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The
▲[[Image:APC with 2 555 (pin out) and bridge added.png|thumb|400px|Circuit diagram of an implementation of Atari Punk Console]]
The '''Atari Punk Console''' (commonly shortened to APC) is a popular circuit that utilizes two [[555 timer IC]]s or a single 556 dual timer IC. The original circuit, called a "Sound Synthesizer", was published in a Radio Shack booklet: "Engineer's Notebook: Integrated Circuit Applications" in 1980<ref name="Engineea_Notebook_Integrated_Circuit_Applications">{{cite web |url=http://www.jameco.com/jameco/pressroom/punk.html |title=Engineer's Notebook: Integrated Circuit Applications |publisher=Jameco |accessdate=13 September 2014}}</ref> and later called "Stepped Tone Generator" in "Engineer's Mini-Notebook - 555 Circuits" by its designer, [[Forrest M. Mims III]] (Siliconcepts, 1984).<ref name="Engineers_Mini-Notebook">{{cite web |url=http://feenelcaos.org/wp-content/upload/Forrest-Mims-engineers-mini-notebook-555-timer-circuits-ra.pdf |title=Engineer's Mini-Notebook |publisher=Radio Shack |format=PDF |accessdate=13 September 2014 | archiveurl=https://web.archive.org/web/20130822030621/http://feenelcaos.org/wp-content/upload/Forrest-Mims-engineers-mini-notebook-555-timer-circuits-ra.pdf | archivedate=22 August 2013}}</ref> It was named "Atari Punk Console" (APC) by Kaustic Machines crew because its "low-fi" sounds resemble classic [[Atari]] console games from the 1980s, with a square wave output similar to the [[Atari 2600]]. Kaustic Machines added a -4db line level output to the circuit which was originally designed to drive a small 8-ohm speaker.▼
== History ==
Atari Punk console is an astable square wave [[oscillator]] driving a monostable [[oscillator]] that creates a single (square) pulse. There are two controls, one for the frequency of the [[oscillator]] and one to control the volume. The controls are usually [[potentiometers]] but the circuit can also be controlled by light, temperature, pressure etc. by replacing a potentiometer with a suitable sensor (e.g., photo resistor for light sensitivity). Most of the time there is also a power switch (often a toggle switch) and a volume knob.▼
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▲The circuit is a simple [[DIY]] noisemaker circuit that is relatively inexpensive and easy to build, easily adaptable and is configurable in many ways. It has been built into a wide variety of cases, from metal [[IKEA]] bowls to light bulbs, an old Atari mouse or joystick. Its flexibility has led to wide scale popularity among electronics enthusiasts. It is often suggested as a good circuit to build for beginners.
==
▲Atari Punk console is an astable square wave [[oscillator]] driving a monostable
==
With a pot turned down to minimum, because internally the 555 shorts pin 7 to ground during parts of the oscillation, there will be a short circuit across the battery. There's needs to be something to limit the current through the pots and pin 7. Add a series resistor to each of the pots, e.g. 330 Ohms at 9 Volts will limit the power to just under a 1/4 Watt, (the rating of most pots). This will affect the frequency of the oscillator so you may have to experiment with higher value resistors.<ref>[https://www.diystompboxes.com/smfforum/index.php?topic=65396.0 Atari Punk Console - Sparking Pots?], DIYstompboxes.com</ref><ref>[https://www.diystompboxes.com/smfforum/index.php?topic=71808.0 Help! APC B1M pot catching fire!!], DIYstompboxes.com</ref><ref>[https://electronics.stackexchange.com/questions/102592/problems-with-atari-punk-console-circuit Problems with Atari Punk Console circuit], Electrical Engineering Stack Exchange</ref>
== References ==
{{From Wikipedia|Atari_Punk_Console|30 June 2019}}
{{Reflist}}
== External links ==
* ''[https://www.jameco.com/Jameco/workshop/diy/atari-punk-console.html Making Music with an Atari Punk Console]'' by Forrest M. Mims III, Jameco
* [http://compiler.kaustic.net/machines/apc.html Kaustic Machines]
* [http://www.forrestmims.org/ Forrest M. Mims III] web page
* [http://recompas.com/portfolio/the-voice-of-saturn-synthesizer-mk-i/ Voice of Saturn Synthesizer MK I], based on the APC and uses a vactrol for voltage control.
* [https://www.instructables.com/id/Voltage-Controlable-Atari-Punk-Console/ Atari Punk Console], Instructables, with voltage control
* [https://lushprojects.com/apc/lushprojects-atari-punk-console.pdf Atari Punk Console kit build instructions], lushprojects.com. Uses stripboard and includes helpful basic electronic background info.
* [http://fritzing.org/projects/atari-punk-console-aka-the-stepped-tone-generator Atari Punk Console a.k.a The Stepped Tone], [[Fritzing]]
* [http://fritzing.org/projects/atari-punk-console-with-cv-inpus Atari Punk Console with CV inpus], Fritzing
* [https://web.archive.org/web/20201016203932/https://sites.google.com/a/berklee.edu/jmdblog-491/customization/fmsynthesizerwithtwo555chips FM synthesizer with two 555 Chips] by Juan M Delgado - archived
=== Kits and PCBs ===
* [https://web.archive.org/web/20190717185235/https://www.emizinstruments.com/sdiy/atari-punk-console-p-57.html?language=en eMiZ Instruments]
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