Rain alarm (CB6955E)

Details
Written by: Newton C. Braga

 

     The sensor of this circuit found in Popular Electronics can be formed by a piece of fabric between two bare wire screens. When wet, the fabric will pass the current between the screens, triggering the alarm.

 


| Clique na imagem para ampliar |

 

 

  

Latest

Circuit Bench

  • High Pass Filter (CB6240E)

          This National Semiconductor circuit appears elsewhere on this site. The circuit must be powered by...

  • Blocking Oscillator (CB19576E)

      In this circuit the frequency is determined by the coil and the variable capacitor. Transistors like the...

  • VHF Modulator (CB5365E)

          This circuit is from old American documentation, but the transistor used is still very common...

Buscador de Datasheets


N° de Componente