Categories

Simple optical theremin

Posted on Friday, May 4th, 2012 in how-to by the machinegeek

Here’s a simple theremin-like device designed by Sacred and presented by Jameco. Unlike other theremins which vary the sound based on the user’s proximity to stationary antennae, this project uses two phototransistors and a 555 timer. The theory of operation is the variation of the sound based upon the amount of IR light reflected by the user’s hand. The article contains the schematic and BOM (conveniently keyed to Jameco part numbers, of course.)

Instructables via Jameco.

This entry was posted on Friday, May 4th, 2012 at 3:00 pm and is filed under how-to. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

2 Responses to “Simple optical theremin”

  1. solipso says:

    ThereI’m or thereMIN?

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • DP.: fixed, thanks
  • Bovine: Title of article has the wrong number for ESP8266 typed.
  • burkm m: It drifting even further using that standard XO...
  • langwadt: a HC14 is a bad choice for an xtal oscillator, the unbuffered non-Schmitt trigger HCU04 is much better for that application
  • Bill F: I'm ready for one!