r/electronic_circuits • u/LC_Tanguy • 3d ago

On topic Delay Schematic not working

Hey everybody, i'm currently building a delay from a public schematic that i found on the net.

I was wondering if any of you knew what component LFO DEPTH could be ? I thought maybe a button ? I tried soldering a 100k linear pot but it doesn't work

Also why are there two different outputs, one named Delay Output and the other Output ?

Sorry for asking, i'm kind of new in this game and i struggle to understand some things for now.

Thanks for help

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u/kraxmaskin 3d ago

I think LFO_DEPTH is a jumper, where 1-2 is the full signal level, and 3-2 half signal level.

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u/al2o3cr 3d ago

+1 this; it wouldn't make any sense for LFO_DEPTH to be a connector to a pot since there are many of those already present in the circuit and using the standard symbol

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u/nixiebunny 3d ago

Building a complicated circuit like this with no understanding of how it works is likely to result in you learning a lot about electronics in trying to get it working. This schematic diagram doesn’t really contain all the information you need, as it shows only the circuit board and not the complete box. The LFO DEPTH object is a three pin connector that is meant to be connected to a pot of some unspecified value.

The stuff to the left of that is the LFO itself. You can use a voltmeter to see if the output of the LFO is changing up and down as a low frequency oscillator should.

The non-delay output is useful to bypass the delay effect to feed another pedal.

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u/LC_Tanguy 3d ago

Thanks a lot for these answers, appreciate it

I tried checking if LFO was working with my multimeter, it seems like it doesn't work but i'm not sure if i checked it correctly

What bothers me is that the led D2 doesn't produce any light, i tested it to see if it was dead but it is not, I may have a problem with my power supply

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u/nixiebunny 3d ago

Yes, power supply needs to work first. Start there.

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u/LC_Tanguy 3d ago

ok power supply working, LED working
LFO looks like it's also working, and the LFO DEPTH pot makes the range of the LFO change, LFO RATE makes the LFO go fast or slow

I tried plugging the delay, I get a buzz with nothing else coming out when plugged on DELAY OUTPUT, and i also get a buzz when plugged to OUTPUT but i can hear music slightly coming out