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  • LED based transistor tester

    2016-04-24 19:40:2959

    Description. Here is the circuit of a very simple transistor tester which used two LEDs for displaying the condition of a transistor. Both PNP as well ...

  • Simple Led Flasher Circuit Using a Transistor

    2015-01-11 03:13:0776

    LED flasher circuit is a classic two-transistor flip flop. Bagun in the circuit of two transistors, two capacitors, four resistors, and two LEDs. Where...

  • Sealed-Lead Acid Battery Charger (UC2906)

    2014-12-23 23:51:05320

    This article describes the Sealed-Lead Acid Battery Charger (UC2906). The principle is very simple, very practical. The circuit components can help you...

  • Light detector CIRCUIT (LM3909)

    2014-12-23 23:33:10243

    This article describes the Light detector CIRCUIT (LM3909). The content is very simple, very helpful. Components in this article can help you understan...

  • Li-Ion Driver for 8 White LEDs (TPS61161)

    2014-12-23 23:18:54151

    This article describes the Li-Ion Driver for 8 White LEDs (TPS61161). The content is very simple, very helpful. Components in this article can help you...

  • Flashing LED Circuit

    2014-12-23 23:16:57166

    Flashing LED Circuit A Circuit that flashes an LED on and off. Overview This circuit uses the 555 timer in an Astable operating mode which generates a ...

  • LED Scanner circuit

    2014-12-23 22:46:47183

    Here is a simple LED chaser simulating a scanner through the back and forth light effect. It used high bright White LEDs to give the chaser effect. The...

  • Sound Controlled Toggle Switch

    2014-12-23 22:31:49116

    Here is a simple toggle switch that can be operated through sound signals such as whistle or clap. The output of the toggle remains either low or high ...

  • Temperature controlled LEDs

    2014-12-23 22:09:31146

    Description. The circuit is nothing but two LEDs (D1 and D2), whose status are controlled by the temperature of the surroundings. The famous IC LM35 is...

  • AC lights dimmer with triac (2N5445)

    2014-12-23 22:04:12261

    This article describes the AC lights dimmer with triac (2N5445). The content is very simple, very helpful. Components in this article can help you unde...

  • Security Light

    2014-12-23 21:59:40228

    Moderately priced Passive Infrared PIR Sensor modules are now widely available. By using these readymade and pre-configured PIR sensors, even an averag...

  • Five-Decade Dynamic Light-Level Meter (LM114)

    2014-12-23 21:22:25118

    This article describes the Five-Decade Dynamic Light-Level Meter (LM114). The content is very simple, very helpful. Components in this article can help...

  • Love test game circuit by 8 LED

    2014-12-23 21:19:21116

    This circuit uses the nand gate IC number is 4011B per Clock signal generator circuit, feeding it with the pin number 14 of the IC counter circuit 4017...

  • Light Detector (NE555)

    2014-12-23 20:59:18125

    This article describes the Light Detector (NE555). The content is very simple, very helpful. Components in this article can help you understand better ...

  • Two LED flashing alternate Display (LM324)

    2014-12-23 20:51:27391

    This article describes the Two LED flashing alternate Display (LM324). The content is very simple, very helpful. Components in this article can help yo...

  • High Precision Voltage-Controlled Oscillator (VCO)

    2014-12-23 20:36:04118

    This voltage-controlled oscillator circuit is very compact and has a good linearity. The author said that the precision could be better than 0.01% If t...

  • Visible Light Transceivers Based on PIC12F508

    2014-12-23 19:32:09146

    The PIC12F508 device from Microchip Technology is low-cost, high-performance, 8-bit, fully-static, Flash-based CMOS microcontrollers. The PIC12F508 emp...

  • Strobe Light

    2014-12-23 19:31:28163

    Strobe lights are widely used by disco lovers to create wonderful visual effects in disco halls and auditoria. The circuit of a battery operated portab...

  • LED Flasher(ILC7660)

    2014-12-23 18:59:55138

    This article describes the LED Flasher (ILC7660). The content is very simple, very practical. The components of the article can help you understand bet...

  • Voltage Controlled Oscillator with Varactor

    2014-12-23 18:55:27441

    This is a Voltage Controlled Oscillator? (VCO) circuit. This circuit is based on Hartley oscillator. The frequency depend on the value of C1 and L1. Th...

  • AVR controlled signal generator-1 layer PCB prototype

    2014-12-23 18:52:14164

    This is continuing of thread of making AVR controlled signal generator. This section is devoted for 1 layer PCB prototype making using ultraviolet ligh...

  • Two LED Flasher by 555 Timer

    2014-12-23 18:42:51162

    Figure 1 The purpose of building this circuit is to create a LED flasher with alternating sequence from the two LED s where the operation is based on t...

  • 3.3V Baseband Video Splitter/Cable Driver (DC Coupled)

    2014-12-23 18:34:13292

    View Full Size Image View Original Design Note A simple video splitter application using an LT6206. Both amplifiers are driven by the input signal and ...

  • David's Duodecal Delight - 12AE10 Regenerative Radio

    2014-12-23 17:32:31120

    Introduction Hello honored visitor! Thank you for your visit. Todays radio is built with a Compactron tube. While the compactron was the big idea of so...

  • 1us Light Pulse Discriminator Plus F to V Converter

    2014-12-23 17:24:3870

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  • Light-controlled-one-shot-timer

    2014-12-23 17:18:3071

    This circuit uses Al of the CA3290 BiMOS dual voltage comparator to sense a change in light diode current. A2, a one-shot timer, is triggered by the Al...

  • Interactive Toy Traffic Lights(74C14)

    2014-12-23 17:03:53104

    This article briefly describes the Interactive Toy Traffic Lights (74C14). This principle is easy to understand, but also very practical. Depth underst...

  • Led Flasher Circuit Using 555 IC

    2014-12-23 16:31:22111

    LED flasher circuit can be built based on 555 IC. Using 555 IC, the flashing rate can be more flexible to adjust. This LED flasher circuit is similar t...

  • USB LED Lamp circuit.

    2014-12-23 16:23:30161

    USB Lamp Circuit Description. Here is a simpleUSBpowered lamp that can be used to light your desktop during power failures. The circuit operates from t...

  • LED VU meter increase

    2014-12-23 16:16:50374

    The circuit will increase the input signal to a voltage signal circuits as much as two times.To affect the audio signal into more valuable.This makes a...

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