- Published in issue 12/1999 on page 0
The timer was designed for switching off a battery charger after a predetermined time to avoid overcharging. It may, however, be used for a number of other applications. It may be switched off before the predetermined time has elapsed and may later be retriggered by a simple push-button switch, S1. The circuit does not need any special components or parts. In the quiescent state, current drain is negligible.