Ben shared this Monochrone brightness adjustment mod on the Adafruit Forums:
The Monochron sits proudly in my son’s bedroom, alas it can be too bright of a night.
We added a light dependent resistor (LDR) poking out the back of the Monochron, and with a little supporting software we have auto-brightness control. The display backlight now smoothly ramps from dimmest to brightest according to the ambient light levels.
Note that we wanted to have the LDR on the back of the unit for aesthetic reasons (knowing that making a hole in the acrylic case with hand tools was likely to turn out a little ugly), but doing that definitely made the re-assembly very difficult. In hindsight, I’d probably have used flying leads from the ldr to the PCB, so as to be able to tuck the LDR over the existing ISP hole….
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Raspberry Pi and CoderDojo Join Forces
Wearables — Gold glow
Electronics — Linear Love
Biohacking — Nike’s Unlimited Stadium Will Put Your Best Foot Forward
No comments yet.
Sorry, the comment form is closed at this time.