This circuit was obtained in an old documentation, but it is still current by the used components. The circuit must be powered by a 12 V regulated power source.
Found in a 90s Popular Electronics, this circuit uses a MAR-X to amplify signals up to 2 GHz. The...
The basis of this circuit is a CA3130 operational amplifier. The transistor can be BC548, and the...
This sound relay, Vox or acoustic switch has a bistable action triggering a relay when the...