Enclosure not stated · 1 knob
Electro-Harmonix Signal Pad
Based on the Electro-Harmonix Signal Pad
From the post
With 1000 verified layouts in site, I figured I'd throw in something small, simple, and usable.
From the Source:
The Signal Pad is a passive attenuator that allows you to instantly switch to a different preset volume. It's like your guitar's volume knob, with a fully-passive and color-free circuit. Leave your amp's volume set high for overdrive, and use the Signal Pad to lower your level for a clean sound -- then switch it off to kick in your amp's natural overdrive. You can also experiment with the Signal Pad anywhere in your effects chain -- you'll bring out new tonal combinations from your favorite old pedals.
Basically a simple switchable volume pedal.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 5 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 1 | ||||
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 2 | ||||
| ×1 | 220pF | 220p | read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N4004 | 1N4004 | read from the layout by eye | |
| Potentiometers 1 | ||||
| Volume | A1M | A1M | Potentiometer | read from the layout by eye |