9 V Battery Tester and Cell (CB15087E)

Details
Written by: Newton C. Braga

 

If the battery is good, the LED flashes. This simple tester uses an LM3909 integrated circuit. We found this configuration in an old documentation.

 


| Clique na imagem para ampliar |

 

 

 

  

Latest

Circuit Bench

  • Capacimeter (CB4472E)

           This circuit is suitable for testing motor starting capacitors. Capacitors from 2 to 8 uF are...

  • Wien Bridge Oscillator (CB13964E)

      The circuit shown is from an old English publication from 1965. We can adapt the circuit to work...

  • Megaphone (CB12607E)

      This circuit, from a 1978 publication, can be made with more modern transistors such as the TIP42,...

Buscador de Datasheets


N° de Componente