Under this name, Electronics Now magazine published this laser projector in its last issue of November 1999 to “freeze” moments and thus determine their speed. The circuit uses a LASER diode.
This circuit emits an audible signal when the mains voltage ceases. The circuit is from a 1973...
We found this circuit in a 1966 RCA manual. The integrated circuit is unusual, and the Triac must...
Short duration pulses or "clicks" can be generated with the circuit seen in the figure. The...