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Otakar Priboj  Electronics pages


luxeon III
 Electronics projects information's. This page under constant construction - development.
Pages are dedicated to electronics - special LED's
White led projects including 5mm, Luxeon and Golden Dragon Led's.

Simple drivers for LED's ( DC/DC Converters for Powering LED's).
  • Single transistor Led driver for one to three 5mm Led's.
  • Two transistor driver for one to three 5mm Led's.
  • Three transistor driver with current control for six 5mm Led's.
NEW!!! DC/DC Converters for Powering Luxeon LED's Torch.
  • Driver from 1 cell 1.2 V or 1.5 V.
  • Torch Step-up drivers from 1-1.5V for Luxeon 1W  /  300mA, with Zetex IC's ZXSC300E5CT or ZXSC310CT.
  • Torch Step-up drivers from 2-3.8V for Luxeon 1W and 3W  / 800mA, with Zetex IC's ZXSC300E5CT or ZXSC310CT.
  • Drivers for Luxeon 1W and 3W with Zetex IC's ZXSC300E5CT or ZXSC310CT
NEW!!! DC/DC Converters for Powering Luxeon and Golden Dragon LED's from 12V, 24V, 48V. Ideal for Solar powered house.
  • Universal driver for Powering Luxeon and Golden Dragon LED's from 12V, 24V, 48V. Ideal for Solar powered house.
Miscellaneous projects:
  • Solar battery charger controller Sem1 and Sem2 with power module can switch up to 180A to 12 or 24 V battery.
  • Laboratory Power Supply   "Cool Power a&o 505" Single Output 0 - 50V, 0 - 5A.
Projects : Published in Silicon Chip, Electronic Australia and Soft Technology - now ReNEW.
  • Solar Regulator 12V / 24V 20A.  ( Projects Published in Silicon Chip )
  • Fluorescent tube driver from 12V, 24V. versatile fluorescent inverter 7W -16W. ( Projects Published in Silicon Chip and Soft Technology - now ReNEW)
Projects which I like to develop in future - Proposed project for future development.



Simple drivers for LED's ( DC/DC Converters for Powering LED's)


White LED torch driver for 1 & 3 x 5 mm Led's.
tree transistor led torch
Two Single transistor drivers for 1 Led
Left inductor for single transistor LED driver operate from 1.2 - 1.5V
Operates from 1 Alkaline / NiMH  AA / AAA cells.
Can supply 25mA to 1 or 3 LED's.
>?????Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.
Operating voltage range from 0.5V - 1.5V

Simple circuit use only 5 components. Components from single camera can be used transformer - trigger transformer (after rewind), switching transistor. Components can be reclaimed from Computer Motherboards, Video cards, Hard disk drives - tantalum smd capacitors, diodes and ferrite RF rods.

Transistor Q1 can be substituted with transistors reclaimed from Computer hard disk drives this all apply for capacitors.
Note: Can be used components from single camera, transformer after rewind, switching transistor.

Files in Acrobat  pdf format
Link to Schematic  single_t.pdf
Link to PCB driver board
single_pcb.pdf
inductor for single transistor driver

Single transistor driver
Single transistor driver 1 or 3 Led driver

Left inductor for single transistor LED driver from 1.2 1.5V
Operates from 1 Alkaline / NiMH  AA / AAA cells.
Can supply 25mA or more to string of 3 LED's. Current is adjusted with R before potting in epoxy.


?????Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.


Operating voltage range from 0.5V - 1.5V
Looks like mess, tangled cooper wires.

Note: Can be used components from single camera, transformer after rewind, switching transistor. Simple circuit use only 5 components.

Link to Schematic single_t.pdf
Link to PCB driver board
single_t_pcb.pdf

White LED torch  10 and 12 x 5 mm Led's.
coil2
Two transistor driver

Left inductor for two transistor LED driver from 1.2 1.5V
Operates from 2 Alkaline / NiMH  AA / AAA cells.
Can supply 25mA or more to string of 3 LED's. Current is adjusted with R before potting in epoxy.


?????Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.

