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Digital IR theremin

Thursday, December 13th, 2012

Chris from Pyroelectro developed this all-digital-hardware Theremin. He descibes, "The Digital IR Theremin uses comparators, digital logic, and a single 555 timer for tone generation. When you wave your hand in front of the infrared proximity sensor, it outputs a tone with varying pitch depending on how far away your...

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Recent Comments

  • Pekka Akselin: This is ridiculous!? :-) We are back at 256(!) byte EPROMs that needed multiple, a handful, of voltages to run! :-(
  • KH: Let's try a back-of-envelope calc balancing energies. From MCP1700 datasheet, there are graphs for a 200mA load step. Estimate the energy shortfall as 12uJ. Say...
  • Daniel: It's been a week and my comment is still awaiting moderation. Apparently the CIA doesn't want their involvement known?
  • KH: Agree, so okay, I guess he must have learned from somewhere. 100nF and 1000uF is so far apart, that was jarring; it's more magic incantation...
  • Max: I have a suspicion the hefty electrolytic cap might be some sort of cargo cult carry-over from other RF-based projects - for instance, I've seen...