This circuit produces pulses of 90 V at intervals that can reach 5 minutes. The circuit is from a 1969s Electronic Design.
This circuit is from 1988 documentation. It uses a range of 30 LEDs driven by 4017 integrated...
This circuit was found in Electronics Now, it can be used with universal phones on a common...
Delivering Over 4X More Battery Life and Faster Time to Market, Platform Comes Complete with...