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My Crib
Two years after removing my thermostat, I finally got around to installing the replacement, a distributed data aquisition system. I'll add more stuff here as I bring more sensors online.
Recent News
Stepper Motor Controller Code Update
Just a quick update, I’ve added support for limit switches in the firmware. Enable them by specifying the associated pin, and if it’s active high or active low. The preferred method is active low otherwise you need to add your own pulldown resistor if it’s active high. // specify min-max sense pins or 0 [...]
Stepper Motor Controller Update
I’ve recently posted about my new stepper motor controller. Well, I was unhappy with the implementation used in the RepRap project, and what started as a code cleanup has turned into a near full rewrite. I’m fairly happy with the code now and finished my preliminary testing. I based my original version of the re-written [...]
Arduino-Based Stepper Motor Controller
Decided to drop my PCB and use some prebuilt modules from pololu. Doing the math, this turned out to be the cheapest option (3x$13 vs. $50 for the PCB plus another $30-$50 to populate). The pololu modules use Allegro’s A4983 intgrated h-bridge drivers rated at up to 2A – which amazes me given the size [...]
Recent Cellphone Pics
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