Suggested by a Philips documentation from 1970, this circuit uses period components, operating at 50 Hz. The current consumed is 10 A and the input voltage is 12 V.
This circuit was found in Sgnetics documentation from the 80's. The circuit also has loudness...
The SLB0686A integrated circuit used in this application is not currently common. The circuit is...
We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has...