[groggory]

I was just looking at some digital pots for a small cmoy, and wanted your opinions. If they work as well as I hope, maybe even for something nicer like a pimenta.

Here are some of the docs I've found that seem to be relevant

Digital Pot Doc
Digital Pot Doc 1
Digital Pot Doc using rotary switch

 

[blipblop]

Honestly, I wouldn't bother "maxing out" a CMOY like this. CMOYs are really not worth such effort put into them. I would build a PIMETA and try a digital Pot on that....

 

[groggory]

Quote:

Originally posted by blipblop Honestly, I wouldn't bother "maxing out" a CMOY like this. CMOYs are really not worth such effort put into them. I would build a PIMETA and try a digital Pot on that....

I consider CMOY's a cheap testbed for new ideas before throwing them into more expensive endeavors.

The way I figure it, I'll make a lot of different configurations, get them all working, and what I don't need I'll just sell for a small profit over parts cost. Maybe even take a small loss. Really depends. I'm just playing with the idea.

If I get a digital pot working with all the kinks ironed out, that'd save a hellava lot of board space for all the mico ideas I have.

rock on

 

[stereth]

http://www.fixup.net/products/pktamp/smini.htm

Fixup puts digital volume controls in some of his amps.

Make sure to check the specs. Search this forum and the DIY forum at Headwize for more opinions on digital pots.

 

[Frenchman]

I'm probably going to use a digital pot for my portable amp. Of course, I'm going to be controlling my amp with a pic so it will be siginificantly easier for me to pick and choose which codes I will use. You'll obviously need extra logic to control the circuit, but a simple up/down counter would seem to do the trick for these things. I'd say go for it. You'll just need to watch the resistance values at the codes you want. Other then that, I don't see why these aren't a completely viable replacement for any analog pot.