This circuit uses the LM2931 which is not a common component today. What it does is to activate a lamp causing it to blink at a frequency determined by the capacitor.
.
This low distortion circuit was found in a 1964 Electronic Design. The transistor admits...
This ingenious circuit was found in a 1990s Popular Electronics. The oscillator is a 555 and the...
This short circuit protection circuit accelerates the blown fuse in case of an output overcurrent. The...