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Color Changing LED Lamp

Page history last edited by Luis Troncoso 9 years, 7 months ago

 

LED FLOOD LIGHT SPECS

  • 10 W power
  • 120 degree beaming angle
  • 900 LM brightness
  • 50,000 hour life(For LED)
  • Light Decay < 5%
  • Protection rating IP65
  • Includes color map remote with settings for strobe, flash, fade, smooth, brightness control 

 

The following is a detailed voltage map of the Color LED lamps available in the Lab. This table was used to find the proper DAC chip used to control the colors remotely. The location of the color coding in the table corresponds with color position on the remote. R(Red), O(orange), Y(Yellow), G(Green), Lb(Light Blue), T(Teal). B(Blue), Pu(Purple), P(Pink), W(white). Combinations of these letters refer to the mixed colors. 

 

VOLTAGE MAPPING:

The LED lamp is backwards polarized. To directly inject voltage into the LED and produce assorted colors, connect the positive lead of the power supply directly to the mount of the LED array that has the (+) symbol. Connect the negative lead to the dismounted wires before the RGB resistors. The power supply has two channels which can be used to apply multiple voltages. Using a bread board and external resistors can give you more than just two voltages to get an even broader arrange of colors. This same process can be used to measure the voltages at any location. Connect the negative lead to the location of interest and leave the positive lead connected to the + on the led using an alligator clip or a hook. 

 

After Resistor(Before LED):

 

 

 

AFTER RESISTOR (Before LED)                                  
Color Resistor Max Voltage Min Voltage   Color Resistor Max Voltage Min Voltage   Color Resistor Max Voltage Min Voltage   Color Resistor Max Voltage Min Voltage
                                     
R GREEN 0 0   G GREEN 9.1 4.4   B GREEN 6.2 4   W GREEN 8.1 4.4
  RED 6.9 1.5     RED 3.7 1     RED 2.4 0.7     RED 6.4 1
  BLUE 0 0     BLUE 0.5 0.6     BLUE 10 5.2     BLUE 8.8 5.2
                                     
RO GREEN 5.1 3.7   GLb GREEN 8.9 4.4   Bpu GREEN 4 6.2          
  RED 7 1.3     RED 3.8 1     RED 3.3 1          
  BLUE 0 0     BLUE 6.2 4.6     BLUE 10.1 5.3          
                                     
O GREEN 6.5 3.9   Lb GREEN 8.7 4.4   Pu GREEN 6.2 4          
  RED 6.8 1.4     RED 3.8 1     RED 4.5 1          
  BLUE 0 0     BLUE 7.5 4.8     BLUE 9.9 5.2          
                                     
OY GREEN 7.6 4.2   LbT GREEN 8.6 4.4   PuP GREEN 6.2 4          
  RED 6.7 1.3     RED 3.8 0.8     RED 5.6 1.2          
  BLUE 0.2 0     BLUE 7.8 5     BLUE 9.7 5.3          
                                     
Y GREEN 7.6 4.2   T GREEN 8.5 4.4   P GREEN 6.1 4          
  RED 6.5 1.2     RED 3.9 0.9     RED 6.7 1.3          
  BLUE 0.2 0     BLUE 9.3 5.3     BLUE 9.5 5.3          

 

 

Before Resistor:


 

BEFORE RESISTOR                                  
Color Resistor Max Voltage Min Voltage   Color Resistor Max Voltage Min Voltage   Color Resistor Max Voltage Min Voltage   Color Resistor Max Voltage Min Voltage
                                     
R GREEN 0 0   G GREEN 12.5 4.8   B GREEN 6.2 4   W GREEN 9.6 4.8
  RED 12.3 2.3     RED 3.7 1     RED 2.3 0.7     RED 9.5 1.8
  BLUE 0 0     BLUE 0.5 0     BLUE 12.4 5.5     BLUE 9.5 5.5
                                     
RO GREEN 6 3.8   GLb GREEN 11.8 4.9   Bpu GREEN 6.2 4          
  RED 12.8 2     RED 3.8 1     RED 4.7 1          
  BLUE 0 0     BLUE 6.6 4.6     BLUE 12.7 5.5          
                                     
O GREEN 8 4.2   Lb GREEN 11.3 4.9   Pu GREEN 8.2 4          
  RED 11.8 2     RED 3.8 0.8     RED 7 1.4          
  BLUE 0 0     BLUE 8.3 4.9     BLUE 12.1 5.6          
                                     
OY GREEN 9.4 4.5   LbT GREEN 10.9 4.9   PuP GREEN 6.2 4          
  RED 11 2     RED 3.8 0.8     RED 9.2 1.7          
  BLUE 0.2 0     BLUE 9.6 5.2     BLUE 11.6 5.6          
                                     
