Square wave generator 555 (CB9098E)

This interesting circuit was found in an 80's Electronic Engineering. The circuit has a 50% active cycle. R and C determine the generated frequency.

| Clique na imagem para ampliar |

Regulator from 0 to 25 V x 1 A (CB1193E)
The advantage of this circuit lies in the fact that it does not need a negative source to generate...
Audio generator 741 (CB8643E)
This simple audio generator with the 741 was found in a 90sTexas Instruments. The circuit...
Pre For Low Impedance Microphone (CB12870E)
With this circuit from an old 1973 publication it is possible to use a small speaker as a...