Quote:
Originally Posted by Zabco
Actually I have played around with Arduinos and Raspberry Pis since the Arduino Duemilanove board came out. I just don't think that there is room inside the lift for even a nano sized board. The nano has a 30mA limit per pin so even with just 2 LEDs on a circuit you might need to also incorporate a switching transistor besides the resistors. I used a RasPi Zero as the basis for my portable message sign that I built a couple of years ago. I recently acquired some arduino nano clones that have packet radio capability that I am going to try to integrate into another project that I'll post up if it works out. I would really love to see some one do one of these piggyback conversions and be able to incorporate lighting, just not going to be me at this time.
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Apologies, one of these days I'll learn to check for previous experience before I go frothing off at the mouth. Might be a little Arduino happy :|
Wrt the current limit, though, I just drive one LED per pin, and haven't had any trouble at 20mA. Cuts down on component count, but as you say, room is still at a premium. I know Adafruit has their Trinket line that are tiny, or maybe you could just use a bare '328 chip, but then you need a voltage regulator and at least a connection to program it ... ugh.
Anyway, I'll stop going off topic, and just say wow. I'm particularly interested in the limit switches as I wanna do something similar for a telescoping column for another project and I have a box of those very switches awaiting the time and work.
-- A