Graphic equalizer KA2223 (CB25943E)

This circuit was found in a Radio Electronics from April 1990. The circuit has 5 equalization bands given by the capacitors used.

| Clique na imagem para ampliar |

SWR meter (CB7063E)
Standing wave ratio or SWR is an important measure of whether all power from a transmitter is being...
Adding Reset to a CMOS Monostable (CB128E)
Here we show how to add a reset key to the monostable using two NAND gates (CB127E). When the key...
Portable MW Transmitter (CB18515E)
This short-range circuit can act as a wireless microphone. We got the schematic and the printed...