Archive for category: Lighting Circuits Diagram

LED Metronome Circuit

Lighting Circuits Diagram | By: Diagram mania

The LED Metronome is a modern interpretation of a classic device which is a staple of music teachers, students and composers everywhere. This circuit uses 12 LEDs to simulate the sweeping motion of the pendulum and a speaker with a simple amplifier to generate a tick as the LEDs at the end of the arc […]

LED Thermometer

Lighting Circuits Diagram | By: Diagram mania

This LED thermometer is designed for in home use, to read temperatures between about 60 and 78 degrees Fahrenheit. It is based around a precision temperature sensor IC, the LM34DZ. This sensor require no calibration and can measure temperatures of between -50F and +300F. While the circuit shown here does not use the full range […]

Simple Colour Organ

Lighting Circuits Diagram | By: Diagram mania

This is a simple, one lamp colour organ. It is far less complicated then the Three Channel Colour Organ. It is simply a lamp controlled by an SCR. It can be built in a few minutes, and combined with other circuits to make some pretty neat effects. Schematic Parts Part Total Qty. Description Substitutions R1 […]

Light/Dark Detector

Lighting Circuits Diagram | By: Diagram mania

This handy little circuit can tell the difference between darkness and light, making it very useful for switching on and off signs, porch lights or other things when it gets dark or light. Schematic Parts Part Total Qty. Description Substitutions R1 1 100K Pot Q1 1 2N3904 NPN Transistor 2N2222 Q2 1 NPN Phototransistor RELAY […]

7 Segment LED Counter

Lighting Circuits Diagram | By: Diagram mania

This simple counter can be used to count pulses, as the basis for a customer counter (like you see at the doors of some stores), or for anything else that may be counted. The circuit accepts any TTL compatible logic signal, and can be expanded easily (see Notes). Schematic 7 Segment Display Reference Parts Part […]

TRIAC Light Dimmer

Lighting Circuits Diagram | By: Diagram mania

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. Schematic Parts Part Total Qty. Description Substitutions R1 1 50K Pot R2 1 15K 1/2W […]

Strobe Light

Lighting Circuits Diagram | By: Diagram mania

Disco anyone Actually, this strobe serves a much more useful purpose then making it look cool when you dance in the dark. You can use it to view fast moving objects, look for craks in PC boards (hold the strobe on the trace side of the board and look from the component side), and it […]

LED Chaser

Lighting Circuits Diagram | By: Diagram mania

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. There is no 555 timer used because at my local electronics store they are over $4 Cdn. Instead, an oscillator made […]

LASER Transmitter/Receiver

Lighting Circuits Diagram | By: Diagram mania

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..). The whole thing is very easy to build and requires no specialized parts execpt for the LASER […]

IR Remote Switch Circuit

Lighting Circuits Diagram | By: Diagram mania

This circuit lets you control any line powered electrical device (a lamp, television, fan, etc.) using any infra-red remote control. Almost everyone these days has a pile of old IR remotes left over from appliances they have long ago disposed of them. With this circuit, you can put them back into use. The circuit looks […]