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So it looks the shottky flyback diode was chosen for convenience rather than a technical purpose. Glad I don´t have any of those super solenoids in my pedals. Great little 555 squircuit by the way.

I noticed that all of those relay bypass circuits uses a shottky diode in parallel to the relay coil to tame the kickback voltage. Somebody further up mentioned that he experienced a lag upon relay turn-off, which could well be attributed to a shottky diode. I had recently done a circuit with a...

FYI: I made an compression indicator LED circuit around a design note from THAT that fits seamlessly into the ET. This has turned out indeed useful. You'll find it on my website.

Re: compression indicator LED: this is the circuit I am addressing in my first post. It has been suggested in the other forum. The OP suggested that it may draw its supply from Vref, which I felt was placing a very high load onto the OPA stage driving Vref. Indeed this issue has been addressed...

Yes, and because there is a feedback into the side chain, you run out of gain eventually, because ratio is derived from a signal that is already compressed. The more you wind up ratio, the more compression until this game stops eventually - you run out of gain. This means at some point the ratio...

This thread is not too old, and what I have to say belongs here, and nowhere else. There is some observations I have made independently of what Chuck writes here, and many are overlapping. Remarks in no particular order. The threshold pot does not control threshold in the traditional sense...

Chuck, sorry if my answer is delayed. I don´t look into this forum too often. Ah, interesting. Yes this is certainly some finesse I don´t know about. I usually believe in the good and that those things are considered by the designers. And they probably were... But then again, the thing with the...

Some will say this thread is too old to post. Maybe. But what I have to say belongs here and nowhere else. The Photon Vibe consumes about 80mA, says the display of my bench supply. The MAX1044 / 7660 (they seem to belong to the same company these days) datasheet does not really say how much...

I had not spotted the huge electrolytic on the output of rail splitter OPA. This is indeed commonly advised against. The R/C in front plus the OPA's driving stage take care of the purity of this rail. My unit exhibited quite a bit of switching noise, which may partially due to the cheap...

Yes. So drop that notion. I am starting to understand. Yes buffering appears like the weapon of choice. Let's take this scenario. I presume you mean add the single neck coil in parallel with a b/m series connection. Series and parallel connection is an entirely passive thing. All pickups...

The loudness matching network, IIRC was no more than a set of fixed resistors. Indeed you could use a trim pot. I removed it again because it did not offer anything new or different, just a series connection sounding vastly similar to the parallel connection. With the loudness change it can at...

oh. I wrote a lot and then all was gone. I`ll be back tomorrow.

On my past experiments, I found accidentally the following: a louder signal is perceived better (this is long known). A series combination thus will sound better in a direct comparison. a series combination sounds sounds smoother (maybe less harsh into an overdrive) This is self-deception. I...

We do not know what it is connected to, but it looks like a ground plane used for screening purposes. This is somewhat similar to boxing the affected PCB section into a metal cage. If used correctly, this "catches" some noise. The charge pump radiates noise for sure, but the frequency is out of...

Any buffer is clear/clean/transparent. MOSFET adds noise. I think you get this a** for elbow. The buffer it added to the front and is active as soon as you power the pedal up. A good example can be seen in the AION Halo Deluxe. A small slider switch determines if you have a true bypass or a...

freqboost There is a schematic on the web from muzique.com that is indeed incomplete. It shows only the principle. You find a complete working pedal in C.A.'s book "Electronic Projects for Musicians", project # 10. The complete pdf is on the web, you have to poke a little...

Certainly. The box is a cast aluminium box Type A as my dealer calls it (90x38x30mm). It contains a 9V block battery (which lasts for years), a small j-fet buffer PCB and a standard guitar female connector. I used a Pure Tone specimen, since this guarantees contact even if the cable is moving...

Greetings all. @Passinwind asked me to chime in, because buffering is my speciality. For any coil wound pickup you to sound good, you want to have it a moderate resonance peak at 2-3 kHz. Unloaded, it has a peak far above that, which is not considered musical or useful. You want a capacitor...

I just found this here from JHS pedals: Understanding Buffers And this is closer to the truth IMHO. That said, you may ask yourself: "from when on do I experience tone loss?" From the moment the signal leaves your guitar. The lower your drive impedance is, the more it can drive without loss...

The principle of a bootstrapped device is actually quite simple to understand. Cornish buffers are emitter followers, meaning they have a voltage gain close to one. On emitter followers, the signal is taken from the emitter and it is nearly a 1:1 copy of the input. A suitably large capacitor...