This circuit was found in a Texas Instruments documentation from the 1980s. The circuit monitors engine temperature by warning of engine warm-up and warning when the fan is on.
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...