If you are working with powerful motors or other applications that require high current you might be interested in measuring the bunch of Amps running through your wires… sometimes a simple resistor is just not enough due to high currents and so on, so a good idea is to use this hall-effect sensor: ACS754
I am using this sensor to measure the current used by one of the thrusters in our underwater robot. This thrusters run at 8.000 rpm thanks to a pretty powerful brushless motor, but we are drawing up to 35A out of the batteries so just a resistor is not enough to measure such high current.
Here is a picture of one of these homemade thrusters:
So as you can guess “Water and 35A” don’t really work out together, that’s why I made this simple “SkyAmp” board (The name still needs to be approved by Iearobotis.com).
As you can see the connector named “SKYPIC” is pin-compatible with the Skypic boards where Pin 2 is the analog sensor output, Pin 9 is VCC and Pin 10 is GND. Just plug this board to Port A on the Skypic and your electronics are ready to go.
Here you can download the eagle files.
Also, if you want the microcontroller’s code based on the 18F2525 you can download the CCS project from here. SkyAmp.h and SkyAmp.c can be easily translated to other IDEs.
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