The oscillation of the relay causes the applied audio signal to deform and start to resemble the robot voice or computer voice. The effect is adjusted in the trimpot and the power can be 6 or 12 V depending on the relay.
The oscillation of the relay causes the applied audio signal to deform and start to resemble the robot voice or computer voice. The effect is adjusted in the trimpot and the power can be 6 or 12 V depending on the relay.