Found in an Electronic Design of 1964, this circuit operates with control voltages from 0 to 12 V determining the duration of the pulses.
The flashing LEDs in this circuit simulate a working alarm and can serve as a deterrent to a...
This circuit is from an April 2000 Poptronics. The magazine no longer exists, but the circuit can...
Found in a Popular Electronics from the 90s, this circuit presents the difficulty of obtaining the...