Ballast that can Be Dimmed from a Domestic (Phase Cut) Dimmer.:  A system has now been developed, based around the IR2156, where the ballast is able to operate with minimal flicker over a considerable portion of the adjustment range of a dimmer and the light output may be controlled over this range from maximum output down to around 10%.  (circuit design added 3/05)

Basic Infrared Light Train Detection:  (Electronic circuit added 7/03)

Bass Beat Extractor:  an automatic gain control circuit followed by a low pass filter, converts the beat into a sharp pulse suitable for triggering the strobe or chaser (Electronic Schematic / circuit added 4/02)

Battery Powered Night Lamp:  Ultra-Low current drawing1.5 Volt battery supply (Circuit added 9/04)

Beat Tracking Strobe:  project description using AT90S8515 microcontroller and some electronics (Electronic Schematic / circuit added 4/02)

Bedside Lamp Timer:  (Circuit added 9/04)

Bells Ring Generator:  3-Circuit options Can be synchronized to Christmas tree flashing lights (Circuit added 9/04)

Bicycle Back Safety Light:  Flashing13 LED unit,3V supply Also suitable for jogger/walkers (Circuit added 9/04)

Bidirectional Photoelectric System:  Detects and counts inputs and outputs.  Suited to control Lamps, Household Appliances etc. (added 03/05)

Black Light:  (circuit added 7/02)

Block Occupancy Detector Helper:  (Electronic circuit added 7/03)

Brightness Control for Small Lamps:  Switching operated 1.5V bulbs - Portable unit, 3V battery supply (Circuit added 9/04)

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 the necessary functions for preheat, ignition and onstate operation of the lamp and also includes the EMI filter and the rectification stage. The circuit is built around the IR2520D Ballast Control IC.  (circuit design added 3/05)

Child's Lamp:  (Electronic Circuit / Schematic added 10/04)

Circuit uses Simple LED for Near IR Light:  09/01/98 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)  

CMOS Gate Implements Reverse Phase Control:  05/21/98 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)  

Color Organ #1:  make different colored bulbs light at different frequencies of music, connects to speaker outputs (Electronic Schematic / circuit added 4/02)

Color Organ #2:  one lamp color organ (Electronic Schematic / circuit added 4/02)

Color Organ #3:  makes3 lights to blink and flash to music (Electronic Schematic / circuit added 4/02)

Color Organ Light :  This circuit works REALLY well. Notice how it will fire even in complete silence. This provides a sort of automatic gain control.   (added 2/05)

Colour (Sound) Organ:  (added 04/05)

Controller Provides Multimode Phase Control:  12/12/97 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)   --16C508 multichip controller, you can implement a phase controller that provides a two-key, indexed processor for ac power

Courtesy Lamp:  15 seconds delayed switch-off for220-Volt AC lamp, a good idea for bedroom lamps (Circuit added 9/04)

Dancing LEDs:   A LED sequencer, following the rhythm of music or speech 9 Volt Battery-operated portable unit (Circuit added 9/04)

Dark Activated Switch or Porch Light Switch:  (added 6/03)

Dark Activated Switch:  (added 04/05)

Dark/Light Activated Relay:  (added 10/02)

Dark-Activated 230V Lamp:  Compact circuitry using small-size parts only.  Can be wired in parallel to existing switches. (circuit design added 3/05)

Dark-Activated LED or Lamp Flasher:  Simple photo-sensitive circuit - 3V battery supply (Circuit added 9/04)

Darkness Monitor :  (added 11/03)

Day and Night Infrared Detection:  (Electronic circuit added 7/03)

Digi Pack DMX 512 Lighting Controller:  (added 04/05)

Digital Dimming DALI Ballast for 32W/T8 110V Input:  This reference design is a high efficiency, high power factor, digital dimming electronic ballast designed to drive rapid start fluorescent lamp types. The design contains an active power factor correction circuit for universal voltage input as well as a ballast control circuit using the IR21592. The design also includes a PIC16F628 microcontroller and an isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).  (circuit design added 3/05)

Digital Dimming DALI Ballast for 36W/T8 220V Input:  This reference design is a high efficiency, high power factor, digital dimming electronic ballast designed to drive rapid start fluorescent lamp types. The design contains an active power factor correction circuit for universal voltage input as well as a ballast control circuit using the IR21592. The design also includes a PIC16F628 microcontroller and an isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).  (circuit design added 3/05)

Digital Timer Light Switch :  Typical circuit representative of those used in most light switch type digital timers. The timer module is normally a PIC or custom chip, and it syncs to the AC line so that a trigger pulse can be supplied at the right moment. (added 2/05)

Digitally Addressable DALI Dimming Ballast App.:  Microchip Application Note - Published 10-Apr-02   (added 2/06)

Digitally Addressable DALI Dimming Ballast:  (added 04/05)

Dimmer Circuit for Normal Light Bulbs:  (added 9/02)

Dimmer Switch:  This dimmer switch is suitable for230-Volt incandescent lamps with a total power of up to300-Watts. The circuit is wired in series with the lamp so it can directly replace the wall switch. (Electronic Schematic / circuit added 4/02)

Dimming AC Incandescent Lamps using a PIC10F200:  Microchip Application Note - Published 22-Nov-05   (added 2/06)

Disco Light Controller:  (Electronic circuit added 7/03)

Disco Lights:  software and hardware for controlling disco lights from your PC (Electronic Schematic / circuit added 4/02)

DMX Lighting and Special Effects:  (Electronic circuit added 7/03)

Dome Lamp Dimmer:  Efficiently dim the cars dome or map light (low voltage light), PDF file (Electronic Schematic / circuit added 4/02)

Dome Light Dimmer for Cars:  Usually when the car door is closed, the dome light just goes OFF. With this circuit, you can have our dome light fade slowly in brightness and finally go OFF. (Electronic Schematic / circuit added 4/02)

Dome Light Dimmer using MIC4680 Switching Regulator:  simple circuit which outputs +5-Volt (Electronic Schematic / circuit added 4/02)

Dome Light Dwell Extender/Dimmer :  allows you to dim your dome light and keeps the dome light of your automobile on after you close the door (Electronic circuit added 5/02)

Dual Alternating Flashing Light Circuit:  (Electronic circuit added 4/05)

Dual Monostable Drives Quasiresonant Inverter:  02/17/97 EDN-Design Ideas / (circuit / schematic added 2/03) A zero-voltage-switching (ZVS) controller usually integrates a one-shot circuit, embodied in a VCO system. An error amplifier monitors the output voltage and adjusts the VCO's off-time to keep the output value at a constant level. Each on-time period commences as soon as the primary voltage drops to zero, thus eliminating on/off commutation losses associated with the switching element. The controller also incorporates other convenient features, such as MOSFET drivers, a voltage reference, and overvoltage and undervoltage lockouts. In low-cost circuits, such a complex architecture can lead to a prohibitive cost, especially if you don't need the cited features (in open-loop systems, for instance). Figure 1 shows an 8W, ZVS fluorescent-lamp converter made from two low-cost ICs, a CD4538 and an LM393....

Dual Tandem Flashing Light Circuit Powered by a 9 Volt Battery:  (Electronic circuit added 4/05)