This blinker for LEDs up to 500 mA was found in General Electric documentation from 1970. Transistors can be replaced with current equivalent types.
This old oscillator using germanium transistors has a high impedance headphone as inductor to...
The double T of this circuit makes it amplify only the 1 kHz signals. The circuit can be used as a...
This oscillator can produce 2 to 10 MHz signals depending on the coils used. The transistors can...