Typical output 300mA from AA cells. (tested with 1W Luxeon and 1.5V Vin )
Converter can by made as 9.0mm diameter size if desired.
Operating voltage range from 2V - 3V
Hand assembled circuit is tuned and tested

Looks like mess, tangled cooper wires.

Link to Schematic two_t.pdf
Link to PCB driver board
two_t_pcb.pdf



White LED torch with 1W LUXEON . good for bush waking.

Circuit employ SMD components. Size of the board diameter 14.5 mm. This can drive Luxeon up to 400 mA from 2 NiMH batteries. I used Zetex drivers ZXSC300E5CT  or ZXSC310CT
with possibilities to use shut down pin for dimming control. With 2 AA 1600 mA NiMH batteries run time for torch is 2 hours. Test with 2 D 4000 mA confirm rum time of 8 hours.

Text link to Schematic

Image of Zetex driver PCB
Image of PCB-Pil driver board.
Image of assembled torch.
Image of 3 W Luxeon driver board.

Image of 3 W Luxeon torch.



NEW!!! DC/DC Converters for Powering Luxeon LED's

green 1W torch
green 1W torch_1
green 1W torch_2
Sexiest LED and driver in the galaxy!!! (Milky way)
This was checkout for facts and approved by ET. Please if you don't agree don't look.

New prototype of driver for 1WLuxeon and 3 W Luxeon.
Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.
Each driver is tuned for best performance.

Mimi<300 driver 300mA from 1.5V
Image of 1 W Luxeon Mimi<300 driver board

Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.
Operates from 1 Alkaline / NiMH AA / AAA cells.
Typical output 300mA from AA cells. (tested with 1W Luxeon and 1.5V Vin )
Converter can by made as 9.0mm diameter size if desired.
Operating voltage range from 0.5V - 1.7V
Hand assembled circuit is tuned and tested

???? Each one will get a 10 minute burn in test so everything gets up to temperature.



Link to Schematic mimi300_t.pdf
Link to PCB driver board
mimi300_t_pcb.pdf



Image of 1 W Luxeon
Mimi<300 driver board.

Mimi<800 driver 800mA from 3.0V






Future development

Please visit in future.

Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.
Operates from 2 Alkaline / NiMH D / AA / AAA cells. (minimum 2300mA NiMh AA or D size sells recommended).
Typical output 800mA from AA Alkaline cells (tested with 3W Luxeon and 3.0V Vin).
Converter can by made as 9.0mm diameter size if desired.
Operating voltage range from 1.5V - 3.4V.
Hand assembled circuit is tuned and tested.

???? Each one will get a 10 minute burn in test so everything gets up to temperature.


Input voltage maximum 3.2V !!!, can be design and tuned to accept V_in maximum 4.2V.


Link to Schematic mimi800_t.pdf
Link to PCB driver board
mimi800_t_pcb.pdf

Image of 3 W Luxeon
Mimi<800 driver board.

Mimi>1000 driver 1000mA from 6.0V






Future development

Please visit in future.

Measures 13.9 mm (??? inch) diameter x 6.7 mm (??? inch) height.

Operates from 4 Alkaline / NiMH D / AA cells. (2300mA NiMh AA or D size sells recommended)
Typical output 1000mA from D / AA cells. (tested with 3W Luxeon and 4.80V Vin )
Operating voltage range from 4.0V - 6.0V
Hand assembled circuit is tuned and tested

???? Each one will get a 10 minute burn in test so everything gets up to temperature.



Link to Schematic mimi1000_t.pdf
Link to PCB driver board
mimi1000_t_pcb.pdf




Image of 3 W Luxeon
Mimi>1000 driver board.

Maxi> 70012 driver SMD
Future development
Please visit in future.

Will drive 3x 3W luxeon in series.

Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.
Operates from 12V.
Typical output 700mA from 12V Battery or power supply. (tested with 3x 3W Luxeon and 12.0V Vin)

Converter can by made as 9.0mm diameter size if desired.
Operating voltage range from 11V - 14.4V

Used for in home lighting - solar powered house.
Car, Caravan or Truck.


