Found in a 1993 Electronics Experimenter Handbook, this circuit uses a multimeter to measure capacitance. The circuit is powered by 12 V.
This circuit with integrated TTL 7400 has a good teaching purpose, drawing one of two LEDs. The...
The preamplifier using JFET presets a high input impedance and very low distortion. The input...
The figure shows how to generate a sinusoidal signal using 4 flip-flops. The circuit is from a...