In the figure we have a good rectangular signals generator with several frequency bands. The circuit is based on old logic but can be implemented with modern equivalents.
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...