Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


Lamp / Light Control Circuits
Lamp Controls:   #'s - B       C - K       L - M       N - S       T-Z


Last Updated: December 29, 2017 03:15 AM

Circuits Designed by Dave Johnson, P.E. :

High Intensity Line Powered LED FlasherThere are times when you would like to generate an intensely bright flash of light using electrical power from the AC line.  The circuit below can drive a one to three watt power LED with about 350ma of peak current.  Since the circuit drives the LED with. . . Circuit by David Johnson P.E.-December, 2008

High Power Flashing LED  -  The circuit converts an off-the-shelf solar powered LED path light from producing a steady state light to one that produces a flash. This circuit includes a tiny dual Schmitt trigger inverter IC which form the pulse generator and the daylight sensor circuit . . . Dave Johnson, Lubbock TX-DC Magazine - Issue 7 Mar 2010

High Power LED Flasher  -  Power LEDs are becoming more popular these days.  The DC input power to these devices ranges from 1 watt to 5 watts.  Normal LEDs only receive about 0.  05 watts.  At this higher power, these devices can emit a lot of light . . . Dave Johnson, Lubbock TX (Aug 10, 2008)-DC Magazine - Issue 7 Mar 2010

High-Power_Flashing_LED  -  The circuit converts an off-the-shelf solar powered LED path light from producing a steady state light to one that produces a flash. This circuit includes a tiny dual Schmitt trigger inverter IC which form the pulse generator and the daylight sensor circuit . . . Dave Johnson, Lubbock TX-DC Magazine - Issue 7 Mar 2010

HO Model Train Lighthouse Flasher -HO train sets often have authentic looking scale model homes and buildings.  The hobby circuit below can be mounted inside a model lighthouse.  The electronic circuit drives a single LED lamp in such a way that it produces light which simulates the rotation . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2006

HO Train Lighthouse Flasher Revisited - HO train sets often have authentic looking scale model homes and buildings.    A while back someone asked me to design a flashing LED light, which he could mount inside a model lighthouse and have it operate so it would appear to rotate and flash.    I designed a working circuit but I was never pleased with the results.    I’m still not 100% pleased but the revised circuit below seems to operate a bit better than the older circuit.   . . . Hobby Circuit designed by Dave Johnson P.  E.  , May 2012] . . . Hobby Circuit designed by David Johnson P.E.-December, 2012


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

Four Channel CAR Color Organ -  Back in the 1970's these were popular for use in homes and the colored bulbs were typically place in a box with a sheet of "rippled/bubbled" Plastic in front to break up the light patterns.  Some units gave very impressive light patterns.   __ Designed by G.L. Chemelec

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

Four Channel HOME Color Organ -  FOUR Channels.  All Channels are Active Band Pass Filters.   __ Designed by G.L. Chemelec

Four DIPs provide as many as 80 sequential-LED outputs -  08/21/08 EDN-Design Ideas A simple circuit uses HCMOS parts and adds one 74HC540 to multiplex the outputs of two 4017 counters for as many as 80 outputs __ Circuit Design by Greg Carkner, Cobourg, ON, Canada

Freeze Alarm -  I chose an accurate thermistor from Keystone as the temperature sensor for this circuit.  This device has a very specific resistance at a particular temperature.  According to the data sheet for the thermistor, the device will have a resistance of 361K at zero degrees C, which is the freezing point of water.  The thermistor is wired into a simple bridge circuit, which uses 1% resistors.  The bridge is connected to a very low power voltage comparator.  The circuit forms a switch circuit, which changes state, when the resistance of the thermistor reaches a certain value.  At zero degrees C the voltage at the non-inverting input of the comparator exceedsCircuit Solution by David Johnson P.E.-May, 2006

Fuse-Panel Emergency Light -  The area around the Main Electrical Panel is usual pretty dark, especially if it is located in the basement.  That's during daylight hours.  At night everything is dark during a powerfailure, or tripped circuit breaker, fuse, etc.  This circuit provides ample time to fix the problem __ Designed by Tony van Roon  VA3AVR

Galloping Neons -  Here is a line powered array of blinking neons designed for continuous duty.  It would be quite dangerous to power a circuit directly from the power line so some form of isolation is needed.  Since most experimenters will not have 120 volt isolation transformers __ Contact: Charles Wenzel of Wenzel Associates, Inc.

