This circuit was found in a Philips documentation from 1966. The circuit provides 1 mW with a power supply of only 1.3 V. Transistors support current BC series equivalents.
This second-order filter was found in American documentation and can be applied to almost any...
This circuit generates the sound of bells. We found it in a 1977 Radio Shack publication. The...
The circuit shown in the figure can be used to detect the operation of infrared sources whose...