Found in American documentation from the 1980s, this circuit operates in the frequency range 0.5 to 20 MHz. The power can be between 5 and 15 V.
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...