Recent content by Mr.H

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...