README.md
Raspberry Pi Camera Lamp

Overall concept

The main part of the light are two branches with 12 LEDs each. They are arranged in 2 concentric circles. In the centre of these circles there is a hole (7mm diameter) for camera lens. In the space between this hole and the LEDs there are 4 mounting holes for attaching the camera to the board. Beneath this "circular" part there is a "rectangular" part of the light controller. Taking from left to right, there are two inductors, two Schottky diodes, two LED drivers, two resistors and two capacitors and the data (PWM) connector, the power connector and a trimmer and a solder jumper. There are altogether 6 holes for mounting the whole module (light board + camera) to a holder. The wiring is based on a schematic shown in the datasheet of the AP8801 driver.

Here you can see the <![CDATA[]]>3D model of the board<![CDATA[]]>.

Here is the schematic and board.

Components

(numbers hold for one board)




  
Part
  
Manufacturer
  
Manufacturer No.
  
Farnell/Mouser Ref.
  
Pieces




  
LED
  
OSRAM
  
GW JDSTS2.EM-H4H7-XX33-1
  
<![CDATA[]]>https://bit.ly/2IQPlnt<![CDATA[]]>
  
24


  
LED driver
  
DIODES
  
AP8801
  
<![CDATA[]]>https://bit.ly/2E9jP5u<![CDATA[]]>
  
2


  
Capacitor
  
TAIYO YUDEN
  
HMK325BJ475KN-TE
  
<![CDATA[]]>https://bit.ly/2Oex5dw<![CDATA[]]>
  
2


  
Inductor
  
BOURNS
  
SRN8040TA-101M
  
<![CDATA[]]>https://bit.ly/2NzDQ4y<![CDATA[]]>
  
2


  
Resistor 1R1
  
KOA SPEER
  
RK73H1JTTD1R10F
  
<![CDATA[]]>https://bit.ly/2QF4E5e<![CDATA[]]>
  
2


  
Schottky Rectifier
  
VISHAY
  
SS1H10-E3/61T
  
<![CDATA[]]>https://bit.ly/2ywoOXw<![CDATA[]]>
  
2


  
Trimmer
  
BOURNS
  
TC33X-2-103E
  
<![CDATA[]]>https://bit.ly/2yaW6MC<![CDATA[]]>
  
1




The values of the components were determined based on the LED driver (AP8801) datasheet.

Connectors


POWER-1 - +48V
POWER-2 - GND
CTRL-1 - GND
CTRL-2 - RASPBERRY Pi PWM
CTRL-3 - RASPBERRY Pi PWM


Assembly

As our light board is made of aluminium and the heat dissipates massively, we recommend to solder the LEDs as shown in the following picture:



The board is heated with hot air from beneath and the solder pad gets heated from the soldering iron.