Search results

Like cheap beer. Headache included.

My GF bought me a whole case of these beers. What in the world? Where do you even buy this? AliExpress? Tayda? No label at all. Not even "No Name" . Just says Beer/Bière.

What I don't get is how the two transistors work, seeing that they don't have a DC path from their emitters to ground. Also, the PNP seems to go between... GND and GND at both ends??? Makes no sense. It's not powered in any way.

I haven't tried this myelf, but apparently there's a way to run Tina-TI on a Mac using Wine: https://www.diyaudio.com/community/threads/how-to-run-tina-ti-on-your-mac-for-free.409104/

You can download Tina-Ti and open the txt file I attached (change its extension from .txt to .tsc). Then press CTRL-A and you'll get a frequency response plot for different pot settings. Something like this:

To prove you're not a bot 😁

There's this too. Possibly the easiest to get started with, but I have barely touched it myself: https://www.circuitlab.com/

^ I second that motion. It may be a bit hard to get started with a circuit simulator, but if you get the hang of it, it will have been time well spent. Having said this. I tried LTspice and there was absolutely no way in hell I was going to deal with that. I absolutely hate the user interface...

I can confirm that Dailywell are very good. Nothing wrong with them.

Yes, but I believe @thunderaxe is planning to use that extra opamp for something else eventually. And in this particular, simple circuit, there's no real benefit from an opamp-buffered VREF, since nothing draws or sinks significant current to/from it.

C2 in Sour Grape will help reduce ripple to some degree, depending on the output impedance of the power supply. The "stiffer" (lower impedance) the power supply, the less effective is C2 at filtering. If you look at R17 in Dream Fuzz, its main purpose is to help with PSU filtering when combined...

That's on the Dream Fuzz. I was talking about Sour Grape. My bad, I forgot to mention it.

Just wanted to point out that the R7/R8 divider will dump whatever noise/ripple there is in the AC power supply straight into the op amp input. Why not simply tie pin 5 to Vref through a resistor?

The unused op-amp could have been put to good use as a rail splitter, I suppose.

I did, and got really really drunk 🤣

I forgot about the thermal camera, it's been a while since I used mine. Great troubshooting tool if you have one.

Did you ever have to find a power short circuit on a board with dozens, if not hundreds of little power decoupling caps all over the place? And they all look fine! How do you find the culprit? Wherever you measure across power, it's a dead short. Or is it? Not if you use a milliohm meter...

I actually prefer soldering (and desoldering!) SMD parts to through hole. With the right iron (I use old Metcals), tweezers and a magnifying glass lamp or goggles, it's a piece of cake. I'm 53 btw, with the usual eyesight issues, so it's not just a young person's game.

Here's a selection: https://www.digikey.ca/short/h3q4zrpj

100v rated X7* will work well just about anywhere in a pedal powered by 9 or 18V. They'll likely stay within +/-10% through any temperature change or voltage that a pedal is likely to see. Just don't use them where a tighter tolerance is needed (5% or less).