WR Home      Topic Home      Chapter:  1  2  3  4  5  6  7  8  9  10  11  12  13 
<Previous Next>

Chapter 13

Page 13

Soldering RGB LEDs



(Please click on an image to enlarge)
  1. A separate resistance should be used for Red, Ggeen and the Blue LED.
    RGB LED test setup

  2. Mount the LED PCB on the Propeller PCB, such that the first LED consides with center of rotation.
    Mount LED PCB on Propeller PCB

  3. Connect all Red-Cathodes together, connect all green-cathodes together, connect all-blue cathodes together.
    Connect similar colored cathodes together

  4. Using a convex lense (magnifying glass) verify that there are no short-circuits
    Magnifying Glass

  5. For this experimental propeller 18 LEDs were soldered but only 15 of them were connected, 3 remained extra
    Three LEDs are extra

  6. Extra LEDs
    Check for sort-circuits

  7. Three common cathods are formed. One cathode for each of R, G, and B
    Common Cathodes

  8. As a short-cut anodes of each LED were sorted and a single resistance was attached to each anode group. So there were 15 anode groups and 15 resistances were connected. In order to produce all 7-color-shades properly anode of each R,G,B must be connected to a seperate resistance. The other end of the 3-resistances can be joined together. In total there should be 45-resistances (15 x 3).
    Soldering

  9. Connect 15 SMD resistances ( 470 Ω each)
    Solder resistances

  10. Wash with ISP-propanol to clean the Propeller PCB
    Clean the circuit

  11. Each LED can be tested without using the Arduino board
    Test without Arduino

  12. Each LED can be tested without using the Arduino board
    Test without Arduino

  13. Using the Arduino board test the LEDs
    Test with Arduino



WR Home      Topic Home      Chapter:  1  2  3  4  5  6  7  8  9  10  11  12  13 
<Previous Next>