This circuit was found in the July 1994 issue of Electronics Now magazine. The relay can be rated at up to 12 V and 100 mA. The transistor is a general purpose transistor.
We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994....
This circuit for antiparallel control of thyristors was found in a Philips publication from 1967....
The purpose of this circuit found in a 1995 magazine is to monitor an alarm via telephone. When we...