I have a platform that's attached to a rolling chassis by linear actuators. As the chaiis moves the wheels be be on uneven terrain but i need the deck to run up and down to maintain a fixed high.
Right now i have a rotating laser on a tripod sending signals to a laser signal receiver to give me absolute level now. The receiver drives the actuator up and down to keep itself at it's specified height level.
The laser set is big money and i would like to think of a way to do this with the arduino if possible. If i do this i can also customize some features and perhaps drive a display to show me relevant information. Can anyone think of a good way to find an absolute height?
*note - ground height will change so i cannot just sense the height from the earth
I am not against keeping the tripod rotating laser and attempting to just buy the receiver side as that end is the majority of the money. Think this may be do-able? I am not sure what type of receiver is would use for this.... would those rotators use IR? Just looking for some general ideas...... and i am sure i left out some major detail... so feel free to ask and i will try to paint as good of a picture as i can.
In addition to the current. Building a humanoid robot means whatever servo's are at the base of its "appendages" need to have enough turning force to be able to support the weight of the appendiage which includes the weight of the servo mounted to the other joint.
ex: the shoulder need to be able to support the whole arm, including the weight of the elbow and wrist servos. With "the cheapest I could find" servos this may not be the case.
Your car battery outputs between 11 and 12.5 volts when the car is not running.
In order for the alternator to charge the battery and run the electronics in the car it outputs a slightly higher voltage. So any time your engine is running, any lines that have 12V from the battery will likely read about 14 volts. Quick way to tell is with a voltmeter. Red lead to one of the bulb wires (when the bulb is on) and black lead to somewhere that has continuity to the frame of the vehicle.
Most automotive devices have a range from ~10 volts to ~16 volts for this reason.
I have not had any experience with the pro mini but i ran a Mega1280 to control some led's in my truck for a long while. I ended up using an old car power adapter that output 9Vdc and just used it as an input supply for the Mega to make sure i didn't have a heat issue on the board. Worked great until i scavenged the board for other project :-)
i don't have any specific information to your question. I do want to throw in that when your car is running the voltage is likely ~14.5 VDC. Just wanted to make sure you were compensating for that in your design.