Electronics > Projects, Designs, and Technical Stuff

Yet another resistance decade box

<< < (3/87) > >>

Dave:
I see these being useful for experimenting with values for something like loop feedback adjustment and whatnot, but there is one major problem that these have. They go open circuit while you are switching a value, which could leave the loop momentarily without feedback, making it go crazy. The solution to this problem would really be quite simple, you'd just have to make sure one of the wipers hits the next contact before the other one leaves the first contact.

I sketched up something in altium that I think might work.

Macbeth:
Genius idea! I much prefer the original compact design than the longer one. Perhaps some of that spare PCB could be used to make L shaped shims for stacking them without gaps?

@Dave - Another great idea!  :-+

Fortran:
@Peter - Well you could always post a drawing of the mechanical layout of your switches.
Anyone who has one that matches could post where they got it.

I have no problems with ordering enough of them to be able to sell for around 1USD each, with ENIG. (Board only)
Plus 2-3USD per order for shipping anywhere in the world.

Dave has an excellent point.

PeterZ:
@Dave - great idea! I don't have any access to altium, but i tried to "draw" something similar in Sprint Layout.
I will try to etch a test board, only one layer to see if it works.

@Fortran - i added one extra layer to the gerber files (board outline + npth holes). You can import it to your PCB software and use as a template.

Fortran:
I made a quick drawing from the gerbers, as one would measure with calipers.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod