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Light Dimmer Circuits
Light Dimmer Circuits:  #'s - K     L - Z

 

Last Updated: December 31, 2017 06:50 AM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

C implements Pushbutton Light Dimmers -  06/18/98 EDN-Design Ideas - A project required building a synchronous-demodulator circuit to track a line drawn on paper.  beauty of  synchronous-modulator/demodulator approach is its inherent noise rejection.  File contains several circuits, scroll to find this one __ Circuit Design  by William Grill, Riverhead Systems, Littleton, CO

1.5 Hour Lamp Fader (Sunset Lamp) -  The sunset lamp comes on at full brightness and then slowly fades out over 1.5 hours time and stays off until power is recycled.   __ Designed by Bill Bowden

12 Volt Lamp Dimmer (using a pot) -  Here is a 12 volt / 2 amp lamp dimmer that can be used to dim a standard 25 watt automobile brake or backup bulb by controlling the duty cycle of a astable 555 timer oscillator.  When the wiper of the potentiometer is at the uppermost position, the capacitor will charge quickly through both 1K resistor __ Designed by Bill Bowden

12 Volt Lamp Fader (LEDs or incandescent) -  This circuit is similar to the "Fading Red Eyes" circuit (in the LED section) used to fade a pair of red LEDs.  In this version, the lamps are faded by varying the duty cycle so that higher power incandescent lamps can be used without much power loss.  The switching waveform is generated by comparing two linear ramps  __ Designed by Bill Bowden

120 VAC Lamp Dimmer -  The full wave phase control circuit below was found in a RCA power circuits book from 1969.  The load is placed in series with the AC line and the four diodes provide a full wave rectified voltage to the anode of a SCR.  Two small signal transistors are connected in a switch configuration so that when the voltage on the 2.2uF __ Designed by Bill Bowden

120 Volt AC Lamp Dimmer Full Wave SCR -  The full wave phase control circuit below was found in a RCA power circuits book from 1969.  The load is placed in series with the AC line and the four diodes provide a full wave rectified voltage to the anode of a SCR.  Two small signal transistors are connected in a switch configuration so that when the voltage on the 2.2uF capacitor reaches about 8 volts, the transistors will switch on and discharge the capacitor through the SCR gate causing it to begin conducting.  The time delay from the beginning of each half cycle to the point where the SCR switches on is controlled by the 50K resistor which adjusts the time required for the 2uF capacitor to charge to 8 volts.  As the resistance is reduced, the time is reduced and the SCR will conduct earlier during each half cycle which applies a greater average voltage across the load.  With the resistance set to minimum the SCR will trigger when the voltage rises to about 40 volts or 15 degrees into the cycle.   __ Designed by Bill Bowden

12v Light Dimmer V2 -  This version controls lights, LEDs and even motors with only 10 components - up to 50W __ Contact P. Townshend - EduTek Ltd

14 Volt Lamp Dimmer (using a pot) -  Here is a 12 volt / 2 amp lamp dimmer that can be used to dim a standard 25 watt automobile brake or backup bulb by controlling the duty cycle of a astable 555 timer oscillator.  When the wiper of the potentiometer is at the uppermost position, the capacitor will charge quickly through both 1K resistor __ Designed by Bill Bowden

230 Volt Dimmer -  Find out how to put together a simple but efficient PWM dimmer circuit for LEDs.   __ Designed by REUK-Renewable Energy UK website

2-wire DC Lamp Dimmer replaces Rheostats -  10/23/97 EDN-Design Ideas - Originally for use in commercial trucks, a low-cost dc lamp dimmer (Figure 1) can control more than 100W of incandescent panel lighting and replaces a high-power rheostat, whose heating darkensinstrument panel.   __ Circuit Design  by Kevan O'Meara, KO Systems, Chatsworth, CA

5 Channel Dimmer Rack -  Note: This document describes my light dimmer project I have made.  This document is not ment to be a full construction project and it might lack some details.  The document is designed as an example those who might think to design and build their own dimmer circuit.  If you are plannign to take such project then I must warn you that you must know quite a bit of safetu issues before even thinking of building this kind of device which is connected directly to mains and controls lots of power (mistakes might mean electrical safety and fire safety dangers).   __ Designed by Tomi Engdahl