Maxi> 70012 driver SMD
Future development
Please visit in future.

Will drive 3x 3W luxeon in series.

Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.
Operates from 24V.
Typical output 700mA from 24V Battery or power supply. (tested with 3x 3W Luxeon and 24.0V Vin)

Converter can by made as 9.0mm diameter size if desired.
Operating voltage range from 20V - 28.8V

Used for in home lighting - solar powered house.
Car, Caravan or Truck.




NEW!!! DC/DC Converters for Powering Luxeon and Golden Dragon LED's from 12V, 24V, 48V.
Ideal for
Solar powered house.


Sepic 12/24 driver standard
sepic12/24 driver

Prototype PC board





Sepic converter driver  was chosen because it have ability to have low or high input voltage and same time drive one or six 3 W led's. This driver can be used in 12V or 24 V house lighting system and in emergencies can be used in car 12V battery.  24 V solar system and in same time in car.

Universal Luxeon driver will drive 1 - 6  3W Luxeon III, (Luxeon K2) or Golden Dragon
in series.
  • Will drive 1 - 12  3 W Led's
  • Operates from 12V / 24V.
  • Operating voltage range from 10V - 30V Maximum.
  • Typical output 700mA - 1000mA
  • Output current adjustable by user.
  • Pulse width modulation dimming. Dimming possible by adding trimpot. 
  • Operate from 10V to 30V Battery  DC power supply or AC.
  • For AC ad rectifier bridge and output filter capacitor 2200uF / 63V.
  • Efficiency >85%.
  • Measures 146 mm (??? inch) x 67 mm (??? inch) height.
  • Ideal Luxeon  driver for Solar powered house, Car, Caravan or Truck.
Note: Tested with 6 Luxeon III and can be used from 1 to 12 Led's.
Input voltage to have
best efficiency  for
6 Luxeon III12V *BZX79-C24
9 Luxeon III12V - 24VBZX79-C36
12 Luxeon III24VBZX55-C51
* if more LED's used bigger heatsink required

Note: Tested with 6 Luxeon III and can be used from 1 to 12 Led's.
Driver for 1 - 6 Led's from 12V and 6 - 12 Led's from 24V  3W Luxeon III, (Luxeon K2) or Golden Dragon in series.
I am using this driver in me 24 V solar house set-up.

Link to Schematic sepic12_24.pdf
Link to PCB driver board
sepic12_24pcb.pdf

Sepic 48 driver standard
Future development
Please visit in future.
Universal Luxeon driver will drive 3 - 6  3W Luxeon III (Luxeon K2) in series.
  • Operates from 24V / 48 V.
  • Operating voltage range from 20V - 60V Maximum.
  • Typical output 700mA - 1000mA and 1500mA 
  • Output current adjustable by user.
  • Pulse width modulation dimming. Dimming possible by adding trimpot. 
  • Operate from 20V to 60V Battery  DC power supply or AC .
  • For AC ad rectifier bridge and output filter capacitor 2200uF.
  • Efficiency >85%
  • Measures 106 mm (??? inch) x 67 mm (??? inch) height.
  • Ideal Luxeon or Golden Dragon LED driver for Solar powered house.
Note:

Link to Schematic sepic_48.pdf
Link to PCB driver board
sepic_48pcb.pdf

Maxi> 70012 driver SMD
Future development
Please visit in future.
Will drive 3x 3W luxeon in series.
Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.
Operates from 12V.
Typical output 700mA - 1000mA from 12V Battery or power supply. (tested with 3x 3W Luxeon and 12.0V Vin)
Converter can by made as 9.0mm diameter size if desired.
Operating voltage range from 11V - 14.4V




Used for in home lighting - solar powered house.
Car, Caravan or Truck

Maxi> 70024 driver SMD
Future development
Please visit in future.
Will drive 3x 3W luxeon in series.
Measures 10.6 mm (??? inch) diameter x 6.7 mm (??? inch) height.
Operates from 24V.
Typical output 700mA - 1000mA from 24V Battery or power supply. (tested with 3x 3W Luxeon and 24.0V Vin)

AA Alkaline cells (tested with 3W Luxeon and 3.0V Vin)
Converter can by made as 9.0mm diameter size if desired.


