This circuit was found in a 1968 Motorola documentation. The circuit can be implemented with virtually any photo transistor and general-purpose transistor.
This circuit can be enabled and disabled by a TTL signal. The relay is a low current reed type and...
This circuit produces fast light pulses in na incandescent lamp. Pulse rate is adjusted by P1. The...
This circuit was found in an 80's Radio Electronics. The circuit makes use of general purpose...