A Ballast that can Be Dimmed from a Domestic Phase Cut Dimmer. -  A system has now been developed, based aroundIR2156, whereballast is able to operate with minimal flicker over a considerable portion ofadjustment range of a dimmer andlight output may be controlled over this range from maximum output down to around 10%.  __ 

Addressable DALI Dimming Ballast -  A digitally addressable digital dimming ballast has been developed.  It conforms to DALI standard requiring very few parts and operates at very low power.  Applications include building management or studio lighting where it is desired to control single or groups of lamps for conserving energy, performing lamp maintenance or creating prefect light quality.  The design includes the digital dimming ballast, the code of the micro-controller and a platform to control the ballast by PC.   __ Designed by Cecilia Contenti and Tom Ribarich Applications Engineer, International Rectifier, Lighting Group

Automatic Single-Channel Light Dimmer -  It's fully automatic, has a host of features and will drive incandescent lamp loads up to 2400W.__ SiliconChip

Automatic Single-Channel Light Dimmer-Part 2 -  Second (and final) article has all the construction and setup details.__ SiliconChip

Ballast that can Be Dimmed from a Domestic Phase Cut Dimmer. -  A system has now been developed, based aroundIR2156, whereballast is able to operate with minimal flicker over a considerable portion ofadjustment range of a dimmer andlight output may be controlled over this range from maximum output down to around 10%.  __ 

Basic optimizes PhotoTransistor Bandwidth -  04/09/98 EDN-Design Ideas - (File contains multiple circuits.  Scroll to find this one) A simple circuit can improve the dynamic performance of a phototransistor for use in low- to medium-speed applications as fast as 100 kbps, such as optical isolation of an RS-232C serial line (Figure 1).  In low-cost applicationscontains many circuits, scroll to this one __ Circuit Design  by David Magliocco, CDPI, Scientrier, France

Control Room Light Intensity Digitally -  11-Nov-04 EDN-Design Ideas - Many people favor different light and temperature settings for different rooms depending upon their mood or whether they are working or relaxing.  The circuit in Figure 1 controls the intensity of the artificial light in a room and  __ Circuit Design     by Donal McNamara and Kieran Kelly Analog Devices, Limerick, Ireland

Digital Dimming DALI Ballast for 32w/T8 110V Input -  This reference design is a high efficiency, high power factor, digital dimming electronic ballast designed to drive rapid start fluorescent lamp types.  The design contains an active power factor correction circuit for universal voltage input as well as a ballast control circuit using the IR21592.  The design also includes a PIC16F628 microcontroller and an isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).  __ 

Digital Dimming DALI Ballast for 36w/T8 220V Input -  This reference design is a high efficiency, high power factor, digital dimming electronic ballast designed to drive rapid start fluorescent lamp types.  The design contains an active power factor correction circuit for universal voltage input as well as a ballast control circuit using the IR21592.  The design also includes a PIC16F628 microcontroller and an isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).  __ 

Digitally Addressable DALI Dimming Ballast -  A digitally addressable digital dimming ballast has been developed.  It conforms to DALI standard requiring very few parts and operates at very low power.  Applications include building management or studio lighting where it is desired to control single or groups of lamps for conserving energy, performing lamp maintenance or creating prefect light quality.  The design includes the digital dimming ballast, the code of the micro-controller and a platform to control the ballast by PC.   __ Designed by Cecilia Contenti and Tom Ribarich Applications Engineer, International Rectifier, Lighting Group

Digitally Control Room Light Intensity -  11-Nov-04 EDN-Design Ideas - Many people favor different light and temperature settings for different rooms depending upon their mood or whether they are working or relaxing.  The circuit in Figure 1 controls the intensity of the artificial light in a room and  __ Circuit Design  by Donal McNamara and Kieran Kelly, Analog Devices, Limerick, Ireland

Dimmable LED Desk Lamp -  30-Nov-12 -Design News:   Andrew Morris designed a dimmable LED driver circuit that is simple and energy efficient.  He then installed the circuit into a portable fluorescent lamp. __ Designed by Andrew R. Morris, Gadget Freak-Case #230

Dimmer Switch -  The following circuit is a simple circuit layout for a light dimmer constructed with basic electronic components.  The light dimmer circuit is built using components such as diodes, resistors, wires and capacitors.  The main principle in the working of a dimming circuit is to charge the capacitor first using the power source and then let the capacitor discharge slowly.  This makes sure that the wattage is decreased at the source to which the lighting dimmer is attached.  __ Lighting Unlimited Company

Dimmer/Motor Speed Control -  Lamp dimmers using traics can be quite simple,   nothing more than a potentiometer, resistor, capacitor and TRIAC with a built-in diac. (See Teccor's App Note for examples and other technical data.) The circuit below is similar __  Contact: Charles Wenzel of Wenzel Associates, Inc.

