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Topic: Share tips you have come across (Read 130361 times) previous topic - next topic

larryd

#300
Mar 08, 2017, 05:20 pm Last Edit: Mar 08, 2017, 05:22 pm by LarryD
@westfw

Actually I was trying to save on image attachments there.

The surfaces I want to work with are brought in at the time I need them.
The anti-static mat is always there though.

BTW
The top surface is the stainless steel covered with Teflon.
This surface is the one usually used as the magnetic tools, clamps etc. need the SS.
On the bottom of this surface, I am covering the SS about 1 inch (fold over) which is taped on all four sides.
This leaves the majority of the steel exposed to touch the anti-static mat.

Never had problems with static affecting components.
It is very dry here.


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larryd

#301
Mar 08, 2017, 07:27 pm Last Edit: Mar 08, 2017, 07:44 pm by LarryD
When using your hot air wand, protect the surrounding components from heat damage.

Aluminum foil tape link









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larryd

#302
Mar 08, 2017, 07:30 pm Last Edit: Mar 08, 2017, 07:30 pm by LarryD
Use heat shrink to color code toggle switches.



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larryd

#303
Mar 09, 2017, 04:44 pm Last Edit: Mar 09, 2017, 04:45 pm by LarryD
Moving that USB power adaptor around can be a real pain.
Consider replacing your workbench outlet(s) with one that integrates a 3.1 amp USB jack.

https://www.lowes.ca/electrical-outlets/legrand-radiant-15-amp-125-volt-white-indoor-decorator-wall-outletusb_g2603912.html?searchTerm=usb






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Jiggy-Ninja

#304
Mar 09, 2017, 07:24 pm Last Edit: Mar 09, 2017, 07:24 pm by Jiggy-Ninja
What's a source for that timer? I've seen ones that can schedule on/off times be not one like that.

On the subject of power strips, you can get ones with sockets that are rotatable or spaced out so that you have options for fitting in those stupid fat wall warts that come in 100 different shapes and sizes and can never fit together on normal power strips.

Also with individual outlet switches.
Hackaday: https://hackaday.io/MarkRD
Advanced C++ Techniques: https://forum.arduino.cc/index.php?topic=493075.0

larryd

#305
Mar 09, 2017, 07:48 pm Last Edit: Mar 09, 2017, 07:48 pm by LarryD
Wall Timer.

'Can' supply inductive loads:
Timer 1 link


Not sure if this one can supply inductive loads though:
Time 2 link


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larryd

Someone asked the source of the crimper used in this thread.

Stay away from the cheaper ones on eBay.

This is the one used:
https://www.pololu.com/product/1928




The Yellow one was purchased at a local store, cannot remember which one.

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larryd

#307
Mar 10, 2017, 04:37 pm Last Edit: Mar 10, 2017, 04:38 pm by LarryD
Further to post 297.

Angle bracket:
https://www.sparkfun.com/products/10228








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CrossRoads

Where do you get Kapton tape? I'd like to use some to hold components on the bottom of PCBs while reflowing the tops, just in case, but it's really pricey at Digikey & Mouser.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

larryd

#309
Mar 10, 2017, 07:33 pm Last Edit: Mar 10, 2017, 07:55 pm by LarryD
Where do you get Kapton tape? I'd like to use some to hold components on the bottom of PCBs while reflowing the tops, just in case, but it's really pricey at Digikey & Mouser.

I got some a while back on Amazon but they are out of stock right now.
https://www.amazon.ca/gp/product/B01I6PFDJ8/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

Looks like there are lots of options though.
https://www.amazon.com/s/ref=nb_sb_ss_c_1_6?url=search-alias%3Daps&field-keywords=kapton+tape&sprefix=kapton%2Caps%2C169&crid=AOKIWPJ6NH2V


This one is fulfilled by Amazon so you should get it right away in the US.
1 Mil Kapton Tape (Polyimide) - 1" x 36 yds.
https://www.amazon.com/Mil-Kapton-Tape-Polyimide-yds/dp/B006ZFNB2I/ref=sr_1_7?ie=UTF8&qid=1489170378&sr=8-7&keywords=kapton+tape

1 Mil Kapton Tape (Polyimide) - 1/2" X 36 Yds
https://www.amazon.com/dp/B006ZFQNT6?m=A1RYF7WY9L3HL5&ref_=v_sp_detail_page

4" x 36 yds - 1 Mil Kapton Tape Polyimide Tape
https://www.amazon.com/dp/B00ATRYG86?m=A1RYF7WY9L3HL5&ref_=v_sp_detail_page

Items "Fulfilled by Amazon" are offered by a third-party seller, but shipped from an Amazon Fulfillment Center to you.



Just thinking out loud, if the components are soldered on one side then cooled.
Then you turn the board over and place it on ceramic posts/tiles/spacers, will the surface tension hold the comeponets on the underside to the PCB?

http://www.bigceramicstore.com/kilns/kiln-furniture/posts.html

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larryd

If you use a setup like this, the bottom side (opposite to the controller side) could be done manually, shouldn't take more than a few minutes per board. ;)




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CrossRoads

"will the surface tension hold the comeponets on the underside to the PCB?"
Supposedly - but I'm gonna have 20 pin SMD connectors, those are pretty hefty,  I don't want them dropping off or sliding around if things aren't quite flat. Some examples (haven't ordered yet);
http://www.digikey.com/products/en/connectors-interconnects/rectangular-connectors-headers-male-pins/314?FV=fff40016%2Cfff802f3%2C1140003%2C16c026f%2C1bf80001%2C1f140000%2Cffe0013a%2C1680001&mnonly=0&newproducts=0&ColumnSort=1000011&page=1&stock=1&pbfree=0&rohs=0&k=header&quantity=&ptm=0&fid=0&pageSize=25&pkeyword=header

I'll take a look at the Amazon links, thanks.
I suppose once soldered, I could use a piece of perfboard to hold them in position in the oven as well, then it'd just be the one chip, cd74HC4050, to worry about.
The MegaDip/MegaWeeeny has a lot more parts, the biggest being the 3.3V regulator in a DPAK, I don't want that falling off either.

Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

CrossRoads

Your pic - you mean just to elevate board? Yes, I have a stack of ~ 30mm square boards that I use for spacers to hold the boards off the tray we use in the oven.

Those SMD connectors are expensive. I'm gonna try just right angle breakaway male headers as well.
http://www.digikey.com/product-detail/en/sullins-connector-solutions/PRPC040SBAN-M71RC/S1111EC-40-ND/2775294

That looks a lot more reasonable!
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

larryd

Yes, for elevation.

Hum, I assumed you would solder the headers by hand, after the SMD components were soldered.


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CrossRoads

Trying to get away from that since the '4050 needs soldering too. Apply past to the board, plunk down three parts, stick it in the oven. Done. Way faster than 56 solder joints by hand.

MegaDip/MegaWeeny, that will be done by hand. Needed holes to accept either male or female headers of different pin lengths, the SMD pads need a lot of room, and the board was already 8/10ths wide. Folks can install what they want, keep it down to a 2-step assembly process, or we'll charge a little more and solder whatever on as a 3rd step.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

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