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  • Crystal-controlled oscillator

    2014-12-20 18:08:4276

    This circuit oscillates without the crystal. With the crystal in the circuit, the frequency will be that of the crystal The circuit has good starting c...

  • Gu10 led light bulbs driver using LNK605DG

    2014-12-20 18:06:38268

    A very simple high efficiency Gu10 led light bulbs driver power supply circuit that can be used as a LED driver for driver for GU10 lamp can be designe...

  • Beautiful car brake lights by BC327

    2014-12-20 18:03:03280

    This circuit will like to set up in a room takes of an automobile mostly, for the beauty or Beautiful car brake lights circuit. It make a car that foll...

  • AT89C2051 serial COMs to LED driver (AT89C2051)

    2014-12-20 17:29:37114

    This article introduces the AT89C2051 serial COMs to LED driver (AT89C2051). The principle is very simple, very practical. The circuit components can h...

  • Simulate the Gyralite (dual flashing headlights) (LM555N)

    2014-12-20 17:06:16167

    This article describes the Simulate the Gyralite (dual flashing headlights) (LM555N). The content is very simple, very helpful. Diagram showing the pri...

  • Supercap and White LED and Energy Harvesters (DS2003)

    2014-12-20 16:42:5974

    This is a educative and simple example to help learn about supercaps and white LED. It will also help you understand component behavior. If you are lea...

  • How to build Photo Electric Street Light

    2014-12-20 16:03:0676

    Circuit diagram Description This is basically a Schmitt Trigger circuit which receives input from a cadmium sulfide photo cell and controls a relay tha...

  • The Lightest Material Has New Breakthrough!

    2014-12-20 15:29:2072

    Do you know what the lightest material on the Earth is? Well, dont be shamed, if you cannot answer the question! Lets reveal the answer here: Aerogel! ...

  • Automatic Porch-Light Control Circuit

    2014-12-20 15:24:51142

    The automatic porch-light control circuit holds a triac on until a 4020 divider counts a number of 60-Hz powerlinc pulses. The circuit turns off a ligh...

  • Led bar-dot level meter

    2014-12-20 15:14:45282

    A simple level of power meter can be arranged to give a bar or dot display for a hi-fi system. Use green LEDs for 0 to 7; yellow for 8 and red for 9 to...

  • Voltage controlled variable gain amplifier II

    2014-12-20 15:10:24306

    The 2N5457 acts as a voltage variable resistor with an RdS of 800 ohms max Since the differential voltage on the LM101 is in the low mV range, the 2N54...

  • Computer Controlled Frequency Counter/Logic Probe

    2014-12-20 14:54:5477

    This circuit is a stable frequency counter accurate to 5 significant digits. The range is 0 - 30MHz with an input sensitivity of greater then 100mV. Th...

  • Light sensitive switch circuit design electronic project

    2014-12-20 14:48:3977

    Sensors This light sensitive switch circuit is designed using common electronic parts and can be used in applications like scale automatically lighting...

  • 1.2 - 12V / 1A Low Voltage LED Indicator Power Supply with L

    2014-12-20 14:47:1390

    1.2 - 12V / 1A Low Voltage LED Indicator Power Supply with LM317 This is a 1.2 - 12 V, max 1A power supply with a low voltage indicator LED. The indica...

  • train detector using ambient light and a photocell (NE555)

    2014-12-20 13:57:4384

    This article describes the train detector using ambient light and a photocell (NE555). The content is very simple, very helpful. Diagram showing the pr...

  • How to build DC-Coupled Audio Amplifier

    2014-12-20 13:28:4478

    Description Designs for audio amplifiers with DC coupling to the load are not often encountered these days, even though they offer definite advantages....

  • Visible-Light Audio Transmitter Circuit

    2014-12-20 13:17:47169

    In the visible-light transmitter, a 7805 voltage regulator is connected in a variable-voltage configuration, and an audio signal is fed to the common i...

  • LED Lights Change Color Schematic

    2014-12-20 13:05:4699

    LED color lamp circuit as shown. It from the power section, the color control of part and three-color LED array. Power part:by the bulkcapacitors C1, f...

  • Light Dimmer/Speed Control

    2014-12-20 12:55:19146

    A phase-controlled triac (HT-32) circuit provides control of effective voltage at load. Do not omit LI and C4 be cause they are for RFI suppression. Th...

  • Wide-range-digitally-controlled-variable-gain-amplifier

    2014-12-20 11:49:0576

    The circuit uses the LTC1043 in a variable gain amplifier which features continuously variable gain, gain stability of 20 ppm/?°C, and single-ended or...

  • 555 timer Led Flasher circuit

    2014-12-20 10:32:11511

    555 timer circuits This LED Flasher circuit is based on the 555 timer IC .The LED Flasher circuit diagram is very simple and require few external compo...

  • Car Cigar Lighter to USB Power Socket circuit diagram

    2014-12-20 10:18:5877

    Nowadays, almost all computer systems have logic blocks for working with a USB port. A USB port, in practice, is capable of supplying more than 100 mA ...

  • FLASHING LED ADVERTISING BADGE

    2014-12-20 09:51:0575

    This circuit is similar to Advertising Badge . It uses a CD4013 dual D Flip/Flop IC. The 74HCT74 IC in Flashing LED Advertising Badge #1 does not alway...

  • LED Sphere Your Cool Home Disco LED Light Ball

    2014-12-20 09:01:51170

    If youre looking for the Home disco LED light ball, then youve come to the right place. Well, the main goal for this project is to create a 3D spinning...

  • LED Torch

    2014-12-20 08:28:36105

    A common problem with small torches is the short life-span both of the batteries and the bulb. The average incandescent torch, for instance, consumes a...

  • LED Thermometer for Temperature Measurement

    2014-12-20 08:08:18120

    LED Thermometer Temperature Measurement Circuit Description The circuit given here is a precision LED bar graph Fahrenheit thermometer,which can be use...

  • 94% Efficient 25W White LED Automotive Headlamp Driver

    2014-12-20 08:06:59157

    View Full Size Image View Original Datasheet The LT3956 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regu...

  • Single Cell LED Flashlight

    2014-12-20 07:41:0589

    This is Single Cell LED Flashlight circuit. This circuit uses white LED that has best power-efficiency combination at about 20mA and requires abut 3.3V...

  • How to build LED Traffic Lights

    2014-12-20 06:55:04100

    Description The LED traffic Light circuit controls 6 LEDs (red, yellow and green) for both north/south directions and east/west directions. The timing ...

  • Automatic Head Lights Turn Off Circuit

    2014-12-20 06:48:1979

    Car Head Lights Turn Off Circuit Description This circuit when setup in a car automatically turns off the head light after a preset time after the igni...

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