This circuit was found in an 80's Poptronics. The circuit is a fast trigger whose signal can be taken from the Q2 collector. The supply can be done with voltages from 9 to 12 V.
circuit is used to increase the sensivity of a relay. A 50 to 100 mA relay can be triggered with...
The configuration shown makes use of a simple source and the gain is given by the relationship between R3...
This blinker consists of a simple multivibrator and instead of the lamp, an LED and a 470 ohms...