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Ok here is a screenshot from my Altium schematic - I've put where I connected the probe and where I've put the capacitor. The actual ledstrips are not shown in the picture but they are 12V and powered from a lab power supply on a seperate ground line. The connection between the two grounds is...
I'm working on a LED Strip controller project and I use the PCA9685 as PWM generator and now for test purposes I use a standard Arduino board as microcontroller. However on an oscilloscope I notice there are voltage spikes on the VDD pin of around 200mV each time the level of a PWM output...
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