Building the Electric Druid pedals


Hard Bargain high gain distortion, FilterFX multimode filter+8 waveform LFO, DigiDelay 4 second tap tempo delay, and Flangelicious flanger

This page collects together just the information you need if you’re intending to build one of the Electric Druid effects pedal/stompbox projects.

For each pedal, you only really need the construction guide, which includes the full bill of materials (BOM) and a wiring diagram for the PCB in the enclosure. We also provide a drilling template for your enclosure.

Each of these pedals has a separate page about it, usually with a lot more information about the development of the pedal and the various revisions it went through and the reasons behind certain decisions and so on, but if you’re only interested in building the end result, most of that is unnecessary.

For each of the projects, we provide a PCB and any rare or difficult-to-get parts. We also offer a set of the PCB-mounting pots that the PCBs are designed for, although you can always wire the pots if you prefer. We find board-mounted pots are quicker and less error-prone.

Hard Bargain Distortion

The Hard Bargain is a high gain distortion with an unusual two knob tone control, offering a “Tilt” knob that changes the balance from Bass-heavy to Trebley-bright, and a Mid cut/boost control that can provide a peaky midrange sound or a classic scooped drive sound.

There’s a lengthy article about the design process for the Hard Bargain pedal, but that’s way beyond what you need to know to build it!

Parts you might need

Hard Bargain Build Documents

The only documents you’ll really need are these two:

Here’s front panel graphics for the two different versions (800Hz and 640Hz).

If you fancy doing your own layout or PCB, or just need help debugging the circuit, the schematics are below. I haven’t done a Vero layout, but if you do, do please let me know and I’ll post a link to it here.

FilterFX 12dB/oct Lowpass/Bandpass/Highpass filter

The FilterFX is a synthy, funky multimode filter controlled by the StompLFO chip, which offers eight waveforms and tap tempo or external sync. This is a very versatile pedal that does a lot of unusual stuff. You can even stick an expression pedal into it or feed it a 0-5V CV from a modular synth!

The FilterFX project page has the full details.

Parts you might need

FilterFX Build Documents

The most important document you’ll need is the FilterFX construction guide. The Enclosure drilling template comes in handy later on too.

The full schematic and further details on the PCB for debugging are below:

DigiDelay 4 second tap tempo delay

The DigiDelay is a DIY delay project that offers features well beyond what you’ll see from a PT2399! It has 4 seconds of delay, provides delay trails, has tap tempo, keeps the dry path entirely analog, has high and low tone filter controls, uses a momentary/latching feature on the bypass switch for “echo splashes”, etc etc – it’s got the lot!

The full details are on the DigiDelay project page.

Parts you might need

DigiDelay DIY 4 Second Delay Build Documents

The full schematic and further details on the PCB for debugging are below


Flangelicious Flanger

The Flangelicious comes in two versions: a classic four-knob flanger, and a more experimental multi-waveform flanger. They’re identical apart from the FLANGE chip you use, and both versions can be built with the same PCB with no component changes, and both versions can use either vintage MN3207s or modern V3207s or other clones. You can even build one PCB, and swap FLANGE chips and BBDs back and forth.

The Flangelicious project page has further details.

Parts you might need

Flangelicious Build Documents

As above, here’s the two crucial documents.

The full schematic and further details on the PCB for debugging are below.


Comments and feedback

As always, get in touch if you’ve got any comments or feedback about the pedals. We’d love to hear.


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