recently I watched a few videos on youtube about frontlighting a Gameboy Color and thought, that it's sooo nooby to destroy another console just for modding another one
So I searched for a good mod, that doesn't need to destroy a Gameboy Advance SP. There was nothing available, anyway I didn't found something. Then I decided to make my own mod.
I bought acrylic sheet (1mm thick) and cut it to a size of 50x50mm. I've ordered diffused protection film to spread the light properly. Of course LEDs are needed, I've ordered 50 white 0402 SMD LEDs from China, they were very cheap.
As you can see when you take a look on my layout, I'll use 9 LEDs per line. There is no need to use so many LEDs, but I wanted to make a mod that overshadow every other, even the commercial backlight mods for the old DMG Gameboy
I hope the light spread will be very good. I'll use two lines, 18 LEDs for one frontlight. Of course, the pcb that drives the LEDs can more, than just put out a certain voltage(about 32V) and a certain current (8mA). It's possible to control the brightness with a potentiometer that will be connected to the PIC MCU. That's not everything, the PIC also does measure the battery voltage. A bi-color LED (green/red) that is used instead of the red LED of the Gameboy, is controlled by two PWM outputs of the PIC, so it's possible to show the battery voltage by mixing green and red until the voltage is critical and the LED is flashing red
Tomorrow or in a few days, I'll etch the PCBs and test everything.
LED driver PCB
LED mounting PCB (only two lines needed for one frontlight)
Some of the main components...
the finished driver PCB:
test with the 18 SMD LEDs and normal acrylic sheet(1.5mm thick)
P.S.: Replicas allowed, but NOT for any commercial use.