555 as an encoder?
From: Rather Play Pinball (123_at_123.net)
Date: 02/01/05
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Date: Mon, 31 Jan 2005 19:54:58 -0500
Have a device with a corded remote control. 3 conductors. Had to take it
apart. Inside, the conductors are labeled +V, Gnd, Signal. The remote is a
6 button job. There's a 555 and a transistor nearby. Lots of resistors
and caps.
So? Any guesses what they send out? A square wave with the number of
pulses to correspond with the button number? A single long pulse with the
width in proportion to the button number?
How would you design it?
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