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.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
This circuit was found in the March 1995 issue of Electronics Now magazine. The circuit requires a...
This receiver was found in a documentation by Gernsback from 1960. The circuit uses high impedance...