Electronics > Projects, Designs, and Technical Stuff

Yet another resistance decade box

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krivx:

--- Quote from: Back2Volts on August 04, 2016, 03:25:40 am ---
--- Quote from: ez24 on August 03, 2016, 10:58:56 pm ---...  I thought maybe I could wire up external caps and make a cap decade box BUT it is a BCD switch. ...

--- End quote ---

There are at least two variants of the switches I know of,   BCD and (straight) decimal.   Just because I was looking for different colors ones I ended up ordering some decimal and some BCD.   

--- End quote ---

I have a feeling that the BCD and decimal switches are mechanically the same, only the PCBs are different.

Look at the pattern of traces for this BCD switch:

Fortran:
Yes they are the same switch.

As I mentioned earlier, I bought both and only the pcb differs.

ez24:
Fortran - there was some talk of decade capacitor boards, any new news?
Again thank you, I am learning how to solder SMDs

ez24:
Here is a completed switch on ebay, I think using a big switch:

http://www.ebay.com/itm/Seven-decade-resistance-box-0-1-0-ohm-to-9-999999-Mohm-resistor-substitution-/152192192192?hash=item236f5c8ec0:g:stEAAOSwaB5Xjkud

I wonder if by a member.

Edit - there are more sellers than this one

Fortran:
ez24:  Well I've had my hands full with these boards and a coffee monitoring system for work.  :)

I'm not even sure if I'll ever get time to make them, but since I want some for myself it might happen eventually.

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