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CFL Ballast for 26w/ Sprial Lamp 220VAC Input - The IRPLCFL5E reference design is an electronic ballast for driving 26W compact fluorescent lamps from 220VAC. The circuit provides all of necessary functions for preheat, ignition and onstate operation of lamp and also includes EMI filter and rectification stage. The circuit is built around IR2520D Ballast Control IC.
CFL ballast to drive LEDs - 04/26/07 EDN-Design Ideas A CFL ballast can drive a string of as many as 64 LEDs Design by Christian Rausch, Unterhaching, Germany
Child's lamp - Here is a mini emergency lamp that you can use as a tabletop lamp in your child’s study room. It is battery-operated and gives sufficient light for the child to move out of the room when power fails. The white LED in the circuit automatically turns on when light in the room goes off following a power cut. The LED gives a flashing light instead of glowing continuously to reduce power consumption. The circuit comprises __ Designed by D. Mohan Kumar
Christmas Decoration - This project flashes 18 LEDs at three different rates and you can use these to create a Christmas decoration of your choice. The circuit is kept simple (and cheap!) by using the 4060B IC which is a counter and oscillator (clock) in one package. The circuit requires a 9V supply, such as a PP3 battery __ Designed by John Hewes
Christmas Lights Tester - Like every year around the same time, I hurried to get my Christmas tree all set up and the first thing we do when the tree is 'standing' we like to hang the lights in the tree. Okay, better first test them before putting all 50 of them in the tree. Yep! Working beautifully. I started a carefully planned organization of the lights so they would be evenly divided over the branches. Now the second string of lights, tested, yep working. In the tree with them. Putting the plugs into the receptacle andoh no-- one series of them are on in full glory, all the others are out. Annoyed I tried to 'fix them' by trying to push each bulb further into their sockets. Still no go __ Designed by Jan Hamer
Christmas Star - Christmas just would not be Christmas if you do not put a flashing star on your Christmas tree. Here is the circuit of such a flashing star.Fig.1 shows the circuit...__ Electronics Projects for You
Christmas Star - This project started just before last Christmas when my daughters asked "why don’t we have any flashing Christmas tree lights?" So, while they were out shopping, my son and I grabbed a dozen LEDs, some ribbon cable and a microcontroller. While my son wired up the LEDs, I wrote some simple software. It was all installed and running when they came home after spending all my money (that’s why we didn’t have lights before) ! The smiles on their faces made it all worth while! __ Designed by © Grantronics Pty Ltd
Christmas-Tree Lights Tester - 12/23/99 EDN-Design Ideas Why is it that you always test 48 bulbs before you find the bad one in a 50-light string? This simple circuit allows you to divide and conquer, greatly reducing the time it takes to find the bad bulb. Design by William Dias, Brown & Sharpe, North Kingstown, RI
Circuit Delivers Dimming Control for White-LED Driver - 10/28/04 EDN-Design Ideas The demand for power in color cell-phone handsets is constantly increasing. New applications steadily emerge, making it imperative to reduce power consumption in the design. Examination of usage data shows thatthan 50% of the power Design by Wallace Ly, National Semiconductor, Santa Clara, CA
Circuit for remote lighting controller using a 433MHz AM keyfob transmitter - Here's the remote controlled garden lighting unit which I built for my house. It needed to control several lighting channels via a remote keyfob, and preferably include a timer to switch the lights on automatically in the evening etc. I decided to build a controller rather than buy one because 1) it was much cheaper, 2) it was fun and 3) it enabled me to include the timer facility, which wasn't available on any commercial units at reasonable cost. __ Designed by Hans Summers
Circuit forms fast, portable light pulser - 16-Oct-03 EDN-Design Ideas The absence of a fast one-shot multivibrator in the entire TTL family, as well as the low-voltage swing and unwieldy supply requirements of ECL, drove us to exploit the fast transition times and low propagation delays of F-series gates. The application called for the implementation of a compact, portable, fast light pulser for field testing fast photomultipliers in gamma-ray astronomy work Design by SK Kaul and IK Kaul, Bhabha Atomic Research Centre, Trombay, Mumbai, India
Circuit to enable cycling a string of Christmas lights - This circuit will enable you to cycle a string of Christmas lights , a beacon, or any other high or low voltage components when use with a relay of the proper rating.
