Monthly Archives: March 2014

Pot controls linear position

Further testing with the AccelStepper library. With Acceleration and MaxSpeed. Further testing: half-step mode with the Pololu board.

 

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Filed under DIY, Hacking, ICs, micro-controllers, Motors

Acceleration

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First succesful test

OK, so it doesn’t do a lot. However, it seems the wiring checks out and the board is functional.

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Filed under DIY, Hacking, ICs, micro-controllers, Motors, Teensy

Motor prep

Feeling better this aft, so I prepared two motors: the Matsushita FMD02700B4 from the 5.25″ floppy drive, and an unmarked stepper from an optical drive.

Matsushita stepper motor

Matsushita stepper motor

Solder on flex cable

Solder on flex cable

The latter motor was connected with a ribbon cable, so it required some soldering to connect to a bread board. The Matsushita has decent wired connector that accepts 22AWG quite easily.

Optical stepper motor assembly

Optical stepper motor assembly

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Filed under Hacking, Motors, Soldering

Pololu stepper driver

Soldering is a lot easier when it's not -25°C.

Soldering is a lot easier when it’s not -25°C.

Needed some BNC leads for school, so I tossed one of these in my basket.

Built around the Allegro A4988 micro stepping bipolar driver. Going to try to get this working with the Matsushita motor I harvested from an old 5.25″ floppy.

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2A 15V Lab PSU

image

While the LT3080-based PSU project is still ongoing, I had an immediate need for a workable unit for experiments related to my course work at Algonquin.

The YINHUA unit ($50 delivered via eBay) has so far performed reliably and is accurate enough for my current needs. Recommended.

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Filed under Lab bench