This electronic Morse Key for telegraph message transmission was found in an American 1980s amateur radio documentation. The circuit uses TTL technology and must be powered by a 5V voltage.
In this charger, the charging current is basically limited by the LEDs. The transformer is a low...
April 2017 - The new RAME027 rotating magnetic absolute encoders with Vishay's displacement sensor are...
We found this circuit in a 1995 documentation. Powered by batteries, it uses a telephone capacitor as a...