Recent content by jubal81

I stopped having problems when I stopped separating grounds. When you think of a circuit, imagine it as a 3D energy field and "ground" as "return current path." Long story short, you want to minimize the size of each 3D field by running traces over one big, low-impedance ground plane. Problems...

A, motherfucker! Can you play it?!?!

New product! A pedal that tells you what note you're playing as you play it. "Learning the fretboard has never been this easy!"

This thing oozes cool!

Dude, sounds badass!

Is there a specific schematic you can share?

You can invert the signal on that PCB, but you'd need to cut a trace and tack on another resistor.

If you want an "inverting buffer," you can build it on a SHO PCB. Replace the mosfet with a JFET and the boost control with a fixed resistor equal to the drain resistor.

It's just a character of the Hotcake circuit. There are several variations that tinker with this. Aion did a nice writeup in the tracing journal. I built a dual EL84 Stangray last year and it's awesome. Love that thing. It's basically a Carmen Ghia with an EF86 input tube instead of 12AX7. The...

That looks great! It's a bufferless Tubescreamer with an extra clipping diode and the mid hump frequency shifted down to 300-ish Hz.

That's really sharp. The textured red and cream knobs are a helluva combo.

At first glance, the SW wiring is wrong. Power should go to CLR resistor -> LED -> SW pad

The return current for both sides would always be that Layer 2 GND plane. The only reason you'd need the extra GND vias to steer them is if you have two GND planes. Granted, one signal layer is 0.2mm from the GND plane and the other is 1.5mm. If you're laying out a 2-layer PCB, the ideal would...

That video got me thinking again about the 4-layer stackup for our purposes. I've been using Signal-GND-GND-Signal. This reduces the vertical space between the signal traces and their return current paths in the ground planes, but of course there's a catch. Whenever a trace changes layers, you...