Operating voltage range from 20V - 28.8V
Used for in home lighting - solar powered house.
Car, Caravan or Truck.



Solar battery charger controller Sem1 and Sem2 with power module can switch 120 A to 12 or 24 V battery.
One switching module can switch 60 A, and use 6 Mosfets 60 A each on resistance 0.02R.
Voltage drop its minimal. Battery voltage can be changed from 12 to 24 V just with removing link.

Solar Battery charging controller  SEM 1 - PSM30 & PSM60








Future development
Please visit in future.



Image of SolarElectronics Module SEM1
SEM1 is Solar Electronics Module, which control power module PSM30 or PSM60 and switch the power source on and off as required. This is a very efficient method and can be used with alternative charging methods. You can configure solar regulator which 1x PSM30 for switching of 30A and you can connect 1 x PSM30 to 5 x PSM30. In other words you can expand of current handling of solar regulator in future and save money.
1x PSM60 for switching of 60A and you can connect 1 x PSM60 to 5 x PSM60. In other words you can expand of current handling of solar regulator in future and save money.

  • Field selectable 12 or 24 Voltage. It can be supplied different voltages 36V, 48V.
  • Fluent battery charged voltage level from 13.4 to 17.0 volts. ( 26.8 to 34.0 volts for 24V )
  • Battery Temperature Compensation.(Optional)
  • This Solar Electronics Module, lets you charge a lead-acid battery from a solar panel, at current up to 150A /100A. ( 5x 30A / 5 x 20A depend on version of system )
  • You can configure solar regulator which 1x PSM30 for switching of 30A ( voltage drop is only 0.15V ) or 20A ( voltage drop is only 0.1V ) and in future you can expand your system to 60A / 40A , 90A / 60A,. 120A / 80A or 150A / 100A. ( add on PSM30 for additional 30A / 20A capacity )
  • You can configure solar regulator which 1x PSM60 for switching of 60A ( voltage drop is only 0.15V ) or 20A ( voltage drop is only 0.1V ) and in future you can expand your system to 120A / 180A , 90A / 60A,. 120A / 80A or 150A / 100A. ( add on PSM60 for additional 60A capacity )
  • 2 LED's status indicators Yellow - CHARGING and Green - FULL / FLOAT
  • 1 LED status indicator for load disconnect ( 10.8V on 12V / 21.6V on 24V ) Red - ON .
  • By using MOS circuitry and low current LED's, the quiescent current, and power consumption of the regulator is very low.
  • It will work with 12V, 24V, 36V, 48V. lead-acid, deep cycle, gel cells, lead-acid car, truck or boat batteries. 
Right : Solar Electronics Module SEM1 assembled form.
Solar Battery charging controller SEM2 - PSM30 & PSM60
Image of SolarElectronics Module SEM2 SEM2 is Solar Electronics Module, which control power module PSM30 and switch the power source on and off as required. This is a very efficient method and can be used with alternative charging methods. You can configure solar regulator which 1x PSM30 for switching of 30A and you can connect 1 x PSM30 to 5 x PSM30. In adder words you can expand of current handling of solar regulator in future and save money.

