I want to build a binary counter that uses relays but I can't find a schematic does anybody have one?

 

You can't find a schematic because they stopped doing such things around 1930. The schematics fortunately crumbled to dust before anyone could scan them.

Why on earth would you want to do such a thing anyway? Electric bill too low?

 

audio fanatics sometimes build fancy potentiometers out of a bunch of relays that are switched in binary.. I built one for my friend, but it was all done on a microcontroller.

Steve

 

I want to build a really big and noisy binary clock.

 

Are you making the clock out of 100% relays? Is using digital logic to control the relays out of the question?

 

The clock can be made out of anything. I want to use the relays instead of a binary counter IC. I just want to show how comupters worked 70 years ago.

 

Well, then check out this page:
http://www.electronixandmore.com/project/relaycomputertwo/

Harry Porter's relay computer is on this page:
http://www.cs.pdx.edu/~harry/Relay/

Lots of Google hits: http://www.google.com/search?hl=en&q=relay+computer

 

Are transistor drivers allowed or we stuck with 12SN7's ?

 

Not at all - I have a load of 717A's if you want to get the frequentlys up.

 

audio fanatics sometimes build fancy potentiometers out of a bunch of relays that are switched in binary.. I built one for my friend, but it was all done on a microcontroller.

Steve

audio fanatics got to go to MAXIM 2mm digital audio controller.

 

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