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Yeah I keep a folder of them and they're usually great for designing footprints in KiCAD. However, I've found switches and pots to be hit or miss. I'm also just not that accustomed to interpreting mechanical dimensions.

Hello, I am working on designing my first PCB with PCBmount pots (was originally wiring offboard panelmount). I would like to know any tips or precautions people have when working with PCBmount? In particular, I am curious if I mix PCBmount pots with solder lug switches, will there be vertical...

On this topic too, does anybody know of a good way to keep the fumes out of your eyes? My eyes seem to dry up when soldering. I can't imagine that's sustainable long term.

There's a great set of tutorials on op-amps by electronics tutorials on the web. For op-amp EQs, check out Elliot sound products.

That sounds about right. IC 5.2 is a buffer but it isn't providing any gain. The passive components before it form a bandpass. Possibly to remove some digital noise/distortion. That buffer is most likely there to separate the filtering preceding it and the output impedance of the FV-1 from...

Here's a graph of input response, it seems I *may* be wrong concerning the low / high passing attenuating below unity in the op-amp. The HF shelving effect is however visible. A pole (low pass) is formed by the gain pot and and C3 in the sim. That pole moves down in frequency as gain increases...

The LM308 in this configuration does not invert. Some op-amps do invert once voltage swing reaches rails such as the TL072. Its notable that the R3/5 & C2/3 are not true hi passes as the non-inverting configuration has a minimum gain of 1 so the LF blocking behavior of the caps acts like a...

Yeah I suspected that might be the case, there are instances where HF information can cause systems to oscillate or become unstable. But usually the filter cap is embedded in the active stage if that were the case.

Its not turned off, it's a laptop, the charger is what I'm referring to. Well my signal gnd at the input is a direct connection to the pcb gnd. Same goes for the power inputs (9V and GND). I see that I am be being unclear. I had connected the 9V and GND pins of my pedal to a traditional...

My PCB is a two layer with ground occupying the back. I noticed that if I connect my gnd pin of power to the gnd pin of the power supply unit, much of the noise goes away. Does a lot of noise tend to be handled upon mounting to an enclosure? While I've done a number of pcbs, I've not...

Hello, I am working on a pedal right now where I am troubleshooting 60 cycle hum when my hand touches the guitar strings and the other hand touches a ground surface. So in short, I think there is a ground loop forming at the input of my pedal. My input section is shown below. I have seen...

Their design notes section is top-notch; served as my first introduction to compressor design.

Its rather transparent drive. Let's a lot of the instruments character through.

There's a great opamps clipping comparison vid: You might like this for experimentation.

I don't connect with most scooped distortions. I find it tends to force the guitar to fight with other elements. What do you mean by refine here? Like tune the voicing, cut unnecessary components clean up noise etc? I haven't messed much with cascaded gain yet tbh. I understand the soft...

That's cool. You should post some sound clips. What inspired you to mod the Timmy, what's the sound you're after? The ORANGE do a really great job at cascading their gain stages. I'd be interested in a side by side.

I see where its coming from now. I will note that pg34 explains why they recommend 4V as the lower limit and confirms the phase inversion at high amplitudes.

We must be looking at a different datasheet or different spec. I see the absolute CMV spec as (V-)-.5V to (V+)+.5V but that's referring to a threshold of damage. Under recommended settings on pg12, it quotes (V-)+2V but that's for NS and PS, which to my understanding is more military spec...

It has recently come to my attention that the Common Mode Input voltage range of many opamp (especially TL07xs) substantially limits the voltage swing. https://www.ti.com/lit/ds/symlink/tl072.pdf?ts=1721265968534&ref_url=https%253A%252F%252Fwww.mouser.com%252F http://fpgacpu.ca/bass/bdi21.html...