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Lamp / Light
Control Circuits Page 7 Lamp Controls:
#'sAB-C DE-FG-KLM-NP-RST-UV-Z Last Updated on:
Monday, October 03, 2011 06:08 PM
Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
Lamp Dimmer (Stepan Novotill) - This must generate an awfull lot
of RFI without a choke! The house wiring supplies the di/dt limiting.
This is a CHEAP design which exhibits hysterisys at dim settings. Not
everything made and sold to the public is top notch….. [Reverse engineered
schematic by Stepan Novotill]
Lantern Flasher/Dimmer - The electronic lantern control circuit
adds high-efficiency dimming and flashing to an existing battery-powered
lantern or flashlight or to a custom design. For the car it makes a
great lamp for changing a flat tire, back seat reading or emergency engine
work. The flasher mode..... [Tony van Roon's circuit]
Lantern Flasher/Dimmer (techlib) - The electronic lantern
control circuit (fig. 1) adds high-efficiency dimming and flashing to an
existing battery-powered lantern or flashlight or to a custom design. For
the car it makes a great lamp for changing a flat tire, back seat reading
or emergency engine work. The flasher mode is useful for warning other
drivers.....(circuit / schematic design added 6/06)
Lantern Flasher/Dimmer (tomzi.geo) - Basically a high-efficiency dimmer, but
can also be used as a flasher. In dimmer mode, the LM358 (dual op-amp) is wired to
send pulses at a constant frequency. By adjusting the width of these pulses,
brightness of the bulb is controlled. In flasher mode, the same potentiometer is used
to control the frequency, from about 1 to 20 flashes per second.....(circuit /
schematic added 2/03)
Laser Pointer Train Detector - This train detector makes use of hand held
laser pointer devices that are widely available to detect trains over long distances.
[from Rob Paisley's Model Train web site]
LED Buck PFM - This is a proof of concept circuit which needs improvement.
The part values shown will run a high efficiency red LED with a Vf of 1.9V from only 2
nicads, right down to 2 volts. For a white LED you will need more batteries and you
must increase the 1.0K resistor to a higher value. Current sensing at a mere.....
[Circuit by Stepan Novotill]
LED Dimmer Circuit - Find out how to put together a simple but efficient PWM
dimmer circuit for LEDs…. [REUK - Renewable Energy UK website]
LED dimmer uses only two lines - 21-Mar-02 Issue of EDN The circuit in
Figure 1provides 32 steps of brightness control-from 0 to 100%-for a backlight or
instrument panel, using just two general-purpose-microprocessor signals. In addition,
the circuit requires little board space, because it uses only three SOT-23s and one
µMax package..... [Design Idea by Jerry Wasinger, WallyWare Inc, Norcross, GA]