Game Show Who's First Indicator Lights -  The circuit above turns on a light corresponding to the first of several buttons pressed in a "Who's First" game.  Three stages are shown but the circuit can be extended to include any number of buttons and lamps.  Three SCRs  (silicon controlled rectifiers) are connected with a common cathode resistor  (50 ohm) so that when any SCR conducts, the voltage on the cathodes will rise about 7 volts above the voltage at the junction of the 51K and 1K ohm resistors and prevent triggering of a second SCR.  When all lamps are off, and a button is pressed, the corresponding SCR is triggered due __ Designed by Bill Bowden

Garage Light & Security Control -  Useful for vehicle owners, this gadget automatically turns on indoor/outdoor garage lights and raises an alert when an automobile enters the garage.  Assume switch S2 is in ‘on’  (closed) state.  When power...__ Electronics Projects for You

Generator Room Light -  At night when power fails, one finds it difficult to reach the generator to start it.  Here is the circuit for a generator room light that automatically turns on at night,...__ Electronics Projects for You

Grand Cherokee Off Highway Lights -  I purchased my 95 ZJ as a daily driver and as a tow rig for my CJ-7.  I have to drive roughly 240 km  (110 miles??) a day.  A lot of this driving is done in the dark, and since I live in the woods, there is naturally a lot of wildlife to be seen, and hit.  I also didn't want to hit another deer  (hit one almost one month after I bought it) .  I felt that the high beams on my ZJ were inadequate, so I decided to add some high powered lights.  I purchased four Pro Comp 8 inch 130 watt lights.  I mounted them on a roof rack that I built, which also holds my spare tire and 55-watt reverse light  (which I get to later) .   __ Designed by Mike Mueller

GrantronICs Projects Christmas Tree -  flashes LEDs mounted to Christmas tree shape PCB, kit from kitsrus.  com __ Designed by © Grantronics Pty Ltd

Green/Red Multiflasher -  NOTE : Must register on this site __ Designed by Published in Elecktor July/Aug, 2010

Hacking the Kodak Max Single Use Flash Camera into a Self-Repeating Strobe -  NOTE this approach is recommended mainly for Homebrewing a strobe that is powered by a single 1.5 volt battery.  If you can use a higher supply voltage, there are better ways to do this.   __ Designed by Don Klipstein

Half Bridge Inverter has Variable Frequency -  10/09/97 EDN-Design Ideas Modern electronic ballasts require added features, such as high-frequency preheat for filaments, nominal lamp-power control, and light-dimming capability.  Because the output inverter operates in resonant mode, you can control the power or current of these ballasts simply by varying the switching frequency.  To vary the frequency, __ Circuit Design by Thierry Castagnet, SGS-Thomson Microelectronics, Schaumburg, I - L

Halloween Flashing-Eyes Badge -  Two LED-eyes follow the rhythm of music or speech; 3V Battery-operated device suitable for pins or badges __ Contact: Flavio Dellepiane, fladello @ tin.it

Halloween Pumpkin with Colorful LED Candles -  Extensive tutorial on putting blinking LEDs and different colored LEDs into jack-o-lanterns.  Includes schematics, solderless breadboard photos, and three movies  (the blue pulsing LED is my favorite) .  Great way of getting started in electronics! Although this was written for Halloween, the techniques are applicable for Christmas votive candles as well.   __ Contact: David Cook

Halogen Lamp Saver for Bikes -  Halogen lamps are prone to burn-out owing to their low cold current.  The rapid heating inside the lamp melts the thin filament and cuts the lamp life short.  The circuit described...__ Electronics Projects for You

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

HB-LED flashing beacon repurposes switching regulator -  EDN-Design Ideas 08/04/2014     A classic, low-cost “switcher” IC is repurposed to flash a high-brightness LED in this minimal-parts-count Design Ideas -  __ Circuit Design by T A Babu

H-Bridge -  This circuit drives small DC motors up to about 100 watts or 5 amps or 40 volts, whichever comes first.  Using bigger parts could make it more powerful.  Using a real H-bridge IC makes sense for this size of motor, but hobbyists love to do it themselves, and I thought it was about time to show a tested H-bridge motor driver that didn't use exotic parts __ Designed by Bob Blick

