This amplifier was found in a 1957 Rayrtheon documentation. The circuit can be fitted with a BC558 transistor. Driver and output transformers can be obtained from unused transistor radios.
This circuit is from 1968 American medical documentation. The circuit generates pulses of...
The circuit we showed was obtained from our publication on relays and makes use of any...
This siren configuration using the 555 has already been explored in other circuits on this site. In...