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 may be modulated by a very low frequency signal, for example to obtain the vibrato...
This “people detector” with pyroelectric sensor was found in the April 1991 issue of Radio...
Using a BA1404 integrated circuit this small FM stereo transmitter was found in a Radio...