This circuit, from an old publication, can also use modern transistors. Note that the unit is double with a 4.5 V branch (3 batteries) and another 1.5 V branch (1 batteries). This configuration is necessary for the type of polarization that is used. The frequency of the generated sinusoidal signal is approximately 1 kHz, depending basically on the shock.
| Clique na imagem para ampliar |
