300 to 3,000 Hz Speech Filter (CB6543E)

Found on an 80's Radio Electronics, this two-section circuit is designed to pass the frequency range of the human voice.

| Clique na imagem para ampliar |

Small Inverter (CB11943E)
This traditional configuration can provide high voltages for an electric fence, for science...
2 to 24 kHz Low Pass Filter 741 (CB16756E)
We found this filter configuration in an old documentation. It is one of many possible ones that...
Conductivity Meter (CB13503E)
This circuit measures the conductivity of a saline solution, which is affected by the electrolysis effect....