A twisted tale about a logarithmic relay attenuator

[Russ White]

Hey guys disregard the first layout I posted, it actually has a couple problems, and I am working on a much better one.

Here is the plan. I will be posting PDFs for a single side version(actually a few versions) and Brian and I will likely produce kits for a more optimized double side version(s).

Cheers!
Russ

[promitheus]

That sounds great !
I cant wait to see the new boards.

[apassgear]

Originally posted by promitheus

A mute Relay would be helpful to make a time delay on turn on etc.

A mute relay would be a nice addition if Russ decides to it, an easy addition if space allows. The board looks quite crowded as is so let’s hear if this is possible.

[Russ White]

Originally posted by apassgear


A mute relay would be a nice addition if Russ decides to it, an easy addition if space allows. The board looks quite crowded as is so let’s hear if this is possible.

A mute relay (optional when stuffing the PCB) will be on the new PCB. Stay tuned.

[herm]

Russ,

I was looking at the pic board again. Naturally, I am IMpatiently awaiting the kit. Or at least the boards.

Anyway, I have a few requests that would make your boards more flexible for DIY use:

1. Can you wire all 18 outs to resistor/FET output Pads?
2. Can you add an ICSP header?
3. Can you make the unused portion of the board into vector board? Or better yet, Proto space with power & ground lines, and trace connected pads for easy circuit addtion?
4. How about a Crystal mounting spot?

Actually, I think making the spareboard into proto space would solve all issues. I could easily add anything I want! The possibilities are endless!

FYI, I have never done any PIC or PCB stuff, so my comments may be complete newbie drivel. Feel free to say "Objections Noted" and ignore me if I'm full of BS!

herm

[mpmarino]

I just thought of another advantage of this set up. Because it uses a pot instead of an encoder, it can be retrofitted into almost any piece of gear with a pot. Just put it in line.....minimally invasive. Pretty cool!

[BrianDonegan]

Hmmm. That's a pretty good freakin' idea!

Wait, I meant, yeah, we thought of that...

[Russ White]

Note IDC connectors and only six jumpers.

There are pads for all the available pins on the PIC and one each for GND and +5V.

It sounds great, with clean/smooth volume transitions.

The two PCbs are designed to be stacked, but I don't have the correct standoffs right now (on order). But even side by side they are smaller than a standard CD case.

Cheers!
Russ

[Russ White]

Here is the schematic, easy as pie.

[Nordic]

...if you know how to make pie of course, with nice PIC sauce.