride acid is available at Electronic Supply on Nightengale. -Ferric Chloride acid is available at Electronic Supply on Nightengale.
  
--WARNING: Amonium Perchlorate is very volatile.\\ +-WARNING: Amonium Perchlorate is very volatile. \\  \\
-\\+
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 -Potential fixes for unhappy Astron PS: solder joints, 85 degree caps, crimped wire connections are loose -Potential fixes for unhappy Astron PS: solder joints, 85 degree caps, crimped wire connections are loose
  
-\\+ \\
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 -new guys working on their licenses: -new guys working on their licenses:
  
-Philip Jones (dad), pjones8@uwo.ca, (now VA3PGJ )\\ +Philip Jones (dad), pjones8@uwo.ca, (now VA3PGJ ) \\ 
-Tristan Jones (son) tgbj@icloud.com, (now VA3TGJ )\\+Tristan Jones (son) tgbj@icloud.com, (now VA3TGJ ) \\
 They're writing their exams today They're writing their exams today
  
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 -CHIRP does geo-location to get local repeaters -CHIRP does geo-location to get local repeaters
  
-\\+ \\
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 -Harry showed off his BitX 40m transceiver that came from HFsignals.com in India. XCVR kit @ $75 US$, plus red enclosure @ $35 US$. -Harry showed off his BitX 40m transceiver that came from HFsignals.com in India. XCVR kit @ $75 US$, plus red enclosure @ $35 US$.
  
--Dave was recommending a micro XLR connector (think he called it mini one time too, I may have that wrong) for connecting the microphone, with a switch to disable phantom power when a dynamic mic is being used.\\ +-Dave was recommending a micro XLR connector (think he called it mini one time too, I may have that wrong) for connecting the microphone, with a switch to disable phantom power when a dynamic mic is being used. \\ 
--Harry commented that the volume control was pretty touchy, and DAve recommended a 10 turn 10K pot to improve the control\\+-Harry commented that the volume control was pretty touchy, and DAve recommended a 10 turn 10K pot to improve the control \\
 -this pot has a spiral resistive element, with contact that travels slowly as shaft is turned -this pot has a spiral resistive element, with contact that travels slowly as shaft is turned
  
-Barry's collection of old digital multimeters\\ +Barry's collection of old digital multimeters \\ 
--one with a dead short\\ +-one with a dead short \\ 
--one with old D cells, which have leaked\\+-one with old D cells, which have leaked \\
 -can clean old boards with 50% isopropyl alchol, 50% distilled water, and maybe a drop of soap. use an old toothbrush -can clean old boards with 50% isopropyl alchol, 50% distilled water, and maybe a drop of soap. use an old toothbrush
  
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 Dave: If you want a good worksurface, get a big white cutting board. Easy to see parts, saves your table top Dave: If you want a good worksurface, get a big white cutting board. Easy to see parts, saves your table top
  
-Tom's Tuner\\ +Tom's Tuner \\ 
--wafer switch from Bill McHugh\\ +-wafer switch from Bill McHugh \\ 
--what kind of wire between wafer switch and taps on coil?\\ +-what kind of wire between wafer switch and taps on coil? \\ 
--rule of thump is use same diameter wire as is in the coil - it gets same current\\ +-rule of thump is use same diameter wire as is in the coil - it gets same current \\ 
--in this case, "hookup" or "bus" wire, about 18 AWG, solid or stranded\\ +-in this case, "hookup" or "bus" wire, about 18 AWG, solid or stranded \\ 
--needs 12 conductors - Doug may have some applicable cable from salvage job\\+-needs 12 conductors - Doug may have some applicable cable from salvage job \\
 -discussions on tuner design -discussions on tuner design
  
 Antenna "Aperture" - amount of space occupied, or circumscribed. bigger is better Antenna "Aperture" - amount of space occupied, or circumscribed. bigger is better
  
-Code Practice Oscillator\\+Code Practice Oscillator \\
 -Dave's schematic is on this website now. default resister values are in Ohms, and Caps are microFarads -Dave's schematic is on this website now. default resister values are in Ohms, and Caps are microFarads
  
-Circulator circuit\\ +Circulator circuit \\ 
--shunts returned power to a dummy load in a clever way that Doug didn't understand\\+-shunts returned power to a dummy load in a clever way that Doug didn't understand \\
 -comment that S9 is equivalent to 50 microvolts - pretty small to see with common tools -comment that S9 is equivalent to 50 microvolts - pretty small to see with common tools
  
