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DIY Stompboxes => Building your own stompbox => Topic started by: lightningfingers on June 10, 2004, 05:00:36 PM

Title: Is there an effect that will run off an AA battery?
Post by: lightningfingers on June 10, 2004, 05:00:36 PM
:?:  :?:  :?:

Just curious, and trying to see how small an effect I can actually build.

Yeah I know, im wierd :wink:
Title: Is there an effect that will run off an AA battery?
Post by: zener on June 10, 2004, 05:23:14 PM
http://bryant02.home.att.net/schematics/fz1a.gif
Title: Is there an effect that will run off an AA battery?
Post by: ExpAnonColin on June 10, 2004, 07:00:04 PM
Remember, button cells are 1.5v too ;)

-Colin
Title: Is there an effect that will run off an AA battery?
Post by: Tim Escobedo on June 10, 2004, 07:06:33 PM
I've had some success running a 74HCU04 off 1.5V. I'm not sure they're spec'd down to that voltage, however.

A couple simple transistor fuzzes will do it, too.
Title: 1.5v pedal
Post by: guitarhacknoise on June 10, 2004, 07:28:37 PM
there is also the cool, yet un-noticed ta-28 by heathkit. i think it sounds killer, but....
     http://www.muzique.com/schem/heathkit.gif
i have an original, and a home jobber, and actually the home-made version is a touch bit better!  ( a nice little pat on the back!)
   

       -i had to edit to put the correct location.  :roll:
Title: Is there an effect that will run off an AA battery?
Post by: brett on June 10, 2004, 08:25:30 PM
You could make a variety of circuits based on Ge transistors (they only need 0.3V to turn on and can work fine with less than 1V).  A fuzzface might be possible.  Just make the collector resistors much smaller.  e.g. the 33k resistor might become about 2k.  

FETs are worth a look.  Some turn on at -1V.  The common discrete MOSFETs (BS170, 2N7000) turn on at about 3V, so they aren't much use, but I'm sure that specialist MOSFETS are available that would turn on with just a whiff of voltage.  Regular Si BJT transistors need 0.7V to turn on, so you're skating on thin ice if you try them.  Probably better to use something based on germanium (like the FZ-1a).

have fun
Title: Is there an effect that will run off an AA battery?
Post by: javacody on June 10, 2004, 10:34:05 PM
where do you find the 2n2613? Or can I use any Ge transistor?
Title: Is there an effect that will run off an AA battery?
Post by: gez on June 11, 2004, 03:35:29 AM
Quote from: javacodywhere do you find the 2n2613? Or can I use any Ge transistor?

I've used mixtures of Ge trannies in different Maestros, it's not that critical.  What is more important is leakage.  Here's a thread from the other week with all the info you need:

http://diystompboxes.com/sboxforum/viewtopic.php?t=21909&postdays=0&postorder=asc&start=0
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