High Brightness Remote Controlled White LED Bulb .


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Description
Presentation. High splendor LED light installation could supplant current industrially accessible white LED lights which are around 300 lumensThe RF control highlight permits client to control different lights all the while. Highlights. High splendor light yield equal to 100W brilliant light( (1700 lm)RF remote control on/offbrightness dimmingCompatible with 120Vac from the outletLow
Transcripts
Slide 1

High Brightness Remote Controlled White LED Bulb Group 27 Tzong-Yu Chan Justin Czarnowski  April 30 th , 2009

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Introduction High brilliance LED light installation could supplant ebb and flow economically accessible white LED lights which are around 300 lumens The RF control include permits client to control numerous lights at the same time

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Features High splendor light yield proportional to 100W radiant light (1700 lm) RF remote control on/off shine diminishing Compatible with 120Vac from the outlet Low power utilization, high unwavering quality

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High Brightness Remote Controlled White LED Bulb Power Supply LED units Receiver Remote Control

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System Overview Hardware: Power Supply, RF Receiver, Dimming Unit, LED Light String, RF Transmitter Software: A/D and serial transmission code for remote PIC Serial gathering and PWM yield code for collector PIC

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System Overview Power Supply Circuit LED Current Driver Heat Dissipater Bridge rectifier AC Power Source Power Converter PIC LED Circuit RF Receiver Wireless Remote RF Transmitter RF Transmitter 9V Battery 5V controller Potentiometer and switch PIC

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Hardware Overview Power Supply Take 120Vac power and change over to stable greatest 33 Vdc and 1 Amp Transfomerless to decrease space and weight Dimmer Unit Change the measure of ebb and flow experiencing the LEDs by shifting the PWM obligation cycle RF Receiver & Transmitter Allow client to control the light remotely

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Power Supply Can supply up to 33Vdc to the LED circuit Transformerless Maximum ebb and flow: 1Amp 120Vac information specifically from the divider outlet

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Tranformerless Power Supply Resistive Transfomerless Power Supply

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Tranformerless Power Supply Capacitive Transfomerless Power Supply

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Tranformerless Power Supply MOSFET Gate Controlled Transfomerless Power Supply Source: Supertex Application Note A H52

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HV9931 Fixed recurrence PWM controller IC intended to control LEDs Input voltage: 0~470V Source: Supertex Application Note A H52

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Power Supply Source: Supertex Application Note A H52

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Power Supply Testing Result

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Wireless Remote Control Objectives: Operate up to 30 feet far from knob Line-of-sight not required On/off and darkening ability Predictable conduct when out of range

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Wireless Remote Control Design: Use RF transmission: Linx LC TX/RX combine Remote PIC catches simple brilliance esteem as a 8-bit advanced esteem utilizing ADC 8-bit esteem transmitted remotely through Linx chips Receiver PIC yields PWM motion with obligation cycle comparing to 8-bit esteem

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Wireless Remote Receiver Side Wireless Remote RF Transmitter RF Transmitter 9V Battery 5V controller RF Receiver PIC Potentiometer and change PIC to LED momentum driver…

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Wireless Remote Schematic Voltage Regulator PIC RF Transmitter

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Wireless Remote Receiver Remote Linx RF recipient Linx RF transmitter PWM yield to LED ebb and flow driver Brightness control potentiometer

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RF transmission Baud rate = 9600 bps => 104us period Data contribution to transmitter (remote) Data yield from beneficiary Data matches - remote operation affirmed! Remote range just around 3 inches…

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RF transmission confirmation 8-bit shine esteem is cushioned with driving and trailing "enchantment bytes" Receiver just changes PWM obligation cycle (brilliance) if enchantment bytes are right Ensures unsurprising knob operation notwithstanding when remote leaves go, loses control, and so on

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PWM flag Receiver PIC changes over the 8-bit information into a PWM obligation cycle rate PWM flag controls LED ebb and flow driver which thusly controls splendor The subsequent shine of the LED globule is relative to the obligation cycle of the PWM flag PIC (collector) PWM flag Serial information (8-bit)

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25% 2% T = 20uS 75% 98% half Duty cycle = 100% (greatest splendor) PWM flag Duty cycle = 0% (totally dim)

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Challenges Originally proposed to utilize MAX611 chip to change over 120 VAC to +5 VDC for controlling Linx chip and PIC on recipient side MAX611 is no longer accessible Workaround: utilize 9V battery on beneficiary for exhibition purposes

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Potential arrangement: BIAS Power BPI 200-05-00 Requires negligible update of collector circuit Would require substantial amount arrange Source: www.biaspower.com

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LEDs Cree XR-E R2 container Brightest monetarily accessible single LED 228 lumens yield at 1000 mA input momentum Forward voltage ≈ 3.7 V Star warm sink for warmth dissemination

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LEDs 100W radiant knob yield: ≈1700 lumens (228 lumens/LED) x (10 LEDs) = 2280 lumens!

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XR-E R2 execution Source: "Drove Flux Spreadsheet." Adam Royall Smith

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Actual Performance LED control supply does not yield as much present as planned Designed to yield 1000mA yet just yields 100mA normal! LEDs generally diminish…

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Actual Performance Actual greatest yield is just 40 lm/LED Total max. yield is just 400 lm Falls shy of design objectives

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Successes and Failures: RF go just a couple inches Very low ebb and flow yield Underperformance of ebb and flow driver circuit brought on low brilliance Brightness control not smooth for yield of high shine LEDs Successes: RF correspondence utilitarian Transformerless LED driver Obtained high splendor and high proficiency LEDs Smooth A/D transformation on remote PIC Receiving PIC translates information and yields suitable PWM flag

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SWOT Analysis Weaknesses Limited remote range Low splendor because of momentum driver circuit High cost Buzzing sound at high brilliance Strengths Low power utilization Transformerless High splendor/high effectiveness LEDs Wireless control Dimming ability Opportunities Potential to supplant glowing globule Could be utilized as a part of difficult to-administration zones because of longer lifetime Threats Not segregated from AC line Undervoltage condition

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Sources http://www.cree.com/items/pdf/XLamp7090XR-E.pdf http://www.biaspower.com/"Drove Flux Spreadsheet." Adam Royall Smith http://filebox.vt.edu/clients/adsmith4/Lights/Emitter%20Flux%20Datacalc.xls http://www.linxtechnologies.com/Products/RF-Modules/LC-Series-Low-Cost-Transmitter-and-Receiver-Modules/www.selectronic.fr/includes_selectronic/pdf/Maxim/MAX_611.pdf Supertex Application Note A H52 www.supertex.com/pdf/app_notes/A H52.pdf Supertex Unity Power Factor LED Lamp Driver Datasheet www.supertex.com/pdf/datasheets/HV9931.pdf "The Nature of Light." http://www.ccri.edu/material science/keefe/light.htm

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