-N connectors have a lot of merit\\ +N connectors have a lot of merit \\ 
--constant impedance\\ +-constant impedance \\ 
--"Norman" after war, using UHF having 22 Ohm resistance\\ +-"Norman" after war, using UHF having 22 Ohm resistance \\ 
--built water tight\\+-built water tight \\
 -QRP use a different one, a bit like a 9V battery contact -QRP use a different one, a bit like a 9V battery contact
  
 Using thermal heat transfer compound to improve cooling of a resistor Using thermal heat transfer compound to improve cooling of a resistor
  
-Discussion of meaning of BNC:\\ +Discussion of meaning of BNC: \\ 
--Dave: Bayonet Norman Connector\\+-Dave: Bayonet Norman Connector \\
 -Doug: Bayonet Neill Concelman (who invented it). Neill also invented D connector, Concelman invented C connector -Doug: Bayonet Neill Concelman (who invented it). Neill also invented D connector, Concelman invented C connector
  
-Doug's robot is actually balancing, for minutes at a time\\ +Doug's robot is actually balancing, for minutes at a time \\ 
--works a lot better on carpet than on concrete floor in the nerdpit\\+-works a lot better on carpet than on concrete floor in the nerdpit \\
 -work has started on next generation: cad/cam schematic, auto layout, PCB build either on CNC machine or outsourced -work has started on next generation: cad/cam schematic, auto layout, PCB build either on CNC machine or outsourced
  
-Discussion of salvaging gold from surplus electronics\\ +Discussion of salvaging gold from surplus electronics \\ 
--using mercury and cyanide is very dangerous\\ +-using mercury and cyanide is very dangerous \\ 
--hydrochloric acid & hydrogen peroxide to disolve other metals\\ +-hydrochloric acid & hydrogen peroxide to disolve other metals \\ 
--nitric acid and hydrochloric acid disolves the gold\\ +-nitric acid and hydrochloric acid disolves the gold \\ 
--there's also a way to process iron\\ +-there's also a way to process iron \\ 
--sodium…(borax) to get gold\\ +-sodium…(borax) to get gold \\ 
--fine gold wires are used to connect dies to their leads\\+-fine gold wires are used to connect dies to their leads \\
 -10 pentiums ahve about $400 worth of gold in them -10 pentiums ahve about $400 worth of gold in them
  
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 In the meantime, here's a document Dave GSO has supplied: In the meantime, here's a document Dave GSO has supplied:
  
-A nicely designed [[http://nerdpit.ca/ham/cw/Code-Practice-Oscillator.pdf|code practice oscillator]], (updated version as of March 26) like the kit that Phil ordered. If you're thinking of building one, talk to Dave and Doug who can supply some of the parts you'll need.\\+A nicely designed [[http://nerdpit.ca/ham/cw/Code-Practice-Oscillator.pdf|code practice oscillator]], (updated version as of March 26) like the kit that Phil ordered. If you're thinking of building one, talk to Dave and Doug who can supply some of the parts you'll need. \\
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 -someone mentioned a "volt Tattler" kit from QRPKits. Catches hard to see signal voltage pulses and gives a sound alarm. $25 -someone mentioned a "volt Tattler" kit from QRPKits. Catches hard to see signal voltage pulses and gives a sound alarm. $25
  
--for Barry's challenges getting high voltage sources for his Nixie tube supply:\\ +-for Barry's challenges getting high voltage sources for his Nixie tube supply: \\ 
-. -antique radio "B" battery, for tube plates\\ +. -antique radio "B" battery, for tube plates \\ 
-. -"A" battery for filaments\\+. -"A" battery for filaments \\
 . -Dav sketched a circuit that would create higher voltages, using zener diodes where voltages add up . -Dav sketched a circuit that would create higher voltages, using zener diodes where voltages add up
  
--Doug was looking for characteristics of various kinds of caps, and Dave explained:\\ +-Doug was looking for characteristics of various kinds of caps, and Dave explained: \\ 
-. -mylar, mica, NPO cerfamin are very stable\\ +. -mylar, mica, NPO cerfamin are very stable \\ 
-. -electrolytics only come in big values\\ +. -electrolytics only come in big values \\ 
-. -for audio, polycarbonate are best, mylar are bad, ceramic bad due to piezoelectric effect\\+. -for audio, polycarbonate are best, mylar are bad, ceramic bad due to piezoelectric effect \\
 . -metal film resistors are "quiet", carbon composition add some hiss . -metal film resistors are "quiet", carbon composition add some hiss
  
