I've seen a few people playing around with discrete opamps in classic circuits, and thought I'd give it a go with one of my favorite...

Here's another one I was surprised I hadn't drawn up before. Like the Custom Badass '78 Distortion, it's also based on an ol...

The originals used a now nearly unobtainable SAD512D chip, but the wizards on FSB converted it to work with an MN3007. Now that those are al...

Here's one from MXR you probably haven't heard of before. It was apart of their Commande line of plastic boxed effects from the late...

I've wanted to draw this one up for a while. It's a fantastic clone/variation of the  Boss DS-1 Distortion. I had one for a while an...

This one was kind of a sleeper. No where near as popular as MXR's Distortion +,  the Distortion II was quite a bit more complicated and ...

Here's the MXR Distortion III. It's pretty similar to the MXR ZW-44, which itself is a Boss SD-2 clone. The main difference is hard ...

Got a request for this one. The schematics that come up with a Google search are all wrong apparently, but it looks like the good people on ...

I really enjoyed making the Big Muff Project file a couple months ago and thought it would be fun to make a similar project based on the MXR...

Got a request for Zakk Wylde's signature overdrive from MXR. It's essentially Boss SD-1 Super Overdrive without the buffers. Origin...

A while back Brian Wampler shared a bunch of mods to the classic MXR Distortion Plus circuit in Premiere Guitar magazine. It adds a tone con...

Here's the classic DynaComp compressor from MXR. This frequently cloned and copied effect has been an industry standard since it was in...

The Script version of the Phase 90 is probably the holy grail of phase shifters and was the first effect released by MXR in 1973. It's p...

The Micro Amp is a classic clean boost circuit first introduced by MXR in the late 70s. It's a great option if you need to stomp on some...

I've seen a lot of different PCB layouts online for this effect, but all of them had at least one jumper on the board. Jumpers aren'...

Here's the grey spec DOD Overdrive 250 that fits in a 1590a enclosure. You could also build a yellow spec 250 or the MXR Distortion + wi...

The classic '70s overdrive by MXR, and is essentially the same as the DOD 250 and Ross Distortion. I designed the layout to have onboar...