The yampp-7 EL backlighter is finally here.
It consists of a super small EL-driver module and a cool blue backlight foil that suits the Nokia 3310 display perfectly.
The current consumption is about 10-20 mA, depending on how bright you want it to be. The brightness is easily controlled by a resistor on the driver board.
The EL backlight is available in the web-shop as an assembled unit only.
This is due to the size of the HV857 chip and components and the lack of markings on these. It is available together with a blue EL-foil (as shown on the pictures).
|Partslist & Schematic|
Part Value Package ------- -------- --------- R1 1M R0603 R2 560k R0603 C1 3n3 (100V) C0603 C2 100nF C0603 D1 BAV103 SOD80 L1 220uH L1812 IC1 HV857 MSOP8
Then you need to find a spot to place the EL-driver. As you can see on the image to the left, I placed the driver just beside the display connector, and in direct connection to the EL-foil.
Three wires needs to be drawn to the EL-driver from the display cable - VCC (pin 1), GND (pin 6) and BLIGHT (pin 9).
That's all there is to it. Remember to set the correct backlight mode in the menu on the yampp-7.
You can order the assembled board for this project at the yampp Web Shop.