--Barry's old Fluke multimeter stopped working suddenly\\ +-Barry's old Fluke multimeter stopped working suddenly \\ 
-. -early bets were on a cold solder joint\\+. -early bets were on a cold solder joint \\
 . -on exmination, a blown cap ws located - large cap with visible leakage . -on exmination, a blown cap ws located - large cap with visible leakage
  
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 -Phil's keyer from GSO - beautifully refurbished -Phil's keyer from GSO - beautifully refurbished
  
--Doug's power controller link, suggested by Sam from his PS rebuild project:\\ +-Doug's power controller link, suggested by Sam from his PS rebuild project: \\ [[https://rdtech.aliexpress.com/store/group/DPS-Programmble-control-power-supply/923042_508466030.html|https://rdtech.aliexpress.com/store/group/DPS-Programmble-control-power-supply/923042_508466030.html]]
-[[https://rdtech.aliexpress.com/store/group/DPS-Programmble-control-power-supply/923042_508466030.html|https://rdtech.aliexpress.com/store/group/DPS-Programmble-control-power-supply/923042_508466030.html]]+
  
 -DAve WHite is a new ham who is a truck driver. He sleeps in his sleeper cab overnight on some trips, and needs to power a bunch of devices overnight: small fridge, CPAP machine, fan, bunk heater. He can't run the truck overnight in residential neighbourhoods, and is wondering if we could help him come up with an approach using a battery pack of some sort. Doug & Sam are taking up the challenge, and have done all sorts of research. Some details on this web page: [[:truck-batteries|http://nerdpit.ca/doku.php]] Made some incorrect assumptions based on device specifications, and need to make actual measurements of power consumption. Looks like a relatively small lithium battery may be sufficient, along with some small load on the truck's battery. -DAve WHite is a new ham who is a truck driver. He sleeps in his sleeper cab overnight on some trips, and needs to power a bunch of devices overnight: small fridge, CPAP machine, fan, bunk heater. He can't run the truck overnight in residential neighbourhoods, and is wondering if we could help him come up with an approach using a battery pack of some sort. Doug & Sam are taking up the challenge, and have done all sorts of research. Some details on this web page: [[:truck-batteries|http://nerdpit.ca/doku.php]] Made some incorrect assumptions based on device specifications, and need to make actual measurements of power consumption. Looks like a relatively small lithium battery may be sufficient, along with some small load on the truck's battery.
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 (Doug arrived late, so didn't get notes for entire meeting) (Doug arrived late, so didn't get notes for entire meeting)
  
--Barry's Nixie tube driver is giving him problems:\\ +-Barry's Nixie tube driver is giving him problems: \\ 
-. -tiny surface mount parts need a stereo microscope to be able to troubleshoot\\+. -tiny surface mount parts need a stereo microscope to be able to troubleshoot \\
 . -some voltages are really off . -some voltages are really off
  
--Doug: syringes to apply liquid flux are hard to find\\ +-Doug: syringes to apply liquid flux are hard to find \\ 
-. -3 drug stores either didn't have them, or wouldn't sell them (hard to tell)\\+. -3 drug stores either didn't have them, or wouldn't sell them (hard to tell) \\
 . -they suggested a hime improvement store like Home Depot - weird response? . -they suggested a hime improvement store like Home Depot - weird response?
  
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 -battery sources for robots or ham gizmos: model aircraft and cars, lithium batteries from portable tools, etc -battery sources for robots or ham gizmos: model aircraft and cars, lithium batteries from portable tools, etc
  
--Doug's demo & discussion on the stepper motor based robot he's working on:\\ +-Doug's demo & discussion on the stepper motor based robot he's working on: \\ 
-. -reducing subassemblies to one motherboard (MB) with a lot of cables hanging off it\\ +. -reducing subassemblies to one motherboard (MB) with a lot of cables hanging off it \\ 
-. -MB is based on proto board with a fairly useful pattern laid on one side with copper etch\\ +. -MB is based on proto board with a fairly useful pattern laid on one side with copper etch \\ 
-. -a lot of soldered jumper wires and testing\\ +. -a lot of soldered jumper wires and testing \\ 
-. -next version with be cad/cam schematic > board layout > CNC board creation\\+. -next version with be cad/cam schematic > board layout > CNC board creation \\
 . -my buddy's getting a very expensive CNC machine for other purposes. We might farm out initial board production. . -my buddy's getting a very expensive CNC machine for other purposes. We might farm out initial board production.
  
