Archive for category: Lighting Circuits Diagram

Pulse Widht Regulator Dimming for LED RGB Video Displays Circuit

Lighting Circuits Diagram | By: Diagram mania

The following simple application can be used to align LED brightness while keeping superior color quality. This application uses pulse width modulation (PWM) dimming formula. This application can be used for single-line scrolling displays, transportation road signs, simple scoreboards, ever-expanding advertising markets covering convenience gas stations, shops, stadiums, and stores. Following pictures shows color shift […]

Sound-Controlled Relay Circuit Diagram

Lighting Circuits Diagram | By: Diagram mania

The following relay circuit will detect the presence of sound to activate the relay. This sound-controlled relay can be used as voice operated switch, light control, toys, or any application controlled by a switch. Replace the switch with this circuit, then you have a sound-controlled device. 741 op-amp is used to amplify the signal. The […]

Audio-Controlled Lamp Light Controller Circuit

Lighting Circuits Diagram | By: Diagram mania

The following schematic is an audio-controlled incandescent lamp light controller. It requires low voltage input such as pre-amplifiers, tone control, or general audio line level output. It’s also conceivable to feed the input with signal from small power amplifier output, or high power amplifier witk low volume level. The feature of lamp dimming (incandescent lamp) […]

How to build Pulsing Third Brake Light

Lighting Circuits Diagram | By: Diagram mania

Circuit dijagram Parts IC1,IC2 = 555 Timer, RS #276-1723 SCR1 = NTE/ECG5402, RS #276-1067, EC103A, MCR104, etc. Q1 = NTE/ECG197, SK3083, TIP125, or equivalent D1,D2,D3 = 1N4148, 1N914, NTE/ECG519, RS #276-1122 D4,D5 = 1N5400, NTE/ECG5850, RS #276-1141, or equivalent R1 = 18K R2 = 330 ohm (RS #271-1315) R3 = 270K R4 = 82K R5,R6 […]

How to build Led display digital Voltmeter

Lighting Circuits Diagram | By: Diagram mania

front side Copyright of this circuit belongs to smart kit electronics. In this page we will use this circuit to discuss for improvements and we will introduce some changes based on original schematic. General Description This is an easy to build, but nevertheless very accurate and useful digital voltmeter. It has been designed as a […]

How to build 6 Channel Auto Reverse Sequential Disco Running Lights

Lighting Circuits Diagram | By: Diagram mania

From 230 V AC a DC supply of + 5 V is obtained. The power supply is given to the other blocks. The pulse generator at a particular frequency generates the clock pulses. The clock pulses are counted by a counter and gives output after every 10 pulses. The counter drives the transistors, which form […]

How to build Triple Stroboscope

Lighting Circuits Diagram | By: Diagram mania

Circuit diagram 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. NE555 works in multivibrator mode generating astable pulses of 2Hz to 20Hz. The frequency is […]

How to build LEDs or Lamps Sequencer

Lighting Circuits Diagram | By: Diagram mania

Very simple, versatile modular design No limits to the number of modules used in the ring Circuit diagram using LEDs: Circuit diagram using Lamps: Parts: R1 1K5 1/4W Resistor R2 680R 1/4W Resistor (Optional, see text) C1 47µF 25V Electrolytic Capacitor D1 LED any type Q1 BC337 45V 800mA NPN Transistor P1 SPST Pushbutton LP1 […]

How to build Temperature-controlled Fan

Lighting Circuits Diagram | By: Diagram mania

Gradually increases speed as temperature increases Widely adjustable temperature range Circuit diagram Parts: P1 22K Linear Potentiometer (See Notes) R1 15K @ 20°C n.t.c. Thermistor (See Notes) R2 100K 1/4W Resistor R3,R6 10K 1/4W Resistors R4,R5 22K 1/4W Resistors R7 100R 1/4W Resistor R8 470R 1/4W Resistor R9 33K 4W Resistor C1 10nF 63V Polyester […]

How to build Dark-activated LED or Lamp Flasher

Lighting Circuits Diagram | By: Diagram mania

Simple photo-sensitive circuit 3V battery supply Circuit diagram Parts: R1 Photo resistor (any type) R2 100K 1/2W Trimmer Cermet R3,R4 10K 1/4W Resistors R5 470R 1/4W Resistor R6 47R 1/4W Resistor C1 220µF 25V Electrolytic Capacitor D1 1N4148 75V 150mA Diode D2 LED Any type and color (See Notes) Q1,Q2 BC337 45V 800mA NPN Transistors […]