openflexure_nano_motor_controller

A very basic Arduino Nano based unipolar motor controller.

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7/9 lines (8 parts)

8/9 lines (9 parts)

References	Qty	Description	Manufacturer	MPN	Manufacturer	MPN	Manufacturer	MPN	Manufacturer	MPN	Digikey	Mouser	RS	Newark	Farnell
C3	1	22pF ceramic capacitor through hole	KEMET	C315C220J2G5TA							399-4162-ND	80C315C220J2G	5381219	13K6167	1457651
C1	1	100µF capacitor 6mm	Vishay	MAL202136101E3	Panasonic	EEU-FM1E101					4032PHCT-ND	594222202136101	3245177	04M9015	1165467
R3	1	Resistor 1k 0.25W	Yageo	MFR-25FBF52-1K	TE Connectivity	CFR200J1K0					1.00KXBK-ND	603MFR25FBF521K	1251137	95W5777	2329571
D1	1	DIODE 1N4004	ON Semiconductor	1N4004	Diotec	1N4004	NTE Electronics	1N4004	Diodes Inc.	1N4004-T	1N4004FSCT-ND	6211N4004	7384721	12T2303	1843708
A1	1	Arduino Nano
MOTOR1, MOTOR2, MOTOR3, AUX	1	0.1" header	Harwin	M20-9993645							952-2272-ND	855M209993645	5473150	56K0278	1022263
D2	1	LED 5mm										751-1118-ND	78TLHK5100	8187580	33C1301

... 2 more lines

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This repository has moved!

Please see https://gitlab.com/bath_open_instrumentation_group/sangaboard

OpenFlexure Motor Controller (Sangaboard v0.2)

This aims to be a super-simple motor controller, based on an Arduino Nano and a couple of Darlington pair ICs. It controls cheap 28BYJ-48 steppers, as used on the OpenFlexure microscope and stage. It owes quite a bit to Fergus Riche's motor board, the hardware developed by OpenScope and the Arduino-based motor controller used by a number of summer students working with Richard Bowman in Cambridge, particularly James Sharkey. It is currently the motor board used by the OpenFlexure Microscope.

The repository contains three sets of files; the Arduino firmware in the arduino_code folder, a Python module in the openflexure_stage folder, and the PCB design in the pcb_design folder.

Documentation

You can now see documentation at Read the Docs.

Getting started

The first step is to make and populate the PCB. You can get in touch with WaterScope to order one if they have stock, or alternatively have them made via Kit Space (link to this project).

Next you will need to download the Arduino sketch and upload it to the Arduino Nano. You'll need some libraries, see the arduino_code folder's readme for that.

Lastly, you can control the stage using the openflexure_stage Python module. This can be installed via pip, using pip install openflexure_stage. NB the master branch and the pip released version are currently not in sync, we're working to fix this. If you want interactive control, you might want to check out the OpenFlexure Microscope software, which will run the stage together with the Raspberry Pi camera module.

Credits

Firmware/Python code by Richard Bowman, University of Bath, PCB design & production by Sanga Valerian, STICLab. Development of this board and software was funded by the EPSRC (EP/P029426/1), the Royal Commission for the Exhibition of 1851, and the University of Bath.

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Assembly Guide