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Light and LED circuit diagrams

Very popular circuits! Running lights, stroboscope, light shows

LED Photo Sensor


Here's a circuit that takes advantage of the photo-voltaic voltage of an ordinary LED. The LED voltage is buffered by a junction FET transistor and then applied to the inverting input of an op-amp with a gain of about 20. This produces a change of about 5 volts at the output from darkness to bright light.
[View LED Photo Sensor circuit diagram]


Fantastic Atom Expander


The LEDs can be any colour but blue. For a very interesting effect, make one ring red, the next one green, the next one orange, then yellow, etc.
[View Fantastic Atom Expander circuit diagram]


Colour-Sound-Organ


Anyone who has been to a night club, concert or school dance has probobly seen a colour organ. Colour organs cause lights to blink and flash to music from your TV, stereo, guitar and even your own voice.
[View Colour-Sound-Organ circuit diagram]


40W Fluorescent Lamp Inverter


This 40W fluorescent lamp inverter allows you to run 40W fluorescent tubes from any 12V source capable of delivering 3A.
[View 40W Fluorescent Lamp Inverter circuit diagram]


230V Blinking LED


I needed a pulsating light for a certain signaling. Voltage was 230V. So I decided to make a simple circuit, consisted of a LED diode, two capacitors, two resistors, a diac and a diode.
[View 230V Blinking LED circuit diagram]


28 LED Clock Timer


This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes.
[View 28 LED Clock Timer circuit diagram]


Nite Rider Lights


As a keen cyclist I am always looking for ways to be seen at night. I wanted something that was a novelty and would catch the motorists eye.
[View Nite Rider Lights circuit diagram]


Low cost-Automatic Emergency Light


1. It is highly bright due to the use of white LEDs. 2. The light turns on automatically when mains supply fails, and turns off when mains power resumes. 3. It has its own battery charger. When the battery is fully charged, charging stops automatically.
[View Low cost-Automatic Emergency Light circuit diagram]


5 Lamp-LED Flash Driver


It is a low cost, low-power C-MOS LSI designed for lamp andLED flash driver.
[View 5 Lamp-LED Flash Driver circuit diagram]


200W Lamp Flasher


200W Lamp Flasher kit is used to flash lamps, bulbs and halogen lamp to give your product that attracting look.
[View 200W Lamp Flasher circuit diagram]


Triple Stroboscope


This circuit enables observation of movement between other stroboscopes. Generation of rectangular signal is based on NE555. This circuit requires a low power supply that is made from a simple transformer TR1, traditional rectifier bridge and zener diode.
[View Triple Stroboscope circuit diagram]


LASER Transmitter-Receiver


This set of two circuits from the basis for a very simple light wave transmitter. A LASER beam is modulated and then aimed at a receiver that demodulates the signal and then presents the information (voice, data, etc..).
[View LASER Transmitter-Receiver circuit diagram]


TRIAC Light Dimmer


This little circuit can be used to dim lights up to about 350 watts. It uses a simple, standard TRIAC circuit that, in my expirience, generates very little heat. Please note that this circuit cannot be used with fluorescent lights.
[View TRIAC Light Dimmer circuit diagram]


LED Chaser


I don't know why, but people like blinking lights. You see LED chasers everywhere, in TV shows (Knight Rider), movies, and store windows. This schematic is my version of a simple 10 LED chaser.
[View LED Chaser circuit diagram]


LEDs or Lamps Sequencer


Very simple, versatile modular design. No limits to the number of modules used in the ring
[View LEDs or Lamps Sequencer circuit diagram]


Brightness Control for small Lamps


This device was designed on request, to control the light intensity of four filament lamps
[View Brightness Control for small Lamps circuit diagram]


Fading LEDs


This circuit operates two LED strips in pulsing mode, i.e. one LED strip goes from off state, lights up gradually, then dims gradually, etc. while the other LED strip do the contrary. Each strip can be made up from 2 to 5 LEDs at 9V supply.
[View Fading LEDs circuit diagram]


Dancing LEDs


Dancing LEDs
[View Dancing LEDs circuit diagram]


LED or Lamp Pulser


This circuit operates a LED in pulsing mode, i.e. the LED goes from off state, lights up gradually, then dims gradually, etc.
[View LED or Lamp Pulser circuit diagram]


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.
[View Battery-powered Night Lamp circuit diagram]


Courtesy Light


This circuit is intended to let the user turn off a lamp by means of a switch placed far from bed, allowing him enough time to lie down before the lamp really switches off.
[View Courtesy Light circuit diagram]


Two-wire Lamp Flasher


This circuit has been designed to provide that continuous light lamps already wired into a circuit, become flashing. Simply insert the circuit between existing lamp and negative supply.
[View Two-wire Lamp Flasher circuit diagram]


220 Volts Flashing Lamps


Make 220v device that flashes lamps in adjustable flashing rate. Be careful! This voltage can kill!
[View 220 Volts Flashing Lamps circuit diagram]


LED or Lamp Flasher


Build LED or lamp flasher for decoration or as indicator in other devices.
[View LED or Lamp Flasher circuit diagram]


Adjustable Strobe Light


Make yourself strobe light for parties. Flashing speed for this device can be adjusted easily.
[View Adjustable Strobe Light circuit diagram]


Black Light


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.
[View Black Light circuit diagram]


Instrument panel lamp dimmer control


This circuit uses an MC3392 low side protected switch and an MC1455 timing circuit to form an automotive instrumentation panel lamp dimmer control. The brightness of incandescent lamps can be varied by Pulse Width Modulating the input of the MC3392.
[View Instrument panel lamp dimmer control circuit diagram]


Neon Desklamp


Make a neon bulb run on a 12V DC. It has a low power consumption and it's very easy to build.
[View Neon Desklamp circuit diagram]


Bicycle back Safety Light


This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order.
[View Bicycle back Safety Light circuit diagram]


6 Channel Disco Running Lights


Yet another circuit designed for home parties. It controls 6 (but up to 10) 220/110V bulbs and makes the light "running" between them. Use color bulbs for real show!
[View 6 Channel Disco Running Lights circuit diagram]


12VDC Fluorescent Lamp Driver


12VDC Fluorescent Lamp Driver. Very useful to have in car, or when camping.
[View 12VDC Fluorescent Lamp Driver circuit diagram]


Adjustable Strobe Light


Adjustable Strobe Light. Ideal for home parties.
[View Adjustable Strobe Light circuit diagram]


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