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index - Daniel Bruns

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weekly assignments

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week 13 | 2016/04/27 - 2016/05/04 | output devices

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Let there be light!

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To fulfill my assignment for this week, I decided to program a 3 channel PWM for my input devices PCB - which was originally planned to do these to assignments. This PCB is also one part for my final project - so, this work was helpful to finish my final project.

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Download my KiCad project

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The startup code and timer configuration was the same like my old one for the fabpic, but to configurate the PWM I used the Datasheet and read the PWM configuration part.

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As LED I used a very nice, small and bright 1.6x1.26mm RGB LED from Kingbright. All 3 colors are driven through a MOSFET and a resistor from 5V.

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To check if the PWM works correctly, I connected my PicoScope to 2 of my 3 PWM channels. This looks quite nice and works...

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As you can see in the upper GIF, my code and the LEDs work :) - Now I only have to redraw the outline to fit this PCB onto my skaterdolly bogie (and add a connector to communicate to the mainboard).

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Here, I'll show you the main functions. The PCB contains a simple, which drives a RGB LED through 3 MOSFETs by PWM. The design is a very rough prototype, which even was a development for my final project, so the PCB is not that beautiful.

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