![]() ![]() But does the motor start spinning or is there a first initial start command? Well, to be short, it just starts. Therefore it's always on High and the final stop command never arrives. I just soldered this "enable"-pin to the ICs power supply. ![]() And everyone else waits for the data to arrive. Now it has the attention of all other devices. If one device wants to send some information to someone else it first pulls Enable on High. That's how it's done: Communication here uses some sort of SPI interface. I thought about a few techniques for that like adding a MOSFET and a small microcontroller or doing all the communication and control by my own self-build controller.īut I ended with the simplest of it all. If I could just interrupt this communication so that this final stop command would never arrive the motor control IC then I would be fine. It uses a serial communication (SPI style) to interface with the control circuit (btw 25MHz of speed). Now my hard disc has a specific chip for motor control. And after a while - 30 seconds to be specific - it just stops the whole system to prevent damage. Therefore the electronic isn't able to successful finish the self testing. Some diagnosis first: I removed the hard disc heads. After 30 seconds the disc just stops spinning. You take an old hard disc, open it, remove some pieces, cut some other pieces, add a piece of sand paper and connect it to a spare computer power supply. The Indiana e-waste program, sets up a system to collect and recycle discarded electronics from Indiana households, small businesses, and K-12 public and charter schools. Okay, probably you have seen this before. In May of 2009, Indiana passed a statewide e-waste recycling law which establishes recycling programs administered by the Indiana Department of Environmental Management (IDEM). ![]()
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