Circuit uses Simple Circuit LED for Near IR Light - 09/01/98 EDN-Design Ideas NOTE
: File has many circuits, scroll down. You can successfully use LEDs as sources of near-infrared light. However, when you need a source of light with precisely controlled power, a feedback loop is necessary to compensate for the temporal and thermal changes of the LED parameters. Standard LED types come with neither these monitoring detectors nor an external monitoring photodiode to detect part of the emitted light and generate a feedback signal. The situation calls for some mechanical fixture to mount the photodiode. Design by Lukasz Sliwczynski, Marcin Lipinski, Institute of Electronics, Krakow, Poland
Clap Relay - Clap sensitive on-off Relay.3V Battery operated, small portable unit, __ Contact: Flavio Dellepiane, fladello @ tin.it
Classic Linear 5v Supply using 6.3VAC Transformer - There are times when you wish to control a pulse width modulation (PWM) signal with a DC voltage, ranging from 0v to 5v. This voltage is often created by a computer interface. The circuit below performs this voltage to PWM conversion. PWM signals are often . . . Hobby Circuit designed by David Johnson P.E.-October, 2010
Closet Light with Automatic 3-Minute Timeout - The circuit below is powered by three 1.5v alkaline AA cells. With a finger tap to the pushbutton trigger switch, a cluster of 6 wide angle white LEDs is turned on. The lights remain on for about 3 minutes, then will turn off. The circuit’s standby current is only a few microamps. A set of fresh batteries should last at least 200 light applications. The circuit uses a Schmitt trigger inverter and two transistors. When the pushbutton switch S1 is pressed, the 10uF capacitor C1 is discharged. . . Circuit by David Johnson P.E.-November, 2010
CMOS
Gate Implements Reverse Phase Control - 05/21/98 EDN-Design Ideas - (File has seeveral circuits, scroll down) The circuit in Figure 1 implements a "reverse" phase control, using only a single CMOS
4001 quad NOR gate. The circuit is known as a reverse phase control because, unlike with common TRIAC or SCR controls, conduction begins at the zero crossing of the ac sine wave. Timing of the turn-off point Design by JC Johnson, Lithonia Lighting, Decatur, GA
CMOS
IC Flashes LED - Judging from the numerous references I have received, this electronic circuit, hobby circuit seems to be rather popular. Many published circuits which flash LEDs need 3 or more volts. This electronic circuit uses only a single inexpensive C-MOS IC and . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000
Color Organ - This is a simple, one lamp colour organ. It is far less complicated then the Three Channel Colour Organ. It is simply a lamp controlled by an SCR. It can be built in a few minutes, and combined with other circuits to make some pretty neat effects. __ Designed by Aaron Cake
Color Organ - PIC Project This unit uses a PIC16F84 with an 8 bit A/D. The signal from both stereo channels is combined and digitized. Each of 5 frequency bands is processed using a 16 point FFT. Then the level of each channel is output as PWM (pulse width modulation) to a set of solid state relays __ Designed by Luhan Monat-Mesa Arizona
Color Organ - Schematic + Info + pictures __ Designed by Lennie Zink
Color Sensor - Colour sensor is an interesting project for hobbyists. The circuit can sense eight colours, i. e. blue, green and red (primary colours) ; magenta, yellow and cyan (secondary colours) ; and black and white. The circuit is based on the fundamentals of optics and digital electronics. The object whose colour is required to be detectedadded 10/05)
Color sensor - I built this color sensor to equip my third implementaton of brick sorter. Michael Gasperi presents such a sensor in an article of Nuts and Volts magazine. His circuit is based on an input multiplexor. Three CdS photo-resistors, connected to this multiplexor, receive light through RGB colored filters (cleverly done with Lego transparent bricks) . __ Designed by Philippe "Philo"Hurbain
Color Sensor for Robot - I'm developing a simple, active, color, object sensor for my robots based on three ultra-bright LEDs. An old-fashioned cadmium-sulfide sensor detects the brightness of the reflected red, green, and blue as each is turned on individually. __ Contact: David Cook
Colour (Sound) Organ - This is a simple, one lamp colour organ. It is far less complicated then the Three Channel Colour Organ. It is simply a lamp controlled by an SCR. It can be built in a few minutes, and combined with other circuits to make some pretty neat effects. __ Designed by Aaron Cake
Colour Sensor - Colour sensor is an interesting project for hobbyists. The circuit can sense eight colours, i. e. blue, green and red (primary colours) ; magenta, yellow and cyan (secondary colours) ; and black and white. The circuit is based on the fundamentals of optics and digital electronics. The object whose colour is required to be detected should be placed in front of the system. The light rays reflected from the object will fall on the three convex lenses which are fixed in front of the three LDRs. The convex lenses are used to converge light rays. This helps to increase the sensitivity of
Common Ground 3 Channel Color Organ for a Car - An Active Filter Design. __ Designed by G.L. Chemelec
Common HOT 3 Channel Color Organ for a Car - An Active Filter Design. __ Designed by G.L. Chemelec