Dimming DALI Ballast for 32w/T8 110V Input -  This reference design is a high efficiency, high power factor, digital dimming electronic ballast designed to drive rapid start fluorescent lamp types.  The design contains an active power factor correction circuit for universal voltage input as well as a ballast control circuit using the IR21592.  The design also includes a PIC16F628 microcontroller and an isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).  __ 

Dimming DALI Ballast for 36w/T8 220V Input -  This reference design is a high efficiency, high power factor, digital dimming electronic ballast designed to drive rapid start fluorescent lamp types.  The design contains an active power factor correction circuit for universal voltage input as well as a ballast control circuit using the IR21592.  The design also includes a PIC16F628 microcontroller and an isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).  __ 

Dome Lamp Dimmer -  A reading light inside the car greatly assists passengers during night, but often the interior dome lamp is too bright and distracting to the driver.  A linear regulator such as a...__ Electronics Projects for You

Dome Lamp Dimmer -  This unique circuit makes your dome light look cool.  Usually when the car door is closed, the dome light just goes OFF.  With this circuit, you can have our dome light fade slowly.   __  Contact: Charles Wenzel of Wenzel Associates, Inc.

Dome light dimmer (with Delay) -  For all you guys out there that want a fading dome light (aka courtesy light aka theatre lighting) without having to pay for one, you can build your own.  I have attached the schematics and you can build it for a few bucks given that you don't have any spare components lying around otherwise it can cost you absolutely nothing.  Of course you can rip some parts from your TV, CD player, radio, etc.  , but I'm not responsible for the damage you cause this way [b:e43bc460fa]The way it works[/b:e43bc460fa] I won't bother you with technical__ 

Dome Light Extender -  There are countless dome light extenders on the Net and in magazines, but most of them suffer from one problem complexity.  Ok, they are not actually complex, but most are far more complex than they need to be.  Some are completely over the top, and require additional car wiring, a PCB, ICs, trimpots and lots of other stuff, while others seem to be someone's untested idea or maybe just a brain fart - some circuits I saw will never work.  My goal was extreme simplicity, and I think that has been achieved.   __ Designed by Rod Elliott  ESP

Electric Power Controller -  suitable as dimmer for 100-Volt lamp up to1200W __ Designed by Seiichi Inoue

Experimental Cross Fader -  ideas to modify simple rotary light dimmers to make a cross-fader__ 

Flasher/Dimmer Lantern -  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 __ Designed by Tony van Roon  VA3AVR

Four Channel Dimmer Rack -  Note: This document describes my light dimmer project I have made.  This document is not ment to be a full construction project and it might lack some details.  The document is designed as an example those who might think to design and build their own dimmer circuit.  If you are plannign to take such project then I must warn you that you must know quite a bit of safetu issues before even thinking of building this kind of device which is connected directly to mains and controls lots of power (mistakes might mean electrical safety and fire safety dangers).   __ Designed by Tomi Engdahl

Halogen light dimmer provides infinite control -  03/16/00 EDN-Design Ideas - Modern lighting systems use halogen lamps, most of which run on 12V ac from a transformer.  The dimmer circuit in Figure 1 can change the intensity of the light from zero to maximum.  The dimmer operates at approximately 12V, unlike the usual ones that function by adjusting the firing angle of the 110 or 220V mains supply __ Circuit Design  by Suded Emmanuel

High Efficiency Halogen Bike Light Dimmer -  This circuit uses a PIC16F84 microcontroller with some software to control20-Watt12V DC halogen lamp__ 

High Power Desktop LCD Backlight Controller Supports Wide Dimming Ratios While Maximizing Lamp Lifetime -  DN264 Design Notes__ Linear Technology/Analog Devices


Light Dimmer Circuits:  #'s - K     L - Z


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