Electronics > Projects, Designs, and Technical Stuff
Yet another resistance decade box
garnix:
--- Quote from: LeonV on July 28, 2016, 04:34:51 am ---Will try these:
http://www.aliexpress.com/item/Black-18mm-x-6mm-0-9-Digits-BCD-Code-Pushwheel-Thumbwheel-Switches-KM2/1804257049.html
--- End quote ---
I got those as well - seem to work. Just be aware that there are no end-caps.
BTW, is there a seller who sells end-caps for those wheel switches?
all_repair:
Thank you Fortran. Got my 6 sets of PCB and 5 sets of resistor kits. I felt bad that you must have taken so much time to pack them so nicely. And thank you Peter for the PCB work.
I have used an electrical conduit plastic as the enclosure.
ez24:
--- Quote from: Fortran on July 28, 2016, 06:59:30 am ---If you have problems with No. 3, you probably have a solder-bridge to the via that goes underneath it.
Check if it's shorted.
--- End quote ---
I spotted that one of the vias under 3 had solder in it. I bought 6 sets for 2 set of switches, so now I am down to 5. I cannot fix it.
I pre-tinned my next board and was very careful of the vias and did a decent job of soldering BUT 100 % failure. Did some random continuity checks plus I found a 10x magnifying glass and everything looked ok. Was about to give up when I thought the "fingers" could be the problem.
I bent up the fingers and it worked, every range OK. Now I have two boards done :-+
Getting experience with these SMDs. My feeling is god did not intend for humans to use these things. Tomorrow I am going to try #3 (1k) :-+
Once again I want to say thanks to everyone that put this project together, and especially to Fortran for selling the kits. I am thrilled at 68 I can solder the damn things. (and see them)
I will admit I am not clear how I wire the switches together (series ?). I think so far there is only one picture and I do not get it. I hope people will start posting pictures so I can figure it out.
Again I really appreciate the work of the members who put this together, I am having fun.
johnmx:
As promised here are the photos.
ez24, you can see the connections in my pictures.
An easy way is to use two long rigid wires. Put all switches together and insert the wires through all switches.
Now solder all the pads except the two pads where the external wires go. After that just cut the wire according to the picture.
ez24:
--- Quote from: johnmx on July 29, 2016, 08:46:31 am ---As promised here are the photos.
--- End quote ---
Thanks
Your soldering sure puts mine to shame :-DD
Just curious - what soldering set up do you have? Do you pre-tin the pads?
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