Simple Timer Using the 555 (MSB123E)
- Category: Timers and Triggers
- Published: Thursday, 25 February 2016 00:00
- Written by Newton C. Braga
- Hits: 744
This simple timer can be used in many applications such as egg timer. The LED glows up when S1 is closed by a moment remaining on by a time interval that depends on C1 and R2/R3; Time up to some minutes can be reached with larger Capacitors. Values up to 1,000 µF can be used. The circuit can be powered from 5 to 12 V supplies.