Here's another layout for a MOD pedal, the Trill Tremolo. On board pots and LED resistor to reduce the offboard wiring mess. I built this one this past summer and I liked the way it sounds, though the Speed control should probably be a reverse log pot. Haven't had the opportunity to experiment there yet. Here's a demo of the MOD kit:
The layout is verified and here's a few pics from my build.
I've made something based on this layout and a schematic I've found online. I really like how it sounds.
ReplyDeletehttps://www.youtube.com/watch?v=ZQknuDFLPII
is it possible to replace mpsa18 with 2n2222 just like em-drive?
ReplyDeletei'm running out of mpsa18 and socket... :D
You could try the 2222s, but higher gain transistors are a better route to go. 2N5088/5089 or BC550c would be good subs.
Deleteawesome, I got plenty of 2n088 and bc550c.
Deletethanks brother, it will be my next project
Hi man,
ReplyDeleteI have built it but all I got was clean sound when I turned it on. Any idea?
Guessing the LFO isn't working right for you. Here's the schematic:
Deletehttp://i.imgur.com/n5tE8Is.png
The LFO is the bottom 2 transistor. Make sure the components going there are good.
Hello, I too have a clean output signal, a noise, like running, but there is no effect. All carefully checked several times.
ReplyDeleteIs there an easy mod to add a blinking led to this that changes with the intensity?
ReplyDeleteNot really an easy mod with the existing board, but I think the LED would go between the collector of Q3 and the other components it connects to.
DeleteHello storyboardist! I'm again with another noob question, i'm thinking to take on this tremolo next weekend, but the 100uf capacitor don't appear in MOD schematic, what is their purpose?
ReplyDeleteThat's there for power filtering. Not completely necessary, but a good thing to include.
DeleteI just finished this board but when I tried that speed control was gradually disappearing while I was playing a guitar and, besides I noticed in your actual picture without the 100k resistor next to 100nf so I'm plotting. I hope you can help me.
ReplyDeleteWhat i means the speed tone control was .....
ReplyDeletethere are not signal on q2, what i have to do?
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