Lamp/Lamp Control Electronic Circuits

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

Last Updated: June 02, 2021 01:45 PM

Circuits Designed by Dave Johnson, P.E. :

1 Watt Fluorescent Lamp Night LightIf 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. . . Circuit by Dave Johnson P.E.-March, 1999

1.5v LED Flasher Version AMany published circuits that flash LEDs need 3 volts or more. This circuit uses only a single inexpensive C-MOS IC and flashes the LED for a full year on a single 1.5 volt AA alkaline battery cell. The circuit uses a charge pump technique to provide. . . Circuit by Dave Johnson P.E.-June, 2000

1.5V Touch Activated SwitchA single 1.5v silver oxide button cell powers this complete touch activated switch circuit for 5 years. It features both a normally open and a normally closed set of solid-state switch thermals. It also has an adjustable sensitivity, which can be set for a touch capacitance change as small as 1 picofarad.. . . Circuit by David A. Johnson P.E.-January, 2002

10 LED Sequential Flasher using Low PowrA while back I posted a flasher circuit which flashed 10 LEDs sequentially. That circuit was powered by four AA alkaline cells. The circuit below operates much the same way but has been modified to run from a single 3v CR2032 lithium coin cell. . . Circuit by David Johnson P.E.-April, 2011

12 Volt Lite/Dark Lamp SwitchOften, for certain low voltage lighting systems; you would like to turn off the lights during the bright light of the day. Most commercial day/night switches are designed for AC lighting. The circuit below was designed for a 12v DC system. But, it could be modified for other voltage as well. It uses an inexpensive phototransistor as the light detector. . . . Hobby Circuit designed by David Johnson P.E.-June, 2008

12v Light/Dark Lamp SwitchAt night, this circuit will route current to a 12v lamp, turning it on. . . Circuit by David Johnson P.E.-July, 2006

12v Touch Switch Exciter CircuitThis circuit is designed to generate a 20KHz pseudo sine wave signal that can power about 50 remote touch activated switch circuits. It can support a cable length of about 2500 feet. A typical remote switch circuit is also shown as well as a receiver circuit for those switches.. . . Circuit by David Johnson P.E.-February, 2002

14v LED AuxiliaryLamp with a 60 Watt LampThis 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 . . . Hobby Circuit designed by David Johnson P.E.-July, 2006

1W White LED Night LightAs many of you know, I have a pet peeve with poorly made LED night lights. Often, the light from the LED quickly fades, so within months, the light is useless. I have posted several versions of modified night lights using higher quality components. This circuit is yet another version, which produces much more light than those other designs. . . . Hobby Circuit designed by Dave Johnson P.E.-November, 2008

3 Minute LED Closet LightThe circuit below is powered by three 1.5v alkaline AA cells. With a finger tap to the pushbutton trigger switch, a cluster of 6 wide angle white LEDs is turned on. The lights remain on for about 3 minutes, then will turn off. The circuit’s standby current . . . Hobby Circuit designed by Dave Johnson P.E.-November, 2010

3 Volt Low Battery Voltage FlasherThis circuit is designed to monitor two alkaline cells (3v) that form the battery often used in portable electronic equipment. . . Circuit by David Johnson P.E.-January, 1998

3-Minute Closet LightI have a coat closet by my front door. The thing is very dark at night and really needs some kind of illumination inside. I could hire an electrician to install a light in the closet ceiling and then wire it to a toggle switch outside the door but that would cost me quite a bit of money. . . Circuit by Dave Johnson P.E.-December, 2011

3-Minute Closet Light #2The circuit below is powered by three 1.5v alkaline AA cells. With a finger tap to the pushbutton trigger switch, a cluster of 6 wide angle white LEDs is turned on. The lights remain on for about 3 minutes, then will turn off. The circuit’s standby current is only a few microamps. A set of fresh batteries should last at least 200 light applications. The circuit uses a Schmitt trigger inverter and two transistors. When the pushbutton switch S1 is pressed, the 10uF capacitor C1 is discharged. . . Circuit by Dave Johnson P.E.-November, 2010

