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Wow..i basically read all of that and now my eyes hurt -_-;;. Can some one now make a Step by step thing to make and install one of these? And a noob question: With this upgrade i can basically run motars that need more amage..AND higer voltages the 7.2 volts...
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Here's a thread which has info and links that will make H-bridges quite understandable.
H-bridge Info Thread
Here's a thread with a How-to on installing my version of this modification.
H-bridge install How-to
The external H-bridge allows for higher current drawing motors to be applied, if designed right and utilizes powerful FET's. It does not allow for higher voltages. You need a regulator if you want to prevent blowing IC1 and your receiver due to using voltages higher than 8.4V. That's a separate and, in my opinion, non-essential item compared to external FET power. In essence, the external H-bridge more effectively does what the regulator and higher voltage is intended to do....create higher current flow. There's things you can do to motors to help get a gain in the speed department(lower turns on armature), without raising voltage, but you need to have and H-bridge which can support the current induced by having the voltage stay the same and lowering the 'resistance'(turns). You need an H-bridge which utilizes FET's which have low resistance and high power dissipation ratings. The more the H-bridge's FET's are like wire, the better. The best power connection would be to have wire running from cell to motor, and that's it. You can't control the wire, but you can control an H-bridge.