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  • Use an LED Matrix Horizontally(CD4017)

    2014-12-22 18:29:47131

    This article briefly describes the Use an LED Matrix Horizontally (CD4017). This principle is easy to understand, but also very practical. Depth unders...

  • Pseudo Random Lights

    2014-12-22 17:33:13765

    Here is an interesting application for random light display. With this circuit as many as 72 LEDs of different colors can be used. LEDs can be fixed at...

  • Detect ringing signal tone with light and sound

    2014-12-22 16:43:39143

    The detect ringing signal tone circuit with light and sound.It is easy to use and good quality, Do not enter the power supply. Which as Detect ringing ...

  • Microchip microcontroller dsPIC30f4013 blink LED example us

    2014-12-22 16:04:0476

    Microchip microcontroller dsPIC30f4013 blink LED example using timer – complete project 4.4 out of 5 based on 5 votes. It is common opinion that “b...

  • Organic LED. The exciting display device

    2014-12-22 15:38:1782

    Organic LED technology, the commonly called OLED is a solid state semiconductor light emitting diode having a thickness of 100 to 500 nanometers. It is...

  • White LED Lamp(LM2585T-ADJ)

    2014-12-22 15:24:28140

    This article briefly describes the White LED Lamp (LM2585T-ADJ). This principle is easy to understand, but also very practical. Depth understanding of ...

  • Power saving LED circuit

    2014-12-22 15:02:36128

    If an LED pilot lamp is used in battery powered circuits, it will unnecessarily consume power. This circuit lights an LED at power on and after one min...

  • Visible-Light Receiver Circuit

    2014-12-22 14:30:36157

    This receiver for amplitude-modulated light signals uses phototransistor Ql mounted in a parabolic reflector (to increase range). Any npn phototransist...

  • Digital Volume Controlled Audio Preamplifier

    2014-12-22 12:35:1184

    Figure 1 The circuit was designed to build a volume control that is operated digitally on an audio preamplifier circuit. Preamplifier – a device typi...

  • Digital Led Voltmeter

    2014-12-22 12:28:13122

    The voltage to be measured is digitized in an analog-to-digital (A/D) converter and then displayed in three decimal d igits. The display consists of th...

  • How to build Keypad Controlled Switch No. 2

    2014-12-22 11:46:1077

    Description The circuit is drawn with a 12-volt supply - but it will work at anything from 5 to 15-volts. All you have to do is choose a relay suitable...

  • 10 Dancing LEDs circuit diagram

    2014-12-22 11:20:37102

    This is thecircuitof dancing LEDs which consists of 10 units LEDs. The circuit works like aaudiolevel meter. The LEDs will be dance sequence with the s...

  • Mock Flasher LED circuit

    2014-12-22 11:02:42125

    This simple Mock Flasher LED simulates the indicator of a sophisticated Alarm system. It can be placed in doors, gates and vehicles to confuse intruder...

  • 7 Segment LED Counter(LM358D)

    2014-12-22 10:38:2693

    This article describes the 7 Segment LED Counter (LM358D). The content is very simple, very practical. The components of the article can help you under...

  • Courtesy Light

    2014-12-22 10:20:0679

    15 seconds delayed switch-off A good idea for bedroom lamps Circuit diagram Parts: R1 470R 1/2W Resistor R2 100K 1/4W Resistor R3 1M5 1/4W Resistor R4 ...

  • How to build LED Torch

    2014-12-22 10:18:42137

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

  • Filament Light Dimmer Circuit

    2014-12-22 09:51:30453

    Filament Light Dimmer Circuit This simple triac dimmer can be used to control incandescent filament lamps up to 200W. The circuit operates on the phase...

  • Light-Wave Voice-Communication Transmitter Circuit

    2014-12-22 09:22:4682

    This transmitter uses a 741 op amp as a high-gain audio amplifier, which is driven by a microphone. The output of the 741 is coupled to Ql, which serve...

  • Crystal Radio Diode Duo Dynamic DeLuxe DX Delicious Delight&

    2014-12-22 08:54:07184

    Introduction Hi Friends. After my quick dabble with space wound cylinder coils in my #70 set, I am firmly back in the familiar territory of the spider ...

  • AVR controlled signal generator-skeleton board

    2014-12-22 08:37:4986

    This is continuing of threadAVR controlled signal generator.In earlier post 1 layer PCB prototype I described a little about making PCB of this small p...

  • 10 LED Flashing using CD4017

    2014-12-22 08:23:12235

    This the circuit light led flashing ,with show of 10 LED. By use integrated number circuitCD4017perform be Decade Counter/Divider with 10 Decoded Outpu...

  • Lighted-display-brightness-control

    2014-12-22 08:07:0375

    This circuit provides a very low cost method of controlling light levels. Circuit power is obtained from a relatively high source impedance transformer...

  • SSM2164 Based Voltage Controlled Amplifier

    2014-12-22 07:21:42739

    SSM2164 Based Voltage Controlled Amplifier Overview Analog Devices SSM2164 quad VCA integrated circuit is intended for audio control applications such ...

  • 73 MHz Hallogene Lamp Radio-Controlled Circuit Diagram

    2014-12-22 06:50:5170

    Descriptipn: The following circuit shows about 73 MHz Hallogene Lamp Radio-Controlled Circuit Diagram. Features: output of the 5V regulator, powered by...

  • How to build Thermostat for 1KW Space Heater (SCR controlled

    2014-12-22 06:40:2287

    Description Below is a thermostat circuit I recently built to control a 1300 watt space heater. The heater element (not shown) is connected in series w...

  • Sound Activated Lights(BC549 )

    2014-12-22 06:35:53126

    This article briefly describes the Sound Activated Lights (BC549). This principle is easy to understand, but also very practical. Depth understanding o...

  • L200 Light Controller

    2014-12-22 05:43:4284

    This is a circuit ofL200light controller. The output of this circuit is controlled by the surrounding environments brightness. If the brightness increa...

  • LDR LED Pair Smoke Detector and Alarm ( LM1801)

    2014-12-22 05:19:31103

    This article briefly describes the LDR LED Pair Smoke Detector and Alarm (LM1801). This principle is easy to understand, but also very practical. Depth...

  • 2uS Light Pulse Receiver

    2014-12-22 05:13:1473

    Although theLF357is an obsolete part, this circuit gives you an idea how to build a sensitive modulated light detector with high ambient light immunity...

  • Up-Controlled Negative Voltage Converter

    2014-12-22 05:12:1069

    This circuit was used to produce a variable negative voltage for contrast control of an LCD displa y. A 74F374 generates a square wave that is ac coupl...

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