Y GREEN 10.4 4.9   T GREEN 10.6 4.8   P GREEN 6.1 4          
  RED 10.4 1.9     RED 3.8 0.8     RED 11 2          
  BLUE 0.2 0     BLUE 10.6 5.5     BLUE 11.1 5.6          

 

Transistor Left (Blue)                                  
Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage
R Gate 3.0 mv 1.0mv   G Gate 3.2 mv 1.0 mv   B Gate 5.3 0.7   W Gate 5.3 0.7
  Source 3.0 mv .3 mv     Source 3.0 mv .3 mv     Source 3.1 mv .4 mv     Source 9.0 mv 1.0 mv
  Drain 5.8 5.8     Drain 5.7 5.7     Drain 13.8 mv 14.0 mv     Drain 20.0 mv 5.1
                                     
RO Gate 3.5 mv 1.0 mv   GLb Gate 1.3 0.2   Bpu Gate 5.5 0.7          
  Source 3.5 mv  .4 mv     Source 3.8 mv .5 mv     Source 3.8 mv .5 mv          
  Drain 5.8 5.8     Drain 4.3 5.3     Drain 14.1 mv 5.0          
                                     
O Gate 4.3 mv  1.0 mv   Lb Gate 2.6 0.3   Pu Gate 5.3 0.7          
  Source 4.5 mv .5 mv     Source 4.6 mv .5 mv     Source 4.6 mv .6 mv          
  Drain 5.6 5.6     Drain 1.4 5.2     Drain 14.9 mv 5.0          
                                     
OY Gate 5.0 mv 1.2 mv   LbT Gate 4.0 0.5   PuP Gate 5.3 0.7          
  Source 5.2 mv .6 mv     Source 5.4 mv .7 mv     Source 5.3mv .7 mv          
  Drain 5.6 5.6     Drain 1.4 5.2     Drain 15.4 mv 5.0          
                                     
Y Gate 5.6 mv 1.2 mv   T Gate 5.3 0.7   P Gate 5.3 0.7          
  Source 6.1 mv .7 mv     Source 6.2 mv .7 mv     Source 6.0 mv .7 mv          
  Drain 5.8 5.9     Drain 16.5 mv 5.0     Drain 16.0 mv 5.0          
                                     
Transistor Middle (Red)                                  
Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage
R Gate 5.3 0.7   G Gate 3.2 mv 3.9 mv   B Gate 2.8 mv .9 mv   W Gate 4.3 mv 0.7
  Source 3.6 mv .4 mv     Source 3.3 mv .4 mv     Source 2.9 mv .3 mv     Source 9.6 mv 1.2 mv
  Drain 14.1 mv 7.1     Drain 7.6 8.1     Drain 7.9 7.9     Drain 20.2 mv 7.1
                                     
RO Gate 5.3 0.7   GLb Gate 3.7 mv 1.0 mv   Bpu Gate 1.3 0.2          
  Source 4.3 mv .5 mv     Source 4.0 mv .4 mv     Source 3.7 mv .5 mv          
  Drain 15.0 mv 7.1     Drain 7.6 8.1     Drain 6.0 7.8          
                                     
O Gate 5.3 0.7   Lb Gate 4.3 mv 1.1 mv   Pu Gate 2.6 0.3          
  Source 5.2 mv .6 mv     Source 4.7 mv .5 mv     Source 4.6 mv .6 mv          
  Drain 15.8 mv 7.1     Drain 7.6 8.1     Drain 4.0 7.6          
                                     
OY Gate 5.3 0.7   LbT Gate 4.8 mv 1.1 mv   PuP Gate 4.0 0.5          
  Source 6.0mv .7 mv     Source 5.4 mv .6 mv     Source 5.5 mv .7 mv          
  Drain 17.0 mv 7.1     Drain 7.6 8.1     Drain 2.0 7.4          
                                     
Y Gate 5.3 0.7   T Gate 5.4 mv 1.2 mv   P Gate 5.3 0.7          
  Source 6.9 mv .8 mv     Source 6.2 mv .7 mv     Source 6.3 mv .8 mv          
  Drain 17.8 mv 7.1     Drain 7.6 8.1     Drain 16.9 mv 7.1          
                                     
Transistor Right (Green)                                  
Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage   Color Pin Max Voltage Min Voltage
R Gate 3.0 mv .9 mv   G Gate 5.3 0.7   B Gate 2.9 mv .9 mv   W Gate 5.3 0.7
  Source 3.4 mv .4 mv     Source 3.2 mv .4 mv     Source 2.8 mv .3 mv     Source 9.5 mv 1.1 mv
  Drain 6.5 6.6     Drain 15.6 mv 5.8     Drain 5.9 6.5     Drain 21.4 mv 5.8
                                     