3v Powered Super Bright LED FlasherI have posted several kinds of LED flashers over the years. This is yet one more flasher, designed to flash any high power LED of any color. It hits the LED with a 25ms 250ma pulse once every 2 seconds. This works out to an average current about 3ma. It . . . Hobby Circuit designed by David Johnson P.E.-April, 2009

3v Universal LED FlasherThis low power LED flasher circuit draws about 100ua from any DC power supply ranging from 3 volts to 24 volts. The 1.0Hz 10ms LED pulsed current is held to a constant 10ma . . . Hobby Circuit designed by David Johnson P.E.-July, 2006

5w Fluorescent Lamp Intensity ModulatorThe 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. . . Circuit by Dave Johnson P.E.-June, 2000

60 Watt Lamp with Auxiliary 14v LED LampThis 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. . . Circuit by Dave Johnson P.E.-July, 2006

6V to 24V DC Day/Night SwitchUsing an inexpensive phototransistor, this circuit switches 12v to 24v power to a load, whenever the sun goes down. . . Circuit by Dave Johnson P.E.-July, 2006

9v Powered Xenon Photoflash ControllerThis 9v battery powered circuit is designed for remote control flash needs. A charge control circuit turns off the high voltage generator when the photoflash capacitor is fully charged. A neon lamp is included to indicate when the system is ready to flash. . . Circuit by Dave Johnson P.E.-June, 2000

Advertising Badge #1 with Flashing LEDI have seen numerous flashing light badges at trade shows and conventions. They are often handed out as gifts to promote some business. The devices often use inefficient circuits, which cause the battery power source to be quickly depleted. . . Circuit by David Johnson P.E.-March, 2002

Advertising Badge #2 with Flashing LEDThis circuit uses a CD4013 dual D Flip/Flop IC. A single lithium battery will provide months of continuous LED flashing. It also has a tiny push-button switch to turn on and off the light flashing. . . Circuit by David A. Johnson P.E.-March, 2002

Amplifier for a Xenon Lamp Flash Detector - This circuit has a very low standby current requirement yet has very high sensitivity toward the light flashes from a xenon lamp. When connected to a flip/flop it can serve as an on on/off Controller. . . Circuit by David A. Johnson P.E.-February, 2002

Battery Free LED FlasherLED flashers have been used for a wide variety of applications. Some flasher units have been used in food and hardware stores, to draw attention to sale items and are often attached to boxes which dispense product discount coupons. . . Circuit by Dave Johnson P.E.-December, 2010

Battery-Powered LED Flashing Advertising #2This circuit is similar to flashing LED advertising badge #1. It uses a CD4013 dual D Flip/Flop IC. The 74HCT74 IC in #81 does not always work. As in #81, a single lithium battery will provide months of continuous LED flashing. . . . Hobby Circuit designed by Dave Johnson P.E.-March, 2002

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

Back & Forth Flasher - for16 LEDs. __ Designed by Tony van Roon VA3AVR

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%.

Bar-mode LED-cluster sequencer - Bar-mode LED-cluster sequencer. Can drive up to 16 clusters. __ Contact: Flavio Dellepiane, fladello @ tin.it

Bar-mode Lights Sequencer - Can drive up to 15 LEDs or LED-clusters; Selectable Bar-length __ Contact: Flavio Dellepiane, fladello @ tin.it

Basic FlashLamp Illuminationry for Cellular Telephones/Cameras - DN345 Design Notes__ Linear Technology/Analog Devices

Basic LED flasher using NE555 timer IC - This circuit has a lot going for it. For one thing, it only consists of two transistors, two capacitors and four resistors. That also means it consumes very little power. You can control the flash rate by changing the size of the 100k resistors (100k makes for a pretty slow rate) . You can also control the duty cycle by using resistors of different values on the two sides __ Designed by Colin Pringle