  • Field selectable 12 or 24 Voltage. It can be supplied different voltages 36V, 48V.
  • Fluent battery charged voltage level from 13.4 to 17.0 volts. ( 26.8 to 34.0 volts for 24V )
  • Battery Temperature Compensation.
  • This Solar Electronics Module, lets you charge a lead-acid battery from a solar panel, at current up to 150A /100A. ( 5x 30A / 5 x 20A depend on version of system )
  • You can configure solar regulator which 1x PSM30 for switching of 30A ( voltage drop is only 0.15V ) or 20A ( voltage drop is only 0.1V ) and in future you can expand your system to 60A / 40A , 90A / 60A,. 120A / 80A or 150A / 100A. ( add on PSM30 for additional 30A / 20A capacity )
  • 2 LED's status indicators Yellow - CHARGING and Green - FULL / FLOAT
  • 3 LED's status indicators for load disconnect which control power module PLM25 and switch the power source off as battery reach levels 3 ; 2 ; 1 . Red - LED3 ON .( 10.8V on 12V / 21.6V on 24V )
  • Red - LED2 ON . ( 11.0V on 12V / 22.0V on 24V Red - LED1 ON . ( 11.2V on 12V / 22.4V on 24V )
  • 1 LED status indicator for diversion of current from solar array ( via power diversion module or additional PSM30 ) to another battery or water pump, energy is not wasted. To prevent fast switching on and off introduced is time 2 minutes.
  • LED status indicator for load disconnect ( 10.8V on 12V / 21.6V on 24V ) Red - ON .
  • By using MOS circuitry and low current LED's, the quiescent current, and power consumption of the regulator is very low.
  • It will work with 12V, 24V, 36V, 48V lead-acid, deep cycle, gel cells, lead-acid car, truck or boat batteries.
Right : Solar Electronics Module SEM2 assembled form.



"Cool Power" a&o 505 Laboratory Power Supply
cool power a&o 505

"Cool Power" a&o 505 Laboratory Power Supply
"Cool Power" from O.P. SOLAR , a&o 505 Single Output 0 - 50V, 0 - 5A.
A new range of rugged, high specification power supply that have been designed for both the industrial and education markets. A versatile variable laboratory / bench power supply, capable of operation in both constant current and constant voltage mode with automatic cross over ; constant current or constant voltage is indicated by 2 LED's. Dual 3 digit Led display allow current and voltage to be accurately pre-set with the output switch in position "off" for voltage pre-set , and in position "set I (load on)" for current pre-set and the output to be precisely monitored with the output switch set to "load on". Voltage and current can be set by means of fine 10 turn potentiometer   controls. Voltage to a precision of 100 mV , and current to a precision of 10 mA. Current limit may pre-set prior to a load being connected. LED's show whether the supply is operating in constant voltage or constant current mode. Power supply can operate in to short circuit indefinitely. By applying SCR pre-regulator voltage drop on regulating transistors remain approximately 7V.

Futures:
  • High quality, high power linear regulation.
  • Low noise and excellent transient performance.
  • Tree digit display of voltage and current.
  • 0.1% accuracy, 0.1V Volt and 0.01A Amps resolution.
  • Simultaneous metering of voltage and current.
  • Voltage and current setting can be viewed prior to being applied.
  • True constant voltage or constant current.
  • Constant voltage and constant current indication (LED).
  • (Constant voltage or constant current mode with automatic crossover).
  • Power supply can operate in to short circuit indefinitely.
"Cool Power" a&o 505 LABORATORY POWER SUPPLY
"Cool Power" from O.P. SOLAR , a&o 505 Single Output 0 - 50V, 0 - 5A

Specification :
  • Mains input 220/240V ac +/- 10 % 50/60 Hz
  • Output 0 to 50V / 5A
  • Load regulation ( output change for zero to full load change ) < 0.1mV eff
  • Constant voltage approx. < 1mV eff
  • Constant current approx. < 0.01%
  • Internal resistance
  • Constant voltage approx. 10 mOhm
  • Constant current approx. 20KOhm
  • Ripple and noise < 5mV pk-pk
Power supply can operate in to short circuit indefinitely.
Maximum internal dissipation in all conditions. (On regulating transistors) < 40W




Solar switching regulator  
solar regulator op004

Image of Solar Regulator OP004
Solar Regulator OP004 assembled form. OP004/12V/20A

Published in Silicon Chip January 1994   "Switching regulator for solar panels."

In the simplest solar panel plus battery setup, all you need is a diode to isolate the panel from the battery . This prevents the battery from discharging via the solar panel when it is not illuminated by the Sun.This is OK for a temporary setup but unless the solar panel is only trickle charging the battery , you will eventually run up against the problem of over-charging. Over-charging a lead-acid battery causes gassing, which can significantly reduce its life.To avoid over-charging the battery you need a regulator circuit so that the solar panel can charge the battery at its maximum current output until, reaches full charge. At that point, the regulator disconnects the panels from the battery and no further charging take place. The regulator can be build in two versions (10-amp or 20-amp) & can be used to charge a 12V or 24V battery bank.

