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


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

Master Category List - Dave's Circuits
Last Updated on: Friday, August 29, 2008 02:34 PM

left1 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.

left5W 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.

12v Light/Dark Lamp Switch
At night, this circuit will route current to a 12v lamp, turning it on. (added 7/06)

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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