We found this configuration in a 1990 Poptronics. The circuit can be powered by voltages between 6 and 15 V, changing the resistors in series with the LED. The frequency is set at R7.
The circuit shown is from an optoelectronics manual by Texas Instrruments. The bipolar can be u...
This traditional flasher configuration with two transistors drives 5 LEDs with a supply that must...
We found this CMOS circuit for excitation of a relay in an old documentation. The transistor is a...