OP004/12V/10A  &  OP004/12V/20A
OP004/24V/10A  &  OP004/24V/20A

Solar Regulator OP004 is a switching regulator, switches the power source on and off as required. This is a very efficient method and can be used with alternative charging methods.

This Regulator lets you charge a lead-acid battery from a solar panel, at current up to 20A ( depending on version of Regulator ). By using MOS circuitry and low current LED's, the quiescent current, and power consumption of the regulator is very low. It will work with 12V, 24V lead-acid deep cycle, gel-cells, lead-acid car, truck or boat batteries. ( It can be set also for 36V )

Solar switching regulator is available in short form kit version. PCB OP008, on-board components , for price look PRICE LIST. We can also provide build up service for our kits.

Link to Schematic - op004_1.pdf
and op004_2.pdf
Link to PCB driver board - op004_1pcb.pdf
Full 
photostat copy of the article can be obtained from  www.siliconchip.com.au



Inverter for fluorescent lights
fluoro inverters1
Original  inverter for fluorescent lights


fluoro inverters2
Inverter for fluorescent lights with different transformer
Published in Silicon Chip February 1991    "Three inverters for fluorescent light"

Fluorescent tube are one of the most efficient forms of electric lighting but because of their high voltage requirements their are rarely used unless 240V AC mains power is available. The particular attraction of fluorescent lights in these applications is that they are so highly energy efficient - much better than incandescent lamps. Yet are many applications where the high efficiency of fluorescent tubes could be highly useful. These range from portable emergency lighting to lighting for recreational vehicles, caravans, boats, and on homes and farms. In fact, if a pinpoint light source or a concentrated beam is not required, then fluorescent lighting should be the first choice, because of its efficiency. This inverter provide the necessary high AC voltage to drive a fluorescent tube from a 12V DC (24V/48V) supply and at a high efficiency.
  • Sine wave - NO interference's.
  • One fluorescent inverter for the range of fluorescent tubes from 5W to 2D 21W.
  • Change tube has no effect on the fluorescent inverter.
  • High frequency switching for low power consumption.
  • Standard 12V / 24V DC ( optional 48V ) supply.
  • Power consumption on 12V - 7W /0.48A ; 9W /0.63A ; 11W /0.78A ; 2D 16W /0.88A ; 2D 21W /0.95A 
This view shows the versatile fluorescent inverter 7W -16W.

Link to Schematic - fluoro_1.pdf
Link to PCB driver board
- fluoro_1pcb.pdf
Full 
photostat copy of the article can be obtained from  www.siliconchip.com.au



Electronics projects published in Australian magazines.
Projects : Published in Silicon Chip, Electronic Australia and Soft Technology - now ReNEW.
The Silicon Chip January 1991
Build a bigger laser.
Helium tube 5mW laser for laser light show.

The Silicon Chip February 1991
Three inverters for fluorescent light.
Three inverters 1 universal from 7W tube to 2D 16W tube, 18W  tube and 36W tube.
Electronics Australia August 1992
Visible laser diode pointer.
3 mW Visible laser diode pointer.
Soft Technology number 46 ( now ReNEW )
Build yours own 12V fluoro inverter.
Universal 12 and 24V fluoro inverter.
The Silicon Chip January 1994
Switching regulator for solar panels.
Switching regulator for solar panels.
12 / 24V version and 10A/20A (OP004)
Full  photostat copy of all articles (excluding  ReNEW ) can be obtained from  www.siliconchip.com.au



