This circuit is from the time when cars used contact breakers. This 80's version measures the dwell angle of the contact breaker for dwell adjustment using an era integrated circuit, the LM3917.
This circuit uses a common digital clock to activate a relay at a programmed time. The circuit takes...
This simple circuit activates an alarm (buzzer) when the sensor, made up of two plates separated by...
This circuit has its frequency controlled by a 1MHz crystal. The circuit must be powered by a...