Found in Radio Electronics magazine, May 1987. It triggers a xenon lamp from an inductive sensor. The circuit requires 200 to 400 V DC to operate.
For times in the range of seconds to a few minutes we found this timer with the CK722 in a Radio...
We can use this amplifier with low impedance headphones with good performance. Possible...
Found in a 1964 Electronic Design, this circuit uses transistors from that time. Equivalent...