Search results

I did this successfully too! Thank you! The veroboard is a layout from Tagboard Effects for the Op Amp version of an EHX Muff Fuzz.

I built one this past January, and it sounds great! The LEDs are color-coordinated with the knob colors; green for green, blue for blue.

I added a little more solder and reflowed the pins on the FV1, and was able to get it working 👍! Didn't need to replace the crystal. Thank you!!!!

I went back to the original EEPROM, got signal again, and got the voltages for the FV1: Pin Voltage 6 3.3 8 3.3 13 1.6 14 1.6 15 0.425 20 2.79 21 2.60 22 2.88 23 3.32 26 3.39 I see that some of the voltages are low; not sure why. When I use it, there is no wet...

I got the replacement EEPROM, but now when the effect is engaged, there is no signal. I will get the voltages later for the FV-1 and post pics later.

I have the same problem... took advice to ground the left side of R5 and I could hear the FV1 working with tremolo, chorus, and something else. I'm going to order a new EEPROM and see if that fixes the issue.

Yes, signal but no effect.

The first was from eBay, but I got another from small bear. My problem still persists.

I checked the pot, and these are the values that I got: CW --- Lugs 1 to 2 = 520k Lugs 2 to 3 = 1.3r Lugs 1 to 3 = 520k CCW --- Lugs 1 to 2 = 1.4r Lugs 2 to 3 = 529.9k Lugs 1 to 3 = 529.8k The resistance on the IC is this: Pins 1 to 2 = 0.999M I don't know what VREFB is, so I didn't measure...

Not yet. I have tested the pot, and I get resistance, but this baffles me.

Anyone have any advice on what to do next?

I made a new audio probe, and was able to probe the circuit this time. The components before the pot are good, but when I got to the pot I wasn't hearing much, so I tested the rest of the circuit. I had audio on almost all the components, but about 1/3 of them I got static to bad noise. The...

I have one, and I tried tracing the circuit but got nothing in terms of output. I decided to hook the pedal up on my board and discovered that I now have sound in bypass and engaged, but the effect is not present. Not sure what to do next. With the audio probe, I was trying to use my phone...

1. 4.160 2. 4.147 3. 4.146 4. 0 5. 4.121 6. 4.304 7. 4.304 8. 8.60 Pin 1 at the pot = 4.145 also took the advice to lay some more solder on it I also replaced the purple caps with nichicons.

I've gotten the transistors socketed, the board cleaned, and I still have no sound when the pedal is activated. I also get no power to the LED. I was thinking it might have been the switch because when I tested the voltage at the LED when it's engaged, it was zero. Changed the switch, same...

Thanks for the responses. The color codes in the resistors are correct. The purple caps are supposed to be nichicons, but they don't look like it to me. Now I'm doubting their positioning. Thanks for the compliment on the pictures, I understand that it's important to be able to see what to...

Troubleshooting these situations are still new to me, so bear with me; I understand there is stuff for me to learn still, and I am working thru the schematic for the first time. Bypass signal is present, but no signal when effect engaged. LED does not light up, either. Rechecked all resistor...