Tilt sensor/switch for an RC rideable vehicle
March 31, 2012
The Project: I am building a 1/4 scale radio controlled Ford F150 pickup. The body style was chosen for me when I was given a free 1/4 scale fiberglass body. The drive-power was originally going to be a small 2-stroke engine, but I was also given a free Pride Mobility Scooter/wheelchair that came without a controller or batteries. Speed and direction control will be in the form of a SyRen 1X50 from Dimension Engineering, which in turn will be controlled from a common RC transmitter and receiver.
Here is my question: I want to be able to do a little all-terain driving with this truck. It won't have good enough suspension for rock crawling and such, but even so, I would like to add some sort of tilt-sense. The truck will be large enough and powerful enough to be ridden on or to pull a trailer that is being ridden on.
A note before we continue..
Yes, I joined this forum to ask this question.
Yes, I will very likely stick around this forum after this question is answered.
Yes, I am a beginner to 99% of this.
Yes, I am aware that my project, being radio controlled, isn't exactly a "robot" as these pages tend to define robots, however the equipment and techniques used are similar, so I am asking for help here.
Yes, I did do some searching, but, all that I found seemed irrelevant.
I'm not entirely sure what I want the tilt sensor to CAUSE, either slowing down the truck or stopping it or reversing it or shutting it down completely, but I want something very simple. I am more-than-willing to make my own sensors of the ball-in-tube style, but am worried about the ball bouncing around and causing false readings.
I understand that a potentiometer can easily be added to the SyRen to set the max speed. Could a tilt sensor add a pre-determined voltage or resistance in place of the pot idea to simply put the truck in "half speed" if it tips too far? If so, could a different voltage or resistance be assigned to each sensor so that more tip = slower speed or right/left tip - 1/3 speed and front/rear tip = 1/2 speed? All this should be doable without logic, just using the sensors to switch more voltage or resistance into the max-speed input on the SyRen..
I'd like to know what you all think, good or bad, about all this..
Mike, from DieCastoms.