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Dec 25, 2014, 11:19 PM
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Tachometer upgrade






The 1st tachometer sensed 1 wheel revolution. It barely had enough deflection to flip a logic level & took a very long time to get a reading.



A new tachometer would attach to the motor shaft.


The shaft was roughened.


A magnet was epoxied on.


It took a lot of grinding to get it to fit under the shell. This provided enormous logic deflection, but any stray rock or complete suspension deflection would destroy it. Fortunately, RPM feedback can be turned off at runtime. The long term goal is still a brushless motor, which doesn't need a tachometer.


There was barely any clearance from the wheel.


This provided 10Hz RPM data points, giving a much more stable speed. Unfortunately, the weather has become too cold for the human to get very far.


Finally satisfied there was no other place to put the headlights & it was never going to be driven without the heavy shell to protect from water intrusion, the headlights were finally glued.




Windshields were put in to protect from water. It was amazing how well the plastic parts fit together, a sign that it was a Japanese kit.
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