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Old LCD board modification to allow fw 3.9.0 brightness control ?
 
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Old LCD board modification to allow fw 3.9.0 brightness control ?  

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fjkraan
 fjkraan
(@fjkraan)
Eminent Member
RE: Old LCD board modification to allow fw 3.9.0 brightness control ?

Here my superfluous implementation with a different perspective. Thanks for the information and images.The one transistor two-resistor variable backlight mod

Greetings,

Fred Jan

This post was modified 4 years ago by fjkraan
Posted : 19/10/2020 3:29 pm
ANTALIFE and vintagepc liked
mcfada
 mcfada
(@mcfada)
Active Member
RE: Old LCD board modification to allow fw 3.9.0 brightness control ?

Awesome upgrade for machines that don't include this, my MK3S is from Feb 2019, right before this started being included. Thanks for sharing the detailed instructions. For reference of anyone else trying this, I used a 10k Ohm pull-up resistor, 2 x 220 Ohm resistors in parallel (for 110 Ohm) on the PWR_LED, and a BC547B NPN Transistor. Works like a charm!

Posted : 24/01/2022 12:11 am
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