White LED torch with 3W LUXEON . Proposed project for future development.
White led's Luxeon III, (Luxeon K2) or Golden Dragon.
  • One option I'm considering is using Luxeon III and use 2 Zetex drivers either ZXSC300E5CT or ZXSC310CT. Only difference ZXSC310CTD shut pin can be used for dimming control. In this configuration I can use 1 driver for 1/2 power and 2 driver for full power. I tested  ZXSC300E5CT and ZXSC310CT   in this configuration and circuit can drive Luxeon 3W from 3V delivering approximately 800mA.
  • Second option I'm considering is using Luxeon III and use step-down converter or microcontroller.  Microchip have driver on they site. Buck Configuration High Power LED Driver AN874. The circuit is based on a buck topology switching power supply using the on-chip comparator peripheral within the PIC12F675 microcontroller. This microcontroller system can use only one switch and have 15 steps dimming control.
  • Microcontroller based Sepic (Single-Ended Primary Inductance Converter) converter for driving Luxeon  and Golden Dragon LED Led's from 10 to 32V,  1 or 2 strings of six led's. Dimmer control,  light intensity sensor for constant light output, can be used with natural lighting and IR sensor with timer no movement switch off..
  • Linear technology  manufacture of special IC's for driving Led's. Examples are: LT 1618,  LTC 3215 - 700mA Low Noise High Current LED Charge Pump,  LTC 3490 - Single Cell 350mA LED Driver.
  • Sepic  (Single-Ended Primary Inductance Converter) dc/dc converter for driving Luxeon  and Golden Dragon LED Led's from 10 to 32V and if demand for 48V. Sepic was chosen for ability to work from wide range of input voltages.
Solar power - Charger controllers.
  • PWM solar battery charger controller for 12V and 24V battery bank and if demand for 48V.
  • PWM solar battery PTM charger controller.



Proposed LED's driver project for future development. As you find out some of the project are already on this page.
< 5mm LED's Drivers for Lighting. Used for white , red, yellow. > Simple but reasonable efficient driver for 5mm Led's.
  • Single transistor driver for 1 and 3 LED's.
  • Two transistors driver for 1 LED.
  • Two transistors driver for 6 LED's.
  • Four transistors driver with current limit for 6 LED's.
< Luxeon 1W and 3W Drivers for Torch. > More powerful drivers for Luxeon III, (Luxeon K2) or Golden Dragon.
  • Zetex driver for 1W Led's. Step-up from 2-3V. I_out 350mA and 400mA to 500mA.
  • Zetex driver for 3W Led's. Step-up from 2-3.8V. /Bootstrap/ I_out 500mA to 700mA.
  • Sepic Zetex driver for 1W Led's. From 1.5-7V. /Bootstrap/ I_out > 300mA.
  • Sepic Zetex driver for 3W Led's. From 1.5-7V. /Bootstrap/ I_out > 300mA.
< Luxeon 3W Drivers for Solar Home Lighting. > Universal driver will drive 3 - 6  3W Luxeon III, (Luxeon K2) or Golden Dragon in series one or two strings.
  • Luxeon drivers from 12V; 24V; 48V. For 1W, 3W.  / 1 - 6 Led's one string and two strings for 2x 6 Led's. 
    • Drivers based on TL494 or SG3524.
    • Drivers based on Microchip  microcontroller.
    • Drivers based on  ONsemi.com  PWM IC's  MC34063A & MCV33163. 
  • 12 - 24V Sepic design (universal V_in)  V_in 10V - 30V.  Driver for 1 - 6 and from 24V 6 - 12  3W Luxeon III, (Luxeon K2) or Golden Dragon in series.
    • Drivers based on TL494.
  • 24 - 48V Sepic / Push-pull design (universal V_in) V_in 20 - 60V. Universal Luxeon driver will drive 1 - 6  3W Luxeon III, (Luxeon K2) or Golden Dragon in series.
    • Drivers based on TL494 and SG3524.
  • 12 - 24V Push-pull design (universal V_in) (see Note #)
  • 24 - 48V Sepic / Push-pull design (universal V_in) (see Note #)
  • Dimmer control for driver or dimmer control included in driver.
  • Zetex based 12/ 24V driver /  and dimmer control.
# After experience with sepic driver I will reconsider development of this design.

12V  3x 3W Luxeon
12V  3 - 6x 3W Luxeon


Contact : Otakar Priboj    otakarpriboj@otakarpriboj.com.au

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Last updated June 26, 2006