This circuit will trigger an audible warning signal after the end of the pre-programmed timing. Using the potentiometer, the time delay must be set. SW1 turns on and the LED lights up, indicating that the circuit is working. After the time chosen in the pre-programming, there will be an audible signal that will sound 3 times per second controlled by a blinking LED. To deactivate the circuit, SW1 is switched off. The time can be adjusted between 1 minute and approximately 1 hour. One can mount one shown around the potentiometer to facilitate time adjustment.
| Clique na imagem para ampliar |
