This is a small, simplified clone of the Death by Audio Robot guitar pedal, stripped down to be installed in toys/keyboards as a mod.
- Can Connect Pin 3 of Control Pot to Ground via a Capacitor (~47nF) to mod the control
- Has an optional PWM LED connection that changes LED brightness to correspond to input volume.
- Add a Wet/Dry Control by Attaching a 100K Lin pot to:
- Clean/Effect Input (pin 1)
- Output Jack/Speaker (pin 2)
- Effect Output (pin 3)
(Asterisked parts only needed if you use the indicator LED)
- HT8950 (the DIP 18 version, not the 8950A DIP 16 one)
- 500k Linear Potentiometer
- Switches x 3 (if using switches to set mode)
- Momentary Buttons (normally open) x 4 (if using buttons to set mode)
- *LED (pretty much any kind you like will work I expect)
- 100nF film (or ceramic) capacitor x 3
- 100uF electrolytic capacitor (any voltage rating I know of will work, but say 6 volts just to be specific)
- 10uf electrolytic capacitor
- Resistors:
- *220R (the IC's datasheet doesn't include this resistor, I just can't bring myself to put in an LED without a resistor. You'd probably be fine just to jumper this, or pop in any value between 100R and 1k, I just have a ton of 220Rs and can confirm this value works great)
- 4.7k x 3
- 470R x 2
- 100k