Night Lamps - Here are two night lamp circuits using LEDs. One could be used as a night-vision clock and the other as a TV lamp. Both the circuits are AC operated and consume...__ Electronics Projects for You Night Light - This circuit for an electronic night light was submitted by Adam from Canada. I have provided the notes __ Designed by Andy Collison
Night Light from White LED - As many of you know, I have a pet peeve with poorly made LED night lights. Often, the light from the LED quickly fades, so within months, the light is useless. I have posted several versions of modified night lights using higher quality components. . . Circuit by David Johnson P.E.-November, 2008
Night Light Saver using AT89C2051 - This new version has internal Ni-MH battery backup, reset button and simple time setting. Now the circuit board was embedded with lamp fixture. Preset turn on period is from 18:00 to 22:00 everyday. You may let the saver turn on whenever you want. The period of time on can be reprogrammed with sdcc. Howvere this project is not recommended for beginner. The circuit uses transformerless supply and no galvanic isolation! __ Designed by Wichit Sirichote
Night Light Saver V5.0 - I have designed a device that controls a night light at home. The saver uses 2051 chip and a small TRIAC. The saver features low-cost, simple installation, no battery backup, and save energy. __ Designed by Wichit Sirichote
Night Light Saver V6 - Latest design night light saver, built with sdcc __ Designed by Wichit Sirichote
Night Rider 2 - this version has been built and testedincludes drive circuitry and pcb __ Contact: P. Townshend EduTek Ltd
Night-Light Uses a Photoresistor to Detect Dusk - 12/15/11Design Ideas: You can adjust this battery-powered circuit for different levels. Design by Chau Tran, Analog Devices, Malden, MA
No Hassel 3rd Brake Light - This circuit is NOT a pulser or flasher! What's so special about this circuit? Well, the first third-brake light I installed I had to pull a wire from the Third Brake Light all the way underneath the carpet to the brake-pedal-switch and I thought it would be easier to pluck the signal of both brakelights via the trunk. Bench-test your circuit first and apply power to the circuit, __ Designed by Tony van Roon VA3AVR
Nocturnal Animals Whisker - A low-rate flashing lamp drives away undesired visitors; Automatic on-off operation __ Contact: Flavio Dellepiane, fladello @ tin.it
Non-Dimmable Fluorescent Ballast - Efficient fluorescent lamps and magnetic ballasts have been the standard lighting fixture in commercial and industrial lighting for many years. Several lamp types, rapid start, high output, and others are available for cost effective and special applications. This user guide covers operation and development details of the non-dimmable version of our fluorescent ballast for operating a variety of lamps that are available today. __ Designed by AT89RFD-10 / EVLB002
Old idea, new twist-Magic Lamp - You have probably seen "magic lamp" circuits in which an ordinary incandescent bulb is lit by a match. These circuits rely on a hidden temperature or light sensor and are not particularly interesting. I decided to make a magic lamp, __ Contact: Charles Wenzel of Wenzel Associates, Inc.
One Cell Flashes White LED - 12/11/03 EDN-Design Ideas Many portable appliances and other products that must operate from a single cell are restricted to working at very low voltages. It is thus difficult to drive white LEDs that typically have a forward voltage of 3 to 5V. The ability Design by Anthony Smith, Scitech, Biddenham, Bedfordshire, UK
One-Watt White LED Night Light - As many of you know, I have a pet peeve with poorly made LED night lights. Often, the light from the LED quickly fades, so within months, the light is useless. I have posted several versions of modified night lights using higher quality components. This circuit is yet another version, which produces much more light than those other designs. . . . Hobby Circuit designed by David A. Johnson P.E.-November, 2008
Optical Filter using Color Film Negative - This isn’t an electronic circuit but the file shows the curve for an optical filter made from exposed color film. The material blocks most visible light but is very transparent to 880nM infrared light. Kodak 100ASA is exposed to "cool white" fluorescent light for about 5 seconds . . . Hobby Circuit designed by David A. Johnson P.E.-January, 1998
Opto-Isolated logic level trigger for general strobe applications - Schematic only, no circuit description.
Ornamental Flashing LEDs - This circuit can flash three sets of LEDs with different levels of Flashing. It can be used as Ornamental displays. The circuit uses a simple Astable multivibrator built around the popular timer IC NE555. Resistors R1, R2 and capacitor C1 determines the output frequency. When the output becomes high, Red LEDs lights first. When __ Designed by D Mohankumar
Outdoor Lighting Controller - When you step out of your brightly-lit house into the darkness, it takes a while for your vision to adjust. A solution to this problem is this outdoor light with automatic switch-off. As a bonus, it will also make it a little bit easier to find the keyhole when returning late at nightmust register on this site __ Designed by Published in Elecktor July/Aug, 2010
Parked-Vehicle Highway Flasher - Often, at night, a speeding vehicle rams into another vehicle parked at the edge of a highway. Cars have parking flashers, but trucks, buses and loading rickshaws rarely have any form...__ Electronics Projects for You
PC controls light dimmer - 08/19/99 EDN-Design Ideas Control one light dimming from PCUsing the simple circuit in Figure 1 , you can control the light intensity in your room or work area from your PC. The heart of the circuit is a low-power D/A converter that converts digital words from a computer's parallel port to analog-voltage signals. Design by Afshin Mellati
PC Parallel Port Output Capabilities - includes instructions how to connect a relay to PC parallel port __ Designed by Tomi Engdahl
Phone Light Flasher - This is very useful in a situation were there is lots of noise and it is impossable to hear the phone, such as a workshop. Here is such a device. The ring detect part of this circuit came from [url]http://www. hut. fi/Misc/Electronics/circuits/telephone_ringer. html[/url]. Notes: 1. You may need to use a lower voltage zener for D1 and D2.2. You can use a regular relay instead of a solid state relay, but the arcing accross the contacts may destroy it pretty quickly.3. Be very sure that you have not accidentally connected 120V to the phone line when building and installing this __ Designed by Aaron Cake
Photo Electric Street Light - This is basically a Schmitt Trigger circuit which receives input from a cadmium sulfide photo cell and controls a relay that can be used to switch off and on a street lamp at dawn and dusk. I have built the circuit with a 120 ohm/12 volt relay and monitored performance using a lamp dimmer, but did not connect the relay to an outside light. The photo cell should be shielded from the lamp to prevent feedback and is usually mounted above the light on top of a reflector and pointed upward at the sky so the lamp light does not strike the photo cell and switch off the lamp. The photo cell is __ Designed by Bill Bowden
Photo Flash Charger Minimizes Parts Count - 10/22/98 EDN-Design Ideas Photo-flash and strobe devices operate by discharging a high-voltage capacitor into a bulb. Charging the capacitor from a battery or other low-voltage source requires a step-up DC/DC converter to boost the voltage, typically to 300V. One way to generate the high voltage Design by Steven Chenetz
Photoflash Capacitor Charger has Fast Efficient Charging & Low-Battery Drain - DN303 Design Notes__ Linear Technology/Analog Devices |