LIGHT DIMMER

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The 555 timer `light dimmer` schematic circuit is shown in figure 1 below. For the light dimmer to work the 555 timer is configured as a `variable cycle`, astable oscillator running some where around 300 Hz. The power mosfet used here would be a TO-220 type such as MTP3055E or similar. Note the need for a TO-220 type heat sink for full rated loads.If you look back at the tutorial on 555 timers (figure 2a - modified duty cycle in astable operation) you will note the need for Ra and Rb. Cunningly this is provided for in our light dimmer circuit by using a 47K potentiometer (often marked 50K). In visit page.

If you look back at the tutorial on 555 timers (figure 2a - modified duty cycle in astable operation) you will note the need for Ra and Rb. Cunningly this is provided for in our light dimmer circuit by using a 47K potentiometer (often marked 50K). In http://www.electronics-tutorials.com/devices/555-light-dimmer.htm

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