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Lamp / Light Control Circuits
Designed by David A. Johnson, P.E.

Last Updated on: Monday, April 21, 2008 04:19 AM

Master Category List - Dave's Circuits
 

  • 1 WATT FLUORESCENT LAMP NIGHT LIGHT
    If you are tired of replacing small night light lamps, try this circuit. The line powered circuit uses a long life cold cathode fluorescent lamp. A simple charge pump technique runs the lamp without any transformer.

  • 5W FLUORESCENT LAMP INTENSITY MODULATOR
    The circuit was designed to experiment with using small fluorescent lamps as a broad pattern source of modulated light. The circuit hits the small lamp with narrow 1us pulses at a rate of 10KHz. Each pulse launches about 10 watts of visible light. The lamp starting method is a bit crude but the circuit does work.
  • 60 Watt Lamp with Auxiliary 14v LED Lamp
    This circuit controls power to a standard 60 watt lamp plus generates an auxiliary 14v DC supply which can power an automotive style 12 LED array.  (added 7/06)
  • Incandescent Lamp Inrush Current Limiter
    This circuit limits the large inrush current often associated with large incandescent lamps.  With the components shown the current is limited to 1 amp, but it could be scaled to any desired current. (added 7/06)


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