Qwiic Alphanumeric Display: How to get more brightness than setBrightness(15)?

Hi everyone!

I’m working on a clock project and want to make a wooden look of my device. The idea is to hide the display behind the wooden veneer. Please see an example here - https://a.co/d/eE8ThQV

I got my Qwiic Alphanumeric Display and it works perfectly. Thanks a lot to SparkFun for the great product and documentation.

The only issue I have - is the display brightness when I use it under a veneer. It looks dull. So my question - is it possible to increase the brightness somehow?

I’ve already tried to connect it to a 5v power source, but it didn’t help.

As far as I know, the display’s brightness is determined by the current flowing through its segments. By adjusting the current, I can control the brightness. So is it possible in this case?

Will be grateful for your help!

Not in the current PCB configuration; setting the brightness to 15 is setting the duty cycle to 100%

In theory you could try altering the circuit https://cdn.sparkfun.com/assets/c/7/2/8 … isplay.pdf to run off 5v directly, being sure to adjust/use the i2c voltage @ 3.3v

Could you please tell me how to do that? Because I have no experience in this area

TS-Russell:
Not in the current PCB configuration; setting the brightness to 15 is setting the duty cycle to 100%

In theory you could try altering the circuit https://cdn.sparkfun.com/assets/c/7/2/8 … isplay.pdf to run off 5v directly, being sure to adjust/use the i2c voltage @ 3.3v

100% duty cycle would be full brightness. More voltage would also increase brightness but the display is already running at 5 volts and you’re almost at the maximum allowed voltage.

The only thing you can do would be use a different color display that appears brighter and/or make your veneer thinner. Some careful sanding followed by a light coat of polyurethane finish might be enough to get the brightness you’re after. You will need to do some experiments to see if that works.