Post pics of your builds....

[Secret Squirrel]

The switch was the 2nd most expensive component. The stepped attenuator was only 2 dollars more.
http://www.mouser.com/index.cfm?hand...oductid=566895

[skyskraper]

which stepped attenuator is that and where did you buy it from?

[Secret Squirrel]

The attenuator is available from Triode Electronics.
http://store.yahoo.com/triodeel/4pol24posals.html

[__redruM]

I Think I'm finally done with my PPA. I changed to a larger volume knob that looks alot better.

[kloan]

Originally Posted by Secret Squirrel

The switch was the 2nd most expensive component. The stepped attenuator was only 2 dollars more.
http://www.mouser.com/index.cfm?hand...oductid=566895

holy cow $20!! well, at least it looks cool... how does it actually work? is it a push button that pops out when off or is it a digital button?

[Secret Squirrel]

I had to use a " Flip flop " latch circuit to turn the pimeta on and off.
http://www.discovercircuits.com/PDF-FILES/4013cir.pdf
It was definitely a complicated route to add an on/off switch. I ended up using a max6816 to " debounce" the switch and make it much more reliable.
http://www.maxim-ic.com/appnotes.cfm/appnote_number/609

[kloan]

:blink:

looks complicated..

red wire goes here...... red wire goes there.... that's the scope of my expertise... :580smile:

[DarkEternal]

some pics of my stuff...just a cmoy





added a window and an led which pulses along with the volume of the music

plus some pics of some random gear

[individual6891]

Originally Posted by Secret Squirrel

I had to use a " Flip flop " latch circuit to turn the pimeta on and off.
http://www.discovercircuits.com/PDF-FILES/4013cir.pdf
It was definitely a complicated route to add an on/off switch. I ended up using a max6816 to " debounce" the switch and make it much more reliable.
http://www.maxim-ic.com/appnotes.cfm/appnote_number/609

The switch if of a standard vandal resistant type switch which you can find in most places.

Regarding the debouncer - A simple capacitor and schmitt trigger could have done it for a lot less in price - Case and wiring look nice though (silver wires a teeny bit overkill on pimeta? - or never too OTT?!)

[Secret Squirrel]

Tried the Schmidt trigger, but I found that the MAX6816 was much better to deal with switch bounce. As far as being over the top, this amp was more of a learning exercise than the final goal. Plus, I did not want to practice on my PPA.....yet