This circuit was obtained from a 1978 Practical Wireless. It causes an LED to flash at a frequency that depends on capacitor C1. The PNP transistor can be a BC558 and NPN a BC548 or BC549. The LED is any color.
This circuit was obtained from a 1978 Practical Wireless. It causes an LED to flash at a frequency that depends on capacitor C1. The PNP transistor can be a BC558 and NPN a BC548 or BC549. The LED is any color.
