Recent content by MattG

Yeah, put another way: the "scale" is the $59 threshold. Cram as much as you can into an order, but keep it under $59 so the cheap shipping option remains available. Cheap shipping is just that: cheap (ironically cheaper than comparable domestic shipments). Past $59 and cheap shipping is no...

I saw that too, I'm guessing the IB1209S called out in text makes up the "bridge" between the top and bottom portions. A quick web search said that is a DC-DC isolation device. To @djmiyta, sounds like you already bought the 12v power supply. But you might consider adding a 5v USB-C power...

I just placed my biggest (in terms of dollars spent) order at JLC, and even though the tariffs aren't 100%, the net effect is that my order cost was literally doubled due to an avalanche of extra costs. It looks like the cheap shipping option, the "Global Standard Direct Line" is only available...

If indeed the T and R footswitches are SPST momentary (i.e. they are open- or closed-circuit normally, and then closed/opened only as long as the switch is actually pressed), then yes, that exactly matches what I laid out in my previous post. As for buffer pre- or post-split. We're starting to...

Broadly speaking, the "bad" spot for a buffer is when the next device in the chain has a low input impedance that you want to exploit deliberately. Vintage fuzz pedals are the standard example: they have a relatively low input impedance, meaning they load guitar pickups; the result is that they...

Sorry if you read my first version of this reply - I had a major brain-fart. This is a re-write which is hopefully accurate! Trying to follow your intent, the way your schematic is drawn now, I believe the truth table would be as follows. I am assuming that S1 and S3 always operate in tandem...

You could try a linear ("B") taper pot for volume. The maximum available volume won't change, but unity should be before noon on the pot. Note that I haven't done this! But also - in boost mode, a linear taper pot might make the volume control too sensitive. But if you predominantly use the...

This is indeed typical for Bluesbreaker-derived circuits. Some BB-derived circuits add an extra boost stage at the end, for example the JHS Morning Glory (PPCB Glory Hole) or Snouse Black Box (PPCB Pot and Kettle).

I use essentially the same scheme as what @jubal81 posted in this "quasi-IC" module. I posted the schematic in a similar DIYStompBoxes thread. Schematic attached to this post as well. After I posted to DIYSB, RG Keen replied and suggested I consider making it a single-in-line package, using...

Small PCB plus only one knob demands a 1590B build! :)

Great build! And having recently done my first 1590A build, I understand the mechanical/fitment challenges. So extra props to you!

Great build, thanks for sharing! ...but we need gutshots :)

I hadn’t thought of that… but now I can’t un-hear it!

Sure! It's truly just a little bit - it's basically R11 and C15. C19 at the input also provides a little filtering too.

Here's my submission for most boring build of 2026: an always-on unity gain buffer. It's... delightfully unremarkable! The opamp is an opa1678. Since that's a dual opamp, it's basically a double-buffer with a little bit of high-frequency filtering between active stages. (And the opa1678 has...