125B · 1 knob
Indifferent Snowman
From the vendor
Overdrive
Indifferent Snowman is an overdrive pedal derived from an early experiment with op amp overdrives that had some happy accidents in the build. It's been a favorite around God City Studio and now is an easy DIY build.
Sale is for PCB only. You must source the components and build the pedal yourself. To make foot switch wiring easier, we also suggest you buy the 3pdt utility switch.
Build documentation can be found here below. Please read before purchasing.
Indifferent Snowman Build Guide
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NOT FOR COMMERCIAL USE
Schematic
The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 40 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 16 | ||||
| CLR | 4.7k | 4.7k | 1/4 watt resistor 1k-10k Affects LED b | rightness |
| R6 | 4.7k | 4.7k | 1/4 watt resistor 220R - 5.1k Lower values | increase output volume. |
| R1 | 10k | 10k | 1/4 watt resistor | |
| R2 | 10k | 10k | 1/4 watt resistor | |
| R11 | 10k | 10k | 1/4 watt resistor | |
| R12 | 10k | 10k | 1/4 watt resistor | |
| R3 | 1M | 1M | 1/4 watt resistor | 470k-2.2M |
| R5 | 1M | 1M | 1/4 watt resistor | 470k-2.2M |
| R4 | 1k | 1k | 1/4 watt resistor | |
| R7 | 5.1k | 5.1k | 1/4 watt resistor | |
| R8 | 2.2M | 2.2M | 1/4 watt resistor | |
| R9 | 2.2M | 2.2M | 1/4 watt resistor | |
| R10 | 3.3k | 3.3k | 1/4 watt resistor Forms HPF wit | h C3. mbre of overdrive and gain |
| R13 | 33k | 33k | 1/4 watt resistor 22k-100k Determines am | ount of gain of second stage |
| R14 | 1k | 1k | 1/4 watt resistor Forms voltage divider with R15 Increase valu | e to decrease output volume |
| R15 | 100k | 100k | 1/4 watt resistor Forms voltage divider with R14 Decrease valu | e to decrease output volume |
| Capacitors 9 | ||||
| C1 | 100u | 100u | Electrolytic capacitor | 47u Power filtering |
| C2 | 100u | 100u | Electrolytic capacitor | 47u Power filtering |
| C3 | 47n | 47n | Film capacitor 22n -100n Forms HPF wit | h R10. mbre of overdrive |
| C4 | 22n | 22n | Film capacitor 10n-47n Input cap | |
| C5 | 10u | 10u | Electrolytic capacitor | |
| C6 | 390p | 390p | Ceramic capacitor 220p-1n Mellow out ov | erdrive with larger values |
| C7 | 1n | 1n | Film capacitor | |
| C8 | 1u | 1u | Film capacitor | |
| C9 | 100n | 100n | Film capacitor | |
| Diodes 5 | ||||
| Z1 | 1N4739a | 1N4739A / 9V1 | Zener diode | |
| D1 | 1n4148 | 1N4148 | Small signal diode | 1n401, 1n34a, LED, etc. Soft clipping diodes |
| D2 | 1n4148 | 1N4148 | Small signal diode | 1n401, 1n34a, LED, etc. Soft clipping diodes |
| D3 | 1n4148 | 1N4148 | Small signal diode | 1n401, 1n34a, LED, etc. Soft clipping diodes |
| D4 | 1n5818 | 1N5818 | Schottky diode 1n4001 Protection di | ode |
| Transistors 1 | ||||
| Q1 | BS170 | BS170 | N-Chan Mosfet TO-92 | |
| ICs 1 | ||||
| IC1 | RC4558 | RC4558 | DIP-08 dual op-amp MC1458, TL072, etc. | |
| Potentiometers 1 | ||||
| DRIVE | A500k | A500k | 16mm potentiometer A250k-A1M Determines am | ount of gain of first stage |
| Switches 1 | ||||
| S | Pad | PAD | Send to PCB | |
| LEDs 3 | ||||
| LED | L1 | L1 | 3mm LED | |
| L+ | Pad | PAD | LED + | |
| L- | Pad | PAD | LED - | |
| Other 3 | ||||
| R | Pad | PAD | Return from PCB | |
| V | Pad | PAD | 9V input | |
| G | Pad | PAD | Ground | |