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Fluorescent Lamp Intensity Modulator - This hobby circuit was designed to experiment with using small fluorescent lamps as a broad pattern source of modulated light. This hobby circuit hits the small lamp with narrow 1us pulses at a rate of 10KHz. Each pulse launches about 10 watts of visible light. The lamp starting method is a bit crude but the circuit does work. . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000 Fluorescent Lamp Inverter - This inverter is very easy to construct, reliable, and even powerful enough to light up a 15W florescent tube (if you cool your transistor well). The only hard-to-find piece of this baby is the so-called yellow inverter transformer. It's a miniature high frequency transformer that has a 25mm x 20mm x 5mm ferrite core, 30 turns of primary, 15 turns of feedback, and 250 turns of secondary all concentric, wound on plastic frame than wrapped with a 'yellow' adhesive tape. If you can't find it in your local electronic shops then search for old portable rechargeble florescent lanterns since they have at least one yellow inverter. Of course you can wind a handmade transformer which would do the same but it is a very difficult task when you don't have an original to inspire and it will still need an appropriate ferrite core. __
Fluorescent Lamp Night Light Needs Only 1 Watt - If you are tired of replacing small night light lamps, try this circuit. The line powered circuit uses a long life cold cathode fluorescent lamp. A simple charge pump technique runs the lamp without any transformer . . . Hobby Circuit designed by Dave Johnson P.E.-March, 1999
Fluorescent Light - How to build a 4-Watts Fluorescent light using a disposable camera, powered by one 1.5 Volts battery. __ Designed by Jose Pino
Half Bridge Inverter has Variable Frequency - 10/09/97 EDN-Design Ideas Modern electronic ballasts require added features, such as high-frequency preheat for filaments, nominal lamp-power control, and light-dimming capability. Because the output inverter operates in resonant mode, you can control the power or current of these ballasts simply by varying the switching frequency. To vary the frequency,__ Circuit Design by Thierry Castagnet, SGS-Thomson Microelectronics, Schaumburg, IL
Inverters to power fluorescent lamps from Low voltage DC - This is a collection of non-intelligent (at least for now) inverter circuits for operating fluorescent or other similar devices from low voltage DC power sources. These designsmostly obtained by reverse engineering commercial camping lanterns, power inverters, and the likeare all very basic circuits which use simple oscillators, easy to obtain or construct transformers, and common power semiconductors. __ Designed by © © 1997 Samuel M. Goldwasser
IR21571 Ballast Control IC Design Kit - The IRPLLNR2 is a high efficiency, high power factor, fixed output electronic ballast designed for driving rapid start fluorescent lamp types. The design contains an EMI filter, active power factor correction and a ballast control circuit using the IR21571. This demo board is intended to ease __
IR21592 Dimming Ballast Control IC Design Kit - The IRPLDIM1E is a high efficiency, high power factor, dimming electronic ballast designed for driving rapid start fluorescent lamp types. The design contains an EMI filter, active power factor correction and a ballast control circuit using the IR21592. __
IRPLMB1e: 25W 230VAC Small Size Ballast using IR2520d - The circuit is built around the IR2520D Ballast Control IC. The IR2520D provides adjustable preheat time, adjustable run frequency to set the lamp power, high starting frequency for soft start and to avoid lamp flash, fault protection for open filament condition and failure to strike, low AC line protection and auto-restart after line brownout conditions. line brownout conditions. __
Low-Cost 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__ Circuit Design by Steven C Hageman, Calex Manufacturing Co, Concord, CA
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
Preheat starter for electronic ballast - 10/04/01 EDN-Design Ideas Electronic ballasts for fluorescent lamps use various techniques to turn on the bulbs. The design usually involves a compromise between turn-on voltage and lamp life because the two are inversely related. One way to reach a reasonable compromise is to initially allow__ Circuit Design by Arthur E Edang, Don Bosco Technical College, Mandaluyong City, Phillipines
Switching Regulator Controls CCFT - 02/16/95 EDN-Design Ideas You can control the current in a cold-cathode fluorescent tube(CCFT]and, hence, its brightness with a switching-regulator IC__ Circuit Design by Doug Vargha, Maxim Integrated Products Sunnyvale, CA
Universal Input Linear Fluorescent Ballast using the IR2166 - The IR2166 Demo Board is a high efficiency, high power factor, fixed output electronic ballast designed for driving rapid start fluorescent lamp types. The design contains an EMI filter, active power factor correction and a ballast control circuit using the IR2166. __
Use a CFL ballast to drive LEDs - 04/26/07 EDN-Design Ideas A CFL ballast can drive a string of as many as 64 LEDs__ Circuit Design by Christian Rausch, Unterhaching, Germany |
