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I connect a pedalboard with stereo pedals(delays, reverb and a ditto looper x4)Tried connecting pin 3 and pin 3 but nothing changed, still a buzzing sound. I started from scratch a second time with 2 new guitar amps and still doesn't work like it should... I really don't understand. I don't know what to try... The pcb's were printed by OSH park, they work fine seperatly...

Ground is connected to both input left and right. That's why I don't understand why there's a buzz... when I use only one amp at a time and unplug a speaker it works perfectly, but the goal is to have a stereo amp!

Hello, I have a problem. I decided to make a mini stereo guitar amp, using 2 little chip amp based on the chime amp. I soldered everything, but there's a ground problem I suppose. There's this annoying hum when I plug only one cabble and when I touch the second input the hum is almost gone but still there. I rewired everything and still the same problem.

Is there something I don't know about doubling 9V to power 2 effects with the same power supply. Is there a way to isolate the ground on each pcb?

First pic shows the schematics and the second is the two pcbs connected together (the blue line is the ground path)

Finally, nothing works like it should. Tried switching the pins of the 2n5457 because there was an error but it didn't help, all I get is a buzz that gets louder when I turn the volume, but no guitar signal... Any ideas?

Hey guys, just a little update! There was a mistake on my pcbs, ordered them from OSH park and soldered everything, but it didn't work. Finaly, I found what was wrong (I think, didn't test yet) The transistor wasn't connected properly, the pins (D-S-G from top to bottom on my design) the input should have been connected to G and S should have been connected to R2. By chance, the pins on the Transistor are long enough to be twisted and place in the right hole, I'll try to wire it properly tomorow and run some test. Here's the pcb with the correction!

Alright, thanks a lot! Wasn't expecting a response so fast! Thanks guys, will correct the little things you mentioned!

Hello people, I'm new to all of this DIY guitar pedal thing. I know this is not a pedal, but it's a little project that looked easy enough for me to do. I made a PCB design using DipTrace and I was wondering if everything was OK with it, did I make any mistake? Here's the schematic and my final design, can someone confirm that I've done it right?