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newaetech / sonata-pcb

Design files and associated documentation for Sonata PCB, part of the Sunburst Project
Apache License 2.0
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0.2 pcb - LCD_BACKLIGHT pin doesn't go anywhere #9

Closed colinoflynn closed 4 months ago

colinoflynn commented 5 months ago

As reported by @GregAC - LCD_BACKLIGHT isn't routed to the FPGA (but does have a single resistor on it so didn't get an ERC when checking).

Easiest is just for the LCD on, by shorting between these pins: image

The relevant schematic section: image

You can also run a bodge wire from the side of R133 that connects to the Q2 gate to an FPGA pin. But in practice the LCD shouldn't need backlight dimming, so just turning it ON is fine.

GregAC commented 5 months ago

PXL_20240109_150148601 MP

I just used a big blob of solder to bridge the connections, looks to be working well

PXL_20240109_212340053

colinoflynn commented 5 months ago

Issue is fixed on 0.3 PCB (now on order) & will be tested once board is built. Issue will be closed once fix is confirmed.