Suggested by Mullard in a1969 documentation, this circuit generates the erasure signal for tape recorders of the time. Transistors can be modern equivalents like BD136 and BD136.
Found in a Motorola documentation from 1965, this circuit consists of an electronic ignition with a...
This circuit indicates the logic level of a digital signal. LEDs can replace the lamp, wired with...
Small variations in the resistance of the subject's skin holding the test leads are detected by...