The Stepped Tone Generator designed by Forrest M. Mims III, more commonly known as an 'Atari Punk Console' is a lot of fun to play around with; however you can only do so much with it. I built this one with two 556 dual timers, for a Dual Atari Punk Console. This allows you to create more complex sounds, by having each APC tuned to a different frequency. It's also interesting how crosstalk between the two APCs can create very dirty lo-fi sounds. Each of the APCs has it's own volume control in addition to the two potentiometers for the oscillators. This design has a 1/4" TRS socket for connection to nearly all audio equipment. A video of the Dual Atari Punk Console in operation is available on the final step.
Step 1: Parts list
You will need:
- (x4) 470K Potentiometer
- (x2) 100K Potentiometer
- (x6) Potentiometer Knobs
- (x4) 1K 1/4-Watt Carbon Film Resistor
- 120R 1/4-Watt Carbon Film Resistor
- (x2) 10nF Ceramic Capacitor
- (x2) 100nF Ceramic Capacitor
- (x2) 10uF Electrolytic Capacitor
- SPST Toggle Switch
- 1/4" Mono Panel-Mount Audio Jack (or any other audio connector)
- 9V PP3 Battery Snap Connectors
- 9V PP3 Battery
- (x2) 14 pin DIL sockets
- (x2) NE556 Dual Timers
- LED and bezel of your choice
- Various lengths of stranded core wire
- Stripboard (50 holes x 15 tracks)
- Project enclosure (I used a Hammond 1591-D)
Step 2: Stripboard Layout & Schematic
Here is the full layout for the stripboard. The track breaks are marked with an 'x'. I used a stripboard track break tool to do this (it is nothing more than a 4mm drill bit with a handle), although a Stanley knife works just as well. For the off-board components, it is a very good idea to use stranded core wire, as single core will snap fairly easily.
To see the full resolution images, click the little i in the top left of the image. Select 'Original image'