This circuit was obtained from a 1970s RCA. The circuit uses LDRs as sensors. The resistors depend on the A / D converter used. The circuit can be used as a shield.
Found in Radio Electronics magazine from June 1968, this circuit produces signals from 30 Hz to...
The selected circuit in the Texas Instruments opto-electronics manual works with photoelectric sensors in...
This is a traditional oscillator configuration with the 741 found in a 1980 publication. When...