New lower price for Axon II ($78) and Axon Mote ($58).
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[...] a line follower with minor changes as to make it useful in a restaurant or similar (it would basically carry around plates from the kitchen to the tables, and come back).[...]Originally thinking about Visible Light LED (with LDR as sensors, connected to an analog pin), today I wondered what advantages would we get by using IR LEDs. Any input?
How is the "programming" made? I've seen some that offer the possibility to reverse the rotation, which is great for us (we had H-Bridges planned, but decided to make sure the robot did the minimum first), but we are clueless on how is that taken care of, or how complicated it is.
Can I assume as BEC output the overall output going to the Motor, and use them for calculations, such as RPMS, etc? Most of them seem to be 5V and when there is only indication of Amperage, I assume the Voltage is equal to the battery?
About the pwm output: cant we do it digitally? correct me if my line of thought is flawed, but we only require a constant speed, so would it be possible for us to set the voltage to the point where the final RPS, considering the wheel