Basic LM3909 LED Flasher - LED flasher with the LM3909 IC and runs from1.5-Volt battery. __ Designed by Tony van Roon VA3AVR

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 Design by David Magliocco, CDPI, Scientrier, France

Bass Beat Extractor - an automatic gain control circuit followed by a low pass filter, converts beat into a sharp pulse suitable for triggering strobe or chaser __ Designed by Rod Elliott ESP

Battery Free LED Flasher - LED flashers have been used for a wide variety of applications. Some flasher units have been used in food and hardware stores, to draw attention to sale items and are often attached to boxes which dispense product discount coupons. . . Circuit by Dave Johnson P.E.-December, 2010

Battery Powered Night Lamp - Ultra-Low current drawing1.5 Volt battery supply __ Contact: Flavio Dellepiane, fladello @ tin.it

Battery-Powered LED Flashing Advertising #2 - This circuit is similar to flashing LED advertising badge #1. It uses a CD4013 dual D Flip/Flop IC. The 74HCT74 IC in #81 does not always work. As in #81, a single lithium battery will provide months of continuous LED flashing. . . . Hobby Circuit designed by Dave Johnson P.E.-March, 2002

Battery-powered Night Lamp - This circuit is usable as a Night Lamp when a wall mains socket is not available to plug-in an ever running small neon lamp device. In order to ensure minimum battery consumption, one 1.5V cell is used, and a simple voltage doubler drives a pulsating ultra-bright LED: current drawing is less than 500µA. __ Contact: Flavio Dellepiane, fladello @ tin.it

Beat Tracking Strobe - Strobe lights have always been an integral part of dance parties, adding an additional element of excitement to the festivities on hand. The combination of flashing lights and music-especially those with a definitive strong beat- are a natural complement to one another, where the strobing of light is an extension and links one's aural perception to his visual senses. The applications of strobe lights are numerous. In more involved and comprehensive applications the strobe user would like the strobe to help fuse together the music and light. For our final project we opted to attempt to create such a strobe system appropriate for the more complex application by creating a light strobe system that flashes a light source directly in sync with the music in real time __ Designed by Chris Chan and Kenneth Liu

Bedside Lamp Timer - 30 minutes operation; Blinking LED signals 6 last minutes before turn-off __ Contact: Flavio Dellepiane, fladello @ tin.it

Bell-Cum-Light Controller - This bell-cum-light controller circuit is equipped with four switches labelled S1 through S4. While S4 is the mains ‘on’/‘off’ toggle switch for powering the timer circuit for lighting up a bulb...__ Electronics Projects for You

Bells ring Generator - Three circuit options; Can be synchronized to Christmas tree flashing lights __ Contact: Flavio Dellepiane, fladello @ tin.it

Bicycle back Safety Light - Flashing 13 LED unit, 3V supply; Also suitable for jogger/walkers __ Contact: Flavio Dellepiane, fladello @ tin.it

Bicycle rear flashing LED light - No circuit description, schematic only__ CdS Electronic

Bicycle Rear-Light AftergLow - This article is of interest only to readers whose bicycle lights are powered by a dynamo. The laws on bicycle lights in the United Kingdom are stricter than in most other countries and a dynamo is, therefore, a rarity in the UK. For safety’s sake, it is obligatory for cyclists in the UK to have the rear light of their bicycles __ Designed by Popescu Marian

Bidirectional Photoelectric SystE - M - Detects and counts inputs and outputs. Suited to control Lamps, Household Appliances etc. __ Contact: Flavio Dellepiane, fladello @ tin.it

Bike Turning Signal - This circuit can be used to indicate left and right turn on a motor-bike. Two identical circuits will be needed, one for left and one for right. __ 555-Timer

