Heli’s motor take up very high current. So, a motor driver that supports less than 4 or 5 Amps was out of the question. We did not have FET’s to make a H-Bridge, so we hacked upon the radio box of the heli and connected a cable to the FET bridge already there. We also tested PWM control on these connections and it worked!

Cable hacked to provide PWM into the radio box to directly control speed of motors

I also soldered a quick and a compact prototype board that would interface the Arduino Pro with all our sensors. I tried to install the accelerometer and the 2 gyros in the XY and YZ plane, so that, they revolve around a common center (This is not really required).

Circuit - Top

Circuit - Bottom

Circuit - Side

Circuit - Final

 

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