H-bridge paves New ways for LED lighting -  07/11/13  EDN-Design Ideas Drive a LED array directly from the AC mains in full-wave current-limited mode to realize a flicker-free, energy-efficient solid-state lamp.  The H-bridge is a classic circuit used for driving DC motors in a user-defined manner, such as in forward/reverse direction or PWM-assisted controlled RPM with the help of four discrete/integrated switches or electromechanical relays.  It is widely employed in robotics and power electronics.  This Design Idea is a novel implementation of this technique for driving white-LED arrays directly from the AC mains in full-wave current-limited mode to realize an excellent flicker-free, energy-efficient solid-state lamp.   __ Circuit Design by Subodh Johri

Headlight Minder -  Turns OFF your Headlights, if you forget.  And with a Time Delay, if wanted.   __ Designed by G.L. Chemelec

Heart of LEDs -  Here is a fun project that you can give to that "someone special".  How about Mother's Day or did you forget St Valentine's Day?.   __ Designed by © Grantronics Pty Ltd

Heart-shaped Badge -  The badge consists of eight LEDs arranged in the shape of a heart.  One LED is lit at a time and this 'chases' round the shape.  It would be easy to adapt this project to create other shapes with the eight LEDs.   __ Designed by John Hewes

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

High Intensity Line Powered LED Flasher -  There are times when you would like to generate an intensely bright flash of light using electrical power from the AC line.  The circuit below can drive a one to three watt power LED with about 350ma of peak current.  Since the circuit drives the LED with. . . Circuit by David Johnson P.E.-December, 2008

High Power Flashing LED  -  The circuit converts an off-the-shelf solar powered LED path light from producing a steady state light to one that produces a flash. This circuit includes a tiny dual Schmitt trigger inverter IC which form the pulse generator and the daylight sensor circuit . . . Dave Johnson, Lubbock TX-DC Magazine - Issue 7 Mar 2010

High Power LED Flasher  -  Power LEDs are becoming more popular these days.  The DC input power to these devices ranges from 1 watt to 5 watts.  Normal LEDs only receive about 0.  05 watts.  At this higher power, these devices can emit a lot of light . . . Dave Johnson, Lubbock TX (Aug 10, 2008)-DC Magazine - Issue 7 Mar 2010

High Power LED Mood Lamp  -  in this page we will introduce a great project designed by Toon Beerten.  His project named "DIY LED Mood Lamp" can become a very interesting add-on for your room that's absolutely sure it will impress everyone.  As you can see on the photos, we talk about a color fading lamp, that looks amazing!  __ Designed by Toon Beerten

High-Power_Flashing_LED  -  The circuit converts an off-the-shelf solar powered LED path light from producing a steady state light to one that produces a flash. This circuit includes a tiny dual Schmitt trigger inverter IC which form the pulse generator and the daylight sensor circuit . . . Dave Johnson, Lubbock TX-DC Magazine - Issue 7 Mar 2010

Highway Alert Signal Lamp -  Here is a signal lamp for safe highway driving.  The lamp automatically emits brilliant tricolour light when a vehicle approaches the rear side of your vehicle.  It emits light for 30...__ Electronics Projects for You

HO Model Train Lighthouse Flasher -  HO train sets often have authentic looking scale model homes and buildings.  The hobby circuit below can be mounted inside a model lighthouse.  The electronic circuit drives a single LED lamp in such a way that it produces light which simulates the rotation . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2006

HO Train Lighthouse Flasher Revisited -  HO train sets often have authentic looking scale model homes and buildings.    A while back someone asked me to design a flashing LED light, which he could mount inside a model lighthouse and have it operate so it would appear to rotate and flash.    I designed a working circuit but I was never pleased with the results.    I’m still not 100% pleased but the revised circuit below seems to operate a bit better than the older circuit.  … [ . . . Hobby Circuit designed by Dave Johnson P.  E.  , May 2012] . . . Hobby Circuit designed by David Johnson P.E.-December, 2012

How to Make a Business Card Flashlight -  The aim of this article is to make a business/visiting card useful, something that people really do not want to throw away and use as a piece of advertising.  Essence of...__ Electronics Projects for You

How to Make Chase Lights -  This example shows3 track chase lights built from3-Christmas light sets and1-light chaser controller

   <<<         >>>

Lamp Controls:   #'s - B       C - K       L - M       N - S       T-Z


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - December, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.