This circuit was found in the January 1999 issue of Electronics Now magazine. The circuit uses an integrated circuit from the period and has earphone listening.
With a touch of the push button the lamp is switched on. A new touch and the lamp go out, in this...
This circuit produces fast light pulses in na incandescent lamp. Pulse rate is adjusted by P1. The...
We find this TTL configuration in a 1978s documentation. The circuit generates variable pulses...