Category Archives: audio amp

Chicago Dynamic Industries Sound Card (EM Gun Games)

A redesign of the Chicago Dynamic Industries “Rifle Ricochet” sound board using modern two layer PCBs, a silkscreen, and modernized components. Uses readily available 2N3904 transistors instead of the EOLed 2N3643 and 2N3644 transistors. The #444-310 board is reproduced with better noise immunity and some extra troubleshooting features. Licensed to fellow Arcade collectors under the TAPR/Non Commercial License. BOM costs are less than $20 with PCBs being ~$23. Continue reading

Posted in Arcade, audio amp, Design, DIY, NCL, PCB, TAPR | Tagged , , , , , , , , , | Leave a comment

Bally (AS-2518) Audio Card tester

Arduino Nano based Pinball Audio Tester w/ opensource code provided. This Audio tester sequences thru the 32 tones in the soundcard PROM at 1.5second intervals allowing debug and adjustments. This Tester should work with any AS-2518 Bally sound card including the -31 and -50 designs. Pinball machines such as the Bally Star Trek and the Paragon. Continue reading

Posted in Arcade, Arduino, audio amp, DIY, Pinball, Star Trek: Mirror Universe Pinball | Tagged , , | Leave a comment

Star Trek Red Alert Audio Trigger

Opamp circuit and PCB licensed under TAPR/NCL Open Hardware License for use on a Sega Star Trek Captain’s Chair Arcade Machine. Simple thruHole componets should allow most people to solder this project over a evening. Circuit used to Simulate the “Red Alert” Lighting during gameplay. Continue reading

Posted in Arcade, audio amp, DIY, NCL, sega, TAPR, vector, Video Game | Tagged , , , , , | Leave a comment

Open Source Sega / Gremlin G80 PSU boardset

A replacement G80 PSU for the Sega/Gremlin G80 Vector machines as a replacment for my Star Trek Captain’s Chair.
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