Birthday Heart - This circuit was made for my wife's birthday. It is capable of flashing five strings of LED's with different frequencies. It also has a connector for an 8 Ohm loudspeaker and two connectors for the small PCB's that are contained in musical greeting cards. In this way the circuit will play alternatingly two room filling tunes at regular time intervals. After a w __ Designed by Michel Van den Bergh On Electronics

Black Light (UV Tube Lamp) Inverter - The voltage boosting in this circuit enable its operation to be powered by 2.5 V rechargeable battery (two cells 1.2V rechargeable batteries) , supplying 400 mA current at 26 V which is needed by the gas arc tube for portable ultraviolet lamp. This inverter circuit has a good efficiency as well, about 80%. Ultraviolet (UV) light is also known as black light since the light is invisible, __ Designed by Motorola Application Notes

Black Light powered by a 6 volt battery - This circuit is a simple ultraviolate light that can be powered by a 6 volt battery or power supply that is capable of supplying 1 or more amps. Circuit diagram Parts C1 0.0047uf Mono Capacitor C2 0.1uf Disc Capacitor D1, D2 1N4007 Diode FTB __ Designed by Aaron Cake

Blink a LED - For non-embedded programmers the first thing to try on a new system or in a new programming language is to print out "hello world". The equivalent for microcontrollers and other embedded systems is to blink a LED. When even the target circuit and the programmer are freshly put together it is wise to start even lower, with a blink-a-LED program written by someone else that is known to be working. Then when the LED does not blink (which is likely) there is one thing less to doubt about. On this page you will find 1 and 2 Hz blink-a-LED (and some other) test programs for various targets chips and circuits. __ Designed by © © 2002 Van Ooijen Technische Informatica / Wouter van Ooijen

Brake Light Flasher for Motorcycles - Several years ago one car manufacturer added a rapid flasher to their brake lights. Wow! Those things really got your attention when the driver stepped on the brakes. But, if you ever had to stop behind one at a traffic light at night, you were likely to go into seizures from the strobing, rear lights covering your field of vision. I think they dumped the idea __ Designed by Tony van Roon VA3AVR

Brake Light Signal Module - Generates 4 short flashes, followed by a steady on light; Can drive LED Arrays at currents up to 1 Amp __ Contact: Flavio Dellepiane, fladello @ tin.it

Brakelight Flasher - This is basically a flasher circuit modified to turn on and off a bulb instead of a LED. It uses a 555 timer IC working as an astable multivibrator. The flashing rate can be varied from very fast to a maximum of once in 1.5 sec by varying preset VR1. The ON time of circuit is given by: TON= 0.69xC1x (R1 + VR1) second and OFF time is: TOFF= 0.69xC1xVR1 second __ Designed by Radioland.nt.au

Brakelight hookup - This circuit is NOT a pulser or flasher! What's so special about this circuit? Well, the first third-brake light I installed I had to pull a wire from the Third Brake Light all the way underneath the carpet to the brake-pedal-switch and I thought it would be easier to pluck the signal of both brakelights via the trunk. Bench-test your circuit first and apply power to the circuit, __ Designed by Tony van Roon VA3AVR

Bright 10W LED Floodlight - Light level rivals halogensat MUCH less power!__ SiliconChip

Bright 20W LED Floodlight - Last February, we published a DIY 10W LED Floodlight, which has been enormously popular. We said that one was almost blindingbut to paraphrase Croc Dundee, that's not bright. THIS one is BRIGHT!__ SiliconChip

Build the Lightning Bulb - The Lightning Bulb circuit uses a quadrac (see Fig.1) --a device that combines a TRIAC and a diac trigger in a single package--to control the supplied current. Figure 1A shows the schematic symbol for the quadrac, while figure 1B shows the pinout for the unit used in our circuit. Note that quadracs are increasingly difficult to come by;. __ Designed by Vincent Vollono

Build Your Own Popcorn Strobe - Mini 555 Monostable circuit creates big fun. __ Contact: Jameco Electronics

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