Compact Fluorescent Lamp (CFL). Part 1 - Compact fluorescent lamps have some benefits in comparison with classic light bulbs. It is lower power consumption (to 80%) and much longer lifetime (5 to 15 times) . Disadvantages are longer starts mainly at more expensive types, __ Designed by Radio LocMan
Compact Fluorescent Lamp (CFL). Part 2 - Failures Common failure is broken capacitor C3. It is possible mainly at cheap lamps, where are used cheaper components for lower voltage. Whet the pipe doesn't lights up on time, there are risk of destroying transistors Q1 and Q2 and next __ Designed by Radio LocMan
Compact Fluorescent Lamp Driver - Operates from a 12V DC supply and can drive up to four 9W CFLs at full brightness. Use it as part of a solar power installation or anywhere you require good lighting without mains power.__ SiliconChip
Computer Controlled PWM Circuit - There are times when you wish to control a pulse width modulation (PWM) signal with a DC voltage, ranging from 0v to 5v. This voltage is often created by a computer interface. The circuit below performs this voltage to PWM conversion. PWM signals are often. . . Circuit by David A. Johnson P.E.-October, 2010
Control Room Light Intensity Digitally - 11-Nov-04 EDN-Design Ideas Many people favor different light and temperature settings for different rooms depending upon their mood or whether they are working or relaxing. The circuit in Figure 1 controls the intensity of the artificial light in a room and Design by Donal McNamara and Kieran Kelly Analog Devices, Limerick, Ireland
Control Your Holiday Lights with a Magic Wand - 12/16/11 EDN-Design Ideas A magnet waved past a Hall-effect sensor does the trick. This circuit allows you to turn on your holiday bulbs with a wave of the magic wand. The strings flash in sequence. At the heart of the idea is the magnetic wand. It gives the appearance of real magic. The main part of the circuit is a digital magnito-resistive sensor IC4 (Figure 1) . Typical Hall-effect sensors are not suitable for this design because they do not work over an extended sensing distance. They also do not switch when excited by either magnetic pole. The Honeywell 2SS52 sensor works from either the north or south pole. It has good sensitivity to a magnetic field. Design by Vladimir Rentyuk
Controlled Up/Down Ramping Light - There are times when you want a lamp to gradually change from dark to light and from light to dark, with each push of a pushbutton switch. The circuit below performs this control function using a flip/flop and a classic pulse width modulation or PWM . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2009
Controller for a 9v Powered Xenon Photoflash - This 9v battery powered circuit is designed for remote control flash needs. A charge control circuit turns off the high voltage generator when the photoflash capacitor is fully charged. A neon lamp is included to indicate when the system is ready to flash . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000
Controller provides multiple alarm-driver formats - 01/15/98 EDN-Design Ideas Using a piezoelectric element for alarm applications offers low cost, low power, and flexibility. By coupling this element with a 12C508 programmable controller (Microchip Technology, Chandler, AZ], you can implement an eight-pin alarm generator. This approach provIdeas multiple driver formats with a minimum of additional cost and footprin Design by William Grill, Riverhead Systems, Littleton, CO
Controlling Devices through Webiopi Interface - In the evening, with the day’s work over, your office is locked and you are about to leave for home. Suddenly, you notice that some of the lights in your office...__ Electronics Projects for You
Convert Solar Powered Light to Flasher - The circuit converts an off-the-shelf solar powered LED path light from producing a steady state light to one that produces a flash. This circuit includes a tiny dual Schmitt trigger inverter IC which form the pulse generator and the daylight sensor circuit. The circuit produces a positive pulse, which feeds the constant current LED driver circuit.. . . Circuit by David Johnson P.E.-March, 2010
Converter Drives Fluorescent Tube - 03/31/94 EDN-Design Ideas In the last few months, several designers have published circuits for cold-cathode fluorescent-tube (CCFT) power supplies, and a specialized power-supply IC is also now available. However, a significant number of CCFT applications Design by Steven C Hageman, Calex Manufacturing Co, Concord, CA
Courtesy Light - Two LED-eyes follow the rhythm of music or speech; 3V Battery-operated device suitable for pins or badges __ Contact: Flavio Dellepiane, fladello @ tin.it
Courtesy Light Delay for Cars - Simple circuit has an adjustable delay from 7-40s and fades the lights out at the end of the delay period. And the same circuit suits all cars.__ SiliconChip
Cupboard Light - Here is a simple circuit that can temporarily illuminate your cupboard or other such usually dark places where mains connection is either not possible or not worthwhile. The circuit is nothing...__ Electronics Projects for You
Cupboard Lights Switch - This Cupboard lights circuit is an automatic White LED lamp used to illuminate the interior of cupboard to search things. The lamp automatically turns on when the door of the cupboard opens and stays on for three minutes then turns off. The circuit uses the popular timer IC NE 555 for the time delay. Components R1 and C2 gives __ Designed by D Mohankumar |
