• Don't buy crap power supplies!

    Jeremias • 03/21/2017 at 19:13 • 0 comments

    I changed my 12V Supply to a higher quality one, now everything works as expected.

    I think the problem was, in sleep mode the circuit draws so little current, that the supply can't hold a steady voltage.


    The only small problem left is, at low brightness you can see the individual brightness levels.
    In the future I may add 10/12? bit software-PWM to get smoother dimming of the LEDs.

  • Control box

    Jeremias • 02/14/2017 at 15:25 • 0 comments

    I haven't fixed the power supply issue yet, but I finished the control box.

    The box features a momentary button, a green LED (with resistor) and a toggle switch, which switches the 230V for the 12V supply.

    Next week, when I am back in my apartment, I hopefully will figure out what causes the power supply issues.

  • Power supply issue?

    Jeremias • 02/07/2017 at 18:56 • 0 comments

    Everything works as expected if I power the circuit via the ISP programmer (Arduino UNO) or my bench power supply.

    But if I use the 3,3V regulator from the PIR-module, the circuit behaves strange. I also tried a L78L33AC regulator powered from the 12V rail, resulting in the same strange behaviour.

    My circuit consumes less than 10mA, which both regulators should be capable of.

  • Code, Schematic

    Jeremias • 02/07/2017 at 18:10 • 0 comments

    I uploaded the code to Github. The code is almost finished, but still needs some tweaks.

    I also added the schematic to the files section.