RO Gate 1.3 0.2   GLb Gate 5.3 0.7   Bpu Gate 3.5 mv .9 mv          
  Source 4.2 mv .5 mv     Source 3.9 mv .5 mv     Source 3.7 mv .4 mv          
  Drain 4.9 6.4     Drain 16.3 mv 5.8     Drain 5.9 6.5          
                                     
O Gate 2.6 0.3   Lb Gate 5.3 0.7   Pu Gate 4.1 mv .9 mv          
  Source 5.0 mv .6 mv     Source 4.6 mv .5 mv     Source 4.5 mv .5 mv          
  Drain 3.3 6.2     Drain 17.1 mv 5.8     Drain 5.9 6.5          
                                     
OY Gate 4 0.5   LbT Gate 5.3 0.7   PuP Gate 4.7 mv 1.1 mv          
  Source 5.8 mv .7 mv     Source 5.3 mv .6 mv     Source 5.4 mv .7 mv          
  Drain 1.7 6     Drain 17.8 mv 5.8     Drain 5.9 6.5          
                                     
Y Gate 5.3 0.7   T Gate 5.3 0.7   P Gate 5.2 mv 1.1 mv          
  Source 6.6 mv .8 mv     Source 6.0 mv .7 mv     Source 6.3 mv .8 mv          
  Drain 18.3 mv 5.8     Drain 18.6 mv 5.8     Drain 5.9 6.5          

 

Each lamp comes with 120V circuit that is used to accommodate for any use. It can be replaced with a 12V wall charger. This method was used to test the circuitry and fill in the table above. 

 

COMPONENTS IN THE CIRCUIT:

  • 3 resistors: Red(R), Green(G), Blue(B)
  • 2 capacitors
  • Positive lead (Pink wire), ground (white wire)
  • IR sensor (black wire with black sensor at the end)
  • 2 Digital Analog Converters(DAC), "24c02c 877541347"

 

 

The LED array has three columns of three LEDs. Each column correlates to its corresponding colored wires and RGB resistors. The first column of LEDs are all red; second are all green; third all blue. When being used to produce any color, each column of 3 LEDs is turned on simultaneously depending on which combination of RGB is needed. When disassembling these lamps, be sure not to dismount the LED array because the system runs hot and it will burn out if the correct amount of thermal paste, white in color and underneath the LED array, is not present. To remove the LED array, unscrew the two screws holding it down but have thermal paste present to reapply if turning the LED on.

These LED lamps are controller via IR (Infrared). It has three cables controlling the IR dongle: positive 5v(red), ground (black), data signal (White). To analyze the signal given to the IR dongle from the remote, splice a wire into the white cable. Keep the white cable connected to the system so it still receives a signal but can also send the information to the Logic Analyzer. After doing this, start the Logic Analyzer software, Saleae, and then plug in the LED to an outlet. Start the sampling on the software and press keys methodically to see the information relay on the software. This information can be reproduced by an arduino using an appropriate sketch. 

 

 

Infrared sensors are controlled by a signal given by the remote control. These codes come in the form of serial codes that are later decoded by the internal circuit to do whatever the remote demands. To acquire these codes, an arduino, arduino sketch, and the IR sensor from the LED were used in combination with the steps from http://www.instructables.com/id/The-Easiest-Way-to-Use-Any-IR-Remote-with-Ardiuno/?ALLSTEPS. These codes will later be used to an array of LED flood lamps. 

 

IR Serial Codes Decimal                          
All End With 4294967295                          
                             
Bright Up 16187647   Bright Down 16220287   Off 16203967   On 16236607        
                             
R 16195807   G 16228447   B 16212127   W 16244767        
                             
RO 16191727   GLb 16224367   Bpu 16208047   Flash 16240687        
                             
O 16199887   Lb 16232527   Pu 16216207   Strobe 16248847        
                             
OY 16189687   LbT 16222327   PuP 16206007   Fade 16238647        
                             
Y 16197847   T 16230487   P 16214167   Smooth 16246807        
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

The infrared approach was not successful and is not recommended. We chose to bypass this system and use three MCP4902 DACs to control each RGB resistor individually. Refer to the MCP4902 DAC page for connections to arduino and relevant information. 

 

CONNECTIONS TO ARDUINO, MCP4902 DAC, TRANSISTORS;

 

 

 

 

Need more than 5.5V from DAC so need to figure out transistor connections, power supply issue. 

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