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  • Mains operated LED night lamp

    2014-12-22 05:10:52139

    Description. Here is a simple and powerful LED based night lamp circuit that can be operated directly from the 230V mains supply. The are total 24 whit...

  • Low Cost LED Blinker circuit

    2014-12-22 04:41:07187

    Here is a simple LED Alternate flasher for decoration purpose. The 20 High bright LEDs flashes alternately giving a brilliant colour display. The circu...

  • LED Bar-Graph Level Gauge (MAX931)

    2014-12-22 04:00:47120

    This article describes the LED Bar-Graph Level Gauge (MAX931). The content is very simple, very helpful. Components in this article can help you unders...

  • Digitally Controlled Potentiometers

    2014-12-22 03:42:48170

    Introduction A digitally controlled potentiometer (DCP) is a resistance chain realized in CMOS with a number of equally-spaced taps where the tap conne...

  • LM3404 LED driver circuit

    2014-12-22 03:30:24362

    Led driver circuits Using the LM3404 are monolithic switching regulator can be designed a very simple constant current driver for high power LEDs. This...

  • LED Beacon With Timer, Refer to IRF3205

    2014-12-22 02:45:42187

    The proposed device is intended to refer to any temporary objects, hazardous locations, drawing attention to favor size or abnormally located subjects....

  • How to build Ringing Phone Light Flasher

    2014-12-22 02:45:41109

    I have received several emails asking how to connect up some lights so that when the phone rings, they flash. This is very useful in a situation were t...

  • AC-Powered LED

    2014-12-22 02:32:50103

    Usually, LED is powered by DC supply, but this circuit can make the LED can be powered by AC supply. This circuit can be used as power indicator for Wa...

  • Digitally-controlled-voltage-reference

    2014-12-22 02:29:2277

    This circuit shows a simple method of achieving a voltage reference which can be trimmed using an 8bit DAC with an on-chip voltage reference. The analo...

  • Light Actuated Relay Circuits (C945)

    2014-12-22 01:53:30256

    This article describes the Light Actuated Relay Circuits (C945). The content is very simple, very helpful. Components in this article can help you unde...

  • LED Display for On-Off battery indicator

    2014-12-22 01:48:16304

    This circuit uses LED 2 pcs. show something On Off of or the circuit that use Battery. By LED D1 flasher , when open and D2 flasher when open. While op...

  • Constant Current Source LED Drive

    2014-12-22 00:42:06444

    This is a Constant Current Source LED Driver, When the LED driver Upper-NPN is driven by a voltage thru 4.7K the LED lights up. Assume that the Lower-N...

  • Bi-color LED indication

    2014-12-21 23:31:01464

    Bi-color LEDs are same LEDs as uni-color just there are more than one LED housed in one package. Bi-color LEDs may have two or three leads depending on...

  • Automated Crib Lights circuit (BC238)

    2014-12-21 22:51:13112

    Low supply (12V) for children safety Circuit diagram: Parts: R1___________150K 1/4W Resistor R2,R9,R14_____22K 1/4W Resistors R3,R11_______220K 1/4W Re...

  • NCP3065/NCP3066 Drive LED Circuit

    2014-12-21 22:41:39128

    ON SemiconductorNCP3065/NCP3066for multi-mode LED controller with integrated 1.5A switch can be configured to buck, boost, reverse (drop - boost), and ...

  • 73 MHz Hallogene Lamp Radio-Controlled

    2014-12-21 22:37:0975

    Circuit diagram This circuit is a 73 MHz Hallogene Lamp Radio-Controlled. The purpose of it is to control the power state of a hallogene lamp by a remo...

  • Flashing High Intensity LED 3rd Brake Light (LM239ADR)

    2014-12-21 22:19:46325

    This article describes the Flashing High Intensity LED 3rd Brake Light (LM239ADR). The content is very simple, very helpful. Components in this article...

  • Manual Adjustable LED Driver

    2014-12-21 22:05:28103

    In many electronics-level adjustments such as LED drivers for LCD panel backlight controls, we can useAD5228. A manually adjustable LED driver is shown...

  • Create multicolored LEDs (LF347M)

    2014-12-21 21:33:45124

    This article describes the Create multicolored LEDs (LF347M). The content is very simple, very helpful. Components in this article can help you underst...

  • Detecting Color With a Reverse LED And a High-Gain Op-Amp Ba

    2014-12-21 21:23:3489

    Description: The following circuit shows about detecting color with a reverse LED and a high-gain op amp. This circuit based on the LMC6482. Features: ...

  • Microphone-Controlled Voice-Activated Switch

    2014-12-21 21:06:59176

    An electret microphone feeds a bandpass filter circuit (IC1A), then feeds a comparator, which in turn drives Ql. Ql is a switch that conducts when audi...

  • Very cheap ac light dimmer

    2014-12-21 20:51:5087

    You may had saw to a complicated AC light dimmer circuit ago. Now lets look simple, but useful, fairly good. This circuit uses a capacitor in series wi...

  • Dark-activated LED or Lamp Flasher (BC337)

    2014-12-21 20:40:12126

    This article describes the Dark-activated LED or Lamp Flasher (BC337). The content is very simple, very helpful. Components in this article can help yo...

  • Automobile White LED Light(7805)

    2014-12-21 20:38:25122

    This article briefly describes the Automobile White LED Light (7805). This principle is easy to understand, but also very practical. Depth understandin...

  • The Use of Solar-Powered LED Lamps

    2014-12-21 20:18:00101

    The Use of Solar-Powered LED Lamps The need for installing solar-powered LED bulb is explained in this article. The advantages and components needed fo...

  • Direct Coupled On/Off Touch Switch

    2014-12-21 20:17:2593

    The following touch switch circuit uses a CA3240 dual BiMOS op amp to sense small currents flowing between the contact points on a touch plate. Since t...

  • Colorful Christmas Lights Circuit

    2014-12-21 20:04:1179

    This article we introduce a simple cheap Christmas circuit. The circuit is based on a CMOS Hex Inverter IC CD4069UB sequentially switched to provide fo...

  • Fuse failure alarm with 2 led light.

    2014-12-21 19:45:45130

    This circuit will show the performance of theequipment,or Check the fuse in the circuit.The circuit is small and the power supply voltage of all kinds....

  • Two mode night light circuit

    2014-12-21 19:45:3791

    ?Description. Here is a versatile night light circuit that can be used in two modes. The dimmer mode and a flashing mode. The circuit is based on dual ...

  • Automatic night-light feeds directly from the ac line

    2014-12-21 19:36:4889

    Abel Raynus, Armatron International Inc, Malden MA There are many approaches to the problem of activating a light when it becomes dark, and a recent De...

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