This circuit is from a 1977 Signetics integrated circuit manual. The output transistors can be BD136 and BD237 and the symmetrical supply can be from 6 to 12 V. The voltage gain is 10.
We found this circuit in a Poptronics of the 90s. The circuit operates from 100 kHz to 30 MHz and...
Found in a 90’s Popular Electronics, this circuit can use other power MOSFETs. The transformer has a...
The critical component of this alarm, obtained in an old publication from 1976, is the sensor. The Triac...