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 -Sam: rebuilding Astron power supply, using nifty programmable control panel -Sam: rebuilding Astron power supply, using nifty programmable control panel
  
--Phil's code oscillator\\ +-Phil's code oscillator \\ 
-. -twin T oscillator R C R C R phase shift network\\ +. -twin T oscillator R C R C R phase shift network \\ 
-. -oscillator runs continuously, no chirp\\ +. -oscillator runs continuously, no chirp \\ 
-. -adjustable pitch and volume\\ +. -adjustable pitch and volume \\ 
-. -capacitor smoothes tone on and off to avoid harsh splatter\\+. -capacitor smoothes tone on and off to avoid harsh splatter \\
 . -from Morse Code Express MX-TCPO . -from Morse Code Express MX-TCPO
  
--Barry: CW key progressing\\ +-Barry: CW key progressing \\ 
-. -brass bolts as contacts\\+. -brass bolts as contacts \\
 . -considering magnets to force centering . -considering magnets to force centering
  
 -Dave GSO distributed shim stock stainless steel pieces for desoldering SMT parts as described last week -Dave GSO distributed shim stock stainless steel pieces for desoldering SMT parts as described last week
  
--SMT soldering:\\ +-SMT soldering: \\ 
-. -flux\\ +. -flux \\ 
-. -blob of solder over everything\\ +. -blob of solder over everything \\ 
-. -use solderbraid to remove most of blob.\\ +. -use solderbraid to remove most of blob. \\ 
-. -solder pste has a short shelf life - 1 month\\+. -solder pste has a short shelf life - 1 month \\
 . -store in ethyl alcohol . -store in ethyl alcohol
  
 -isopropyl alcohol good for removing flux -isopropyl alcohol good for removing flux
  
--liquid flux application\\ +-liquid flux application \\ 
-. -large bore syringe, AKA blunt\\ +. -large bore syringe, AKA blunt \\ 
-. -Q tip\\+. -Q tip \\
 . -fine brushes from Lee Valley . -fine brushes from Lee Valley
  
--Tom's tuner\\ +-Tom's tuner \\ 
-. -recycled meter\\+. -recycled meter \\
 . -large parallel air caps . -large parallel air caps
  
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 ==== Feb 17, 2018 ==== ==== Feb 17, 2018 ====
  
--Tom's tapping a large coil for his tuner. Needed threaded studs to mate with threaded nuts embedded in the porcelain coil form.\\+-Tom's tapping a large coil for his tuner. Needed threaded studs to mate with threaded nuts embedded in the porcelain coil form. \\
 Facca fasteners ( [[http://www.faccafasteners.com|www.faccafasteners.com]]), or Laurie's ( [[http://www.lauriesfasteners.com|www.lauriesfasteners.com]]) are good sources for things like threaded studs Facca fasteners ( [[http://www.faccafasteners.com|www.faccafasteners.com]]), or Laurie's ( [[http://www.lauriesfasteners.com|www.lauriesfasteners.com]]) are good sources for things like threaded studs
  
--Barry's project with large pixie tubes with 11 leads. Trick is to trim leads in a spiral so you can insert them into the socket one at a time\\+-Barry's project with large pixie tubes with 11 leads. Trick is to trim leads in a spiral so you can insert them into the socket one at a time \\
 -he's also working with a control/base board with surface mount (SMT) parts. We shared our condolences. -he's also working with a control/base board with surface mount (SMT) parts. We shared our condolences.
  
 -Tip on removing multi pin SMT parts: use a piece of stainless 2 thou shim stock, which solder won't stick to. Heat the pins one at a time, and slip the shim stock between the part and the board, pushing it ahead for each pin. -Tip on removing multi pin SMT parts: use a piece of stainless 2 thou shim stock, which solder won't stick to. Heat the pins one at a time, and slip the shim stock between the part and the board, pushing it ahead for each pin.
  
--Doug passed around the mother board for his robot project. It now has all sockets and headers, and wiring is barely started.\\ +-Doug passed around the mother board for his robot project. It now has all sockets and headers, and wiring is barely started. \\ 
--Dave examined soldering & said there are only a couple of bad joints (so far)\\ +-Dave examined soldering & said there are only a couple of bad joints (so far) \\ 
--key to good joints is keeping your iron clean and shiny tinned, heating both parts, and putting the solder on the parts, not the iron\\ +-key to good joints is keeping your iron clean and shiny tinned, heating both parts, and putting the solder on the parts, not the iron \\ 
--when you're wiping the iron tip on sponge or brass wool, twirl it for even cleaning action.\\+-when you're wiping the iron tip on sponge or brass wool, twirl it for even cleaning action. \\
 -teflon coated wire wrap wire recommended for jumper work, since the insulation doesn't melt when they're soldered -teflon coated wire wrap wire recommended for jumper work, since the insulation doesn't melt when they're soldered
  
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 -Bill McHugh has offerred access to his bucket of knobs to the kit builders. Bill is generally regarded as an expert in electronic stuff -Bill McHugh has offerred access to his bucket of knobs to the kit builders. Bill is generally regarded as an expert in electronic stuff
  
--Yaesu has announced a replacement for the QRP 817 that runs on batteries\\ +-Yaesu has announced a replacement for the QRP 817 that runs on batteries \\ 
--popular for summit work\\+-popular for summit work \\
 -a pair of 817's is good for satellite work -a pair of 817's is good for satellite work
  
--had a discussion on working satellites & related procedures & antennas\\ +-had a discussion on working satellites & related procedures & antennas \\ 
--satellite operations would make a good LARC presentation\\+-satellite operations would make a good LARC presentation \\
 -it would be great if we could work an ISS QSO into LARC 2020 - might have to rent some students -it would be great if we could work an ISS QSO into LARC 2020 - might have to rent some students
  
--Dave reports 3 London teachers want ham licenses to be able to use APRS for balloon tracking\\+-Dave reports 3 London teachers want ham licenses to be able to use APRS for balloon tracking \\
 -want classes/club to build uprocessor based boards as payload -want classes/club to build uprocessor based boards as payload
  
 -Harry has received his BitX transceiver, but not all of the related bits yet. -Harry has received his BitX transceiver, but not all of the related bits yet.
  
--Doug's note to self: add a section to this page titled "Bits and Pieces We're Looking For"\\ +-Doug's note to self: add a section to this page titled "Bits and Pieces We're Looking For" \\ 
--if you need something, email instructor@larc.ca and I'll put your request where people can see it.\\+-if you need something, email instructor@larc.ca and I'll put your request where people can see it. \\
 -includes components (chips, resistors, diodes, etc, project boxes, cables, connectors…) -includes components (chips, resistors, diodes, etc, project boxes, cables, connectors…)
  
--Dave would like us to actually do construction in these meetings, so bring your iron, your parts bag\\+-Dave would like us to actually do construction in these meetings, so bring your iron, your parts bag \\
 and your instructions to the next meeting. Might want to bring first aid kit, too. and your instructions to the next meeting. Might want to bring first aid kit, too.
  
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 **Post Meeting Notes** **Post Meeting Notes**
  
--The wiki-whacker apologizes for the delay in updating this page, and promises to do better ion the future.\\+-The wiki-whacker apologizes for the delay in updating this page, and promises to do better ion the future. \\
 -we're now up-to-date, as far as I know. -we're now up-to-date, as far as I know.
  
--I've added a section for requests ("Requested Assistance") to see if anyone can help with a part that is needed\\ +-I've added a section for requests ("Requested Assistance") to see if anyone can help with a part that is needed \\ 
--includes components (chips, resistors, diodes, etc, project boxes, cables, connectors…)\\ +-includes components (chips, resistors, diodes, etc, project boxes, cables, connectors…) \\ 
--could include access to test tools, design assistance, etc\\ +-could include access to test tools, design assistance, etc \\ 
--doesn't hurt to ask - worst thing that can happen is that on one responds\\+-doesn't hurt to ask - worst thing that can happen is that on one responds \\
 -forward your request to instructor@larc.ca and I'll get it listed -forward your request to instructor@larc.ca and I'll get it listed
  
--I might add sub-pages for each member of the group in the "Bragging" section.\\ +-I might add sub-pages for each member of the group in the "Bragging" section. \\ 
--it's a place for you to describe your current project.\\ +-it's a place for you to describe your current project. \\ 
--description can range from a single sentence to a full document with diagrams, photos, etc.\\+-description can range from a single sentence to a full document with diagrams, photos, etc. \\
 -don't worry about formatting the info. get it to me any way you can, and I'll include it. -don't worry about formatting the info. get it to me any way you can, and I'll include it.
  
lig-kits.1543342311.txt.gz · Last modified: 2018/11/27 13:11 by 5.188.211.13