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After some screw ups on my part with the EV Mini, it worked marvelously. (Note to self: just because you sorted resistors correctly doesn't mean you still can't screw it up, so always double check their values before soldering). You can find some gut shots here. Then I got around to building...

Just an idea, but have you attempted to simulate what you want to do manually? For instance remove the ATtiny from the equation completely and have 5v running to two on/off spst one for each relay. That way you can determine if it's the circuit or your code.

Guilty as changed. I ended up bookmarking a page with the codes so I'll have a reference going forward.

I've got an ultrasonic cleaner but use it to clean clock parts; what cleaning solution do you put it in to clean the flux?

No worries, that was the problem, guess I threw some resistors in the wrong pile and didn't pay attention. 😦

The gain and bias trimmers both affect the brightness of the bulb. I'll definitely focus on going backwards from that capacitor to the reference voltages.

Full on with no LFO action.

I changed r14/15 to 4k7 but still no luck. My assumption is that C8 is the capacitor between the two 4k7 resistors in the top right of the board below the c100k pot.

The top board works with no issues. It's the LFO that doesn't start. I can always desolder the 2.2uF and 1.5k resistors and switch to the 1u and 4k7 resistors but I would like to have a little more depth at slow speeds.

I am currently wrapping up an ElectrVibe Mini build and ran into the problem with the LFO not starting up. I can manually cause the bulb to increase in intensity via the gain and bias knobs and hear a change in the tone (as you'd expect in a Vibe), so I know the rest of the circuit works. It is...

Thanks! Everyone has to got to live with my ability to basically play the same few chords over and over again.. maybe next time it'll be Rock You Like a Hurricane. :)

A really great build. I built two of them. One for me and one for a friend. I didn't deviate from @PedalBuilder 's design because I thought it was really awesome -- all I did was tweak the colors and gains on Q1, 2, and 3. They are both using the highest gain GT310b transistors that I had, so in...

Very cool build and it sounds like you learned a lot! Unfortunately, a lot of pedals are just noisy because of the limitations of the components they're built on and it just becomes part of their charm. For truly silent and clean operation you'll probably have to move to DSP chips but then you...

So, you've now entered the world of embedded systems. :) Are you sure it isn't the code you're running in the ATtiny85?

While I feel you reap what you sow, it's sad when others get caught up in the results. That being said, many American businesses have been short sighted and we've been in a long decline for any type of physical manufacturing. Relocating manufacturing plants, fabs, and knowledge overseas for...

Having started down this path about a year ago your rules are spot on. A few other quirks / behaviors I've noticed are: 1. Tons of folks who say they will buy it but then don't show up when it is offered for sale. 2. Folks buy to a price point not quality -- even if they say they want quality...

After debugging via DM, these all work!

I can't access them.

So, as someone who is starting down the path of building these.. do you have the drill templates for them you'd be willing to share? 😁

Even if the tube screamer gain stage output drives an envelope filter that controls the tap tempo on the connected delay? It sounds like I have a new thing to do...