Two-Range Timer with 555 (CB25746E)

Details
Written by: Newton C. Braga

 

This 10-minute timer was found in the July 1994 Radio Electronics magazine. The relay must be sensitive to the supply voltage used. The capacitors determine time ranges.

 


| Clique na imagem para ampliar |

 

 

  

Latest

Circuit Bench

  • 741 RC Oscillator (CB19350E)

      This oscillator circuit for sinusoidal audio signals with operational 741 requires a symmetrical power...

  • Darlington Logic Tester (CB13786E)

      Found in a 1974 Radio Shack documentation. This circuit must have a connection to the ground of...

  • Pole finder (CB5950E)

           This sensitive circuit detects the live pole of a power grid or outlet. The circuit makes use of a high...

Buscador de Datasheets


N° de Componente