The maximum frequency of this circuit is 500 kHz. We found it in a documentation for radio amateurs from the 1980s. The integrated circuit used is uncommon today.
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...