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Post by MaxRichardson97 on Jan 17, 2021 18:45:43 GMT
Hello! Hope all's well. So I'm an absolute newbie to working with electronics, but would love to try and play with pulling in some guitar pedal designs I've got lying around in some old books. The issue is, of course, quite a lot of these run on 9v as opposed to 5v.
As I say, this is my first time working on designing circuitry at all - so I'm a bit confused as to how to adapt these circuits to run on 5v instead? Is it simply a case of looking for different IC chips on AliExpress that work in the correct voltage range?
Cheers for the help, looking forward to sinking my teeth in!
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Post by robertlanger on Jan 18, 2021 9:46:15 GMT
It depends on the actual circuit; maybe some resistor values have to be changed, maybe another OpAmp, maybe it's even more easy with AE because the pedal circuit works internally on 5V anyway which is derived from 9V via a regulator (that can be removed then).
I'm sure the AE community (including me) can help! Indeed, the pedal world has some gems that are worth porting to AE...
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Post by keurslagerkurt on Jan 18, 2021 13:31:43 GMT
A fun, cheap IC on 5V to play around with is the PT2399 chip, it's designed for delay fx, but it can also do more reverb/chorus type effects. Lots of guitar pedals are based on this one, so with some googling you can find tons of circuits. Also the delay (lofi type) module of AE is based on this IC. To 'adjust' the 9V circuit for this one, you can usually just leave the L7805 voltage regulator out (this regulator does 9V->5V), and connect the AE 5V directly to where the 5V of the regulator was. One of the first stompboxes I ever built more than a year ago was based on this fairly simple circuit: tagboardeffects.blogspot.com/2012/02/i-thought-delay-freaks-may-like-this.htmlonly adjustment I made to the circuit, was adding a capacitor between pin 2 and 3. Otherwise my IC's seemed to be very unstable. Its an even more lofi version of the AE one, to my ears at least  Its a fun rabit hole to experiment around, and it can be very daunting! (dont know your 'science' background?) I found it very helpful to learn the absolute basics about resistors, caps, opamps and such when trying to read circuits. (EEV blog has a great opamp tutorial on youtube) |
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Post by MaxRichardson97 on Jan 18, 2021 19:21:19 GMT
A fun, cheap IC on 5V to play around with is the PT2399 chip, it's designed for delay fx, but it can also do more reverb/chorus type effects. Lots of guitar pedals are based on this one, so with some googling you can find tons of circuits. Also the delay (lofi type) module of AE is based on this IC. To 'adjust' the 9V circuit for this one, you can usually just leave the L7805 voltage regulator out (this regulator does 9V->5V), and connect the AE 5V directly to where the 5V of the regulator was. One of the first stompboxes I ever built more than a year ago was based on this fairly simple circuit: tagboardeffects.blogspot.com/2012/02/i-thought-delay-freaks-may-like-this.htmlonly adjustment I made to the circuit, was adding a capacitor between pin 2 and 3. Otherwise my IC's seemed to be very unstable. Its an even more lofi version of the AE one, to my ears at least Its a fun rabit hole to experiment around, and it can be very daunting! (dont know your 'science' background?) I found it very helpful to learn the absolute basics about resistors, caps, opamps and such when trying to read circuits. (EEV blog has a great opamp tutorial on youtube) Thanks a lot for the responses! I'm tentatively considering a 'Dist4tion' module, with four types of diode-clipping distortion based around some schematics I've found in some old guitar books. I'm still playing around at this point, we'll see how much the 9v to 5v stepdown will affect things going forward! |
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Post by keurslagerkurt on Jan 18, 2021 19:42:13 GMT
Cool! If you'd have a picture/scan of the schematics I'm curious to see it 😁
the first pedal i ever built was the so-called 'bazz fuss', which is like a five part circuit with a transistor-diode duo doing the distortion/fuzz work. It works great on guitar, and it's kinda the circuit that got me into DIY. 'something SO SIMPLE can produce such nasty sounds!', a bit of childlike wonder as grown up man 😁
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5v / 9v?
Jan 18, 2021 20:28:10 GMT
via mobile
Post by MaxRichardson97 on Jan 18, 2021 20:28:10 GMT
Cool! If you'd have a picture/scan of the schematics I'm curious to see it 😁 the first pedal i ever built was the so-called 'bazz fuss', which is like a five part circuit with a transistor-diode duo doing the distortion/fuzz work. It works great on guitar, and it's kinda the circuit that got me into DIY. 'something SO SIMPLE can produce such nasty sounds!', a bit of childlike wonder as grown up man 😁 I'd show the schematic if I had it designed yet 😂Essentially my idea is a 2u wide module with 4 inputs feeding in parallel to a gain stage and a diode clipping section, with different diodes (Germanium, Silicone, maybe LED) in each section. Master volume on each channel, and individual outs along with summing output mix! Hopefully I can figure it all out, made a bit of progress today! I've seen the bazz fuss mentioned! Looks an amazing little design, so much potential for such a tiny circuit. |
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Post by keurslagerkurt on Jan 18, 2021 22:12:51 GMT
Oh, I thought you were going to use a guitar pedal design, my bad! curious to see how the clipping fares in the AE world. Today my MCP opamps finally arrived, so I can start experimenting as well  |
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Post by MaxRichardson97 on Jan 19, 2021 14:24:29 GMT
Essentially I'm taking inspiration from those designs, and trying to turn them into something new! Lifting the diode clipping sections straight out of em, pretty standard stuff as far as I can see!
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