Found in an American magazine from 1968, this circuit produces pulses free of bounces on its output. The integrated is of DTL logic, no longer used today.
This circuit can be used as a shield as long as the power is supplied with voltage equal to that...
This simple megaphone is from old documentation, but uses still current components. The circuit is...
This simple telephone amplifier can be used as an auxiliary amplifier for additional listening, without...