This circuit was found in an Electronic Design. It makes use of a relaxation oscillator to trigger an SCR and two relays. The circuit operates at frequencies of 12 to 180 cycles per minute.
January 2017 - The new Honeywell RSC TruStability ™ pressure sensor mounting board is available from...
Found in Popular Electronics from the 90s, this circuit uses a 2N2646 and a general-purpose transistor...
This circuit was found in a 90s Hands-on Electronics. The transistor can be a BC548. What it does...