This circuit is from a 1968s Motorola documentation. The load can range from 10 to 100ohm and the transistor supports a modern equivalent such as 2N2222 or BD135.
This circuit was found in a former Popular Electronics. The timing is given by R1 and C1, R4 and...
We found this circuit in the July 1994 issue of Electronics Now magazine. The circuit can use...
This RCA circuit has current limitation. The circuit is from an ancient American documentation making...