Ping Jeremie


Hey Jeremie, can you tell me what size cap you were using to smooth out the power supply DJ was using to power inMoov with?

Thanks Dude Smile


Hey @Richard R hope your trip back home was good!

It was two 1Farad 2.5V aerogel caps in series placed on the 3.3V line. This makes a 0.5F 5V rated cap.


Thanks man...

P.S. I got beer and pizza when I got home... so it wasn't too bad.... LOL Grin


@Jeremie... Possible really stupid question.... Could I use a larger Cap and place it across the power terminals instead? If so what size would you recommend?


Not a stupid question at all. The reason why you would want to sustain the 3.3V line instead of the input voltage is that it is far easier to find a super capacitor that is rated for 3.3VDC (or slightly above) than it is to have one rated for 5V or higher.

To sustain the input voltage, like you said, a very large cap would be needed. When using servos there is usually many voltage/current spikes on the input side which are hard to filter and sustain while the regulated 3.3V is slightly buffered from it due to it's low voltage input requirements.

I wouldn't recommend using large caps on the input voltage, they will likely be quite expensive for higher rated voltages and there's no guarantee that they can do the job.


I think I get it... (hopefully anyway) The way you did it is more to keep the ezb alive (not browning out) than to supply actual power to the servos.... do I understand correctly?

I have found some on eBay for $10 for 3... 1 Farad 2.5V...