Fourth-Order High Pass Filter 741 (CB25597E)

This 100 Hz filter was found in the August 1993 issue of Electronics Now. The components can be modified to operate at other frequencies.

| Clique na imagem para ampliar |

DC Low Level Amplifier (CB6460E)
This circuit was found in a 1965 US documentation. The circuit converts a DC signal to a 400 Hz AC...
Two-lnverter Oscillator I (CIR099E)
Figure below shows the basic configuration of a ringoscillator using CMOS Iogic. The frequency...
Bicycle Alarm (CB4365E)
This circuit was obtained from a 1986 Spanish magazine Resistor. The magazine no longer exists, but...