Suggested by a 90s EDN, this circuit supports almost any LED as a source and a phototransistor as a detector. The circuit operates with a PLL 567 at a frequency of around 40 kHz.
The New Microchip development board is targeted to designers who work with 16- and 32-bit PICs....
The circuit shown was found in the February 1994 issue of Electronics Now magazine. The circuit...
The circuit presented is suggested by Mullard (Philips) in an old manual. The circuit uses a...