Fake op-amps
I bought some op-amps from Aliexpress a few days ago. They seem to be working. I patted myself on the back for getting a such a deal, they were about $0.08 each! All of the parts seem to be working…
Mitchell
Timmy clone
Timmy is a boutique overdrive by Paul Cochrane. This pedal generated a lot of discussion over the ethics of cloning pedals. A couple companies were accused of cloning Timmy. Most of the most popular boutique pedals out today are clones of…
New PCB day!
I have a few new PCB projects in the mail today. Flatline Compressor by John Hollis Titan Boost by John Hollis Tremolo-matic XXVIII from Stompboxology Distort-o-matic XI from Stompboxology Bobtavia by Bob Starr John Hollis John Hollis was one of…
Cheap parts from Aliexpress.com
I need some op-amps, usually I’m buying these from Tayda Electronics or StompboxParts.com. Tayda is the cheaper of the two but StompboxParts ships faster. In this case neither place had all of what I wanted in stock. I wasn’t in…
The Crank by Mark Hammer
This is interesting variation on the Tube Screamer style diode clipping. Read more about it at Mark Hammers site here: In a nutshell the goal seems to be less distortion. More of a booster to overdrive effect. I’d say…
Tremolo-matic X by stompboxology
This circuit is based on a type of tremolo that some Fender amp models. Its operation is very interesting. It splits the signal path into a low pass and high pass routes and alternates crossfading between each. It has a…
Experimenting with the mill
These are some experiments to render some patterns on the mill. I did a wave pattern on a powder-coated green box and two bare-metal boxes. I also did a pattern similar to the cover of Joy Division’s UnknownPleasures. The green…
Tremolo-matic XXII v2
This project was originally from the Stompboxology newsletter. In a discussion about the circuit, the question came up about an extra op-amp used to create a second bias voltage buffer. This appears twice on the schematic as IC1B and IC2. IC2…
UBE Screamer 4069
I wanted to do something a little more artful as a box. The Joy Division’s Unknown Pleasures has a very iconic image. I don’t know what the secret sauce of this image is but it’s very compelling. From what I…
Tremolo Matic XXII Stomboxology Update
I updated the Tremolo Matic XXII from the stompboxology newsletter by removing the single op-amp. It looked like this was used as an extra buffer for one of the reference voltages. Everything works without this extra op-amp but there is…
Smash Drive Aron Nelson
Smash Drive is a DIY community project by Aron Nelson, who runs the DIYStomboxes.com forum. Smash Drive is a overdrive/distortion built from the LM386. Its simple and easy to work with. you’ll find the 386 in many guitar circuits. its…
Silicon Tone Bender
Here is a Silicon Tone Bender built around four BC109 transistors. It sounds pretty good! The original circuit was provided by user Mic Tester over at FreeStomboxes.org. I built this some years ago on a piece of strip board. I…