Date: 5.11.16
Location: Logan High School
Time: 4:15-7:15 PM
Goal: Connect controller and work on output signals and wire in motor controls.
Students: Oscar, Grant (Max came in to help also) Additionally, James, Issac, Owen and John worked on this during DE class.
We are expanding our work nights to days also so we probably put in about 4 hours working on various aspects of the AV during the school day.
Our main priority is to get the Pixhawk controller output signal programmed in a way that the PWM signal is useful to us. Right now it defaults to about a 10% power on immediately upon arming the controller. That we do not want as the motor would start turning immediately. We have to find a way to change the output of the signal to match a traditional throttle output. On the plus side, we were able to hook up an O-Scope and see that we are getting about a 3V PWM signal when the throttle is full speed. We had problems earlier arming the Pixhawk as many of the defaults had to be changed and the documentation for converting the Pixhawk (designed to be used on drone aircraft) to a rover is very in depth. Our goal in the next couple of days is to work on getting that signal tuned in.
Wiring is going well and we only have to solder two small circuits for the the output logic with the optoisolator circuits. Our first real motor test went well. It was good to see a motor actually turn after all the wiring we did.
We will plan another work night next week.
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| Our relay box getting wired. |
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| Testing our Pixhawk controller. |
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| Enclosing our circuitry to protect it. |
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| Car frame has been painted and is ready for components. |
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| Getting a value on our PWM signal using an O-Scope. |
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| Soldering a connection on the relay box. |
Motor Test #1 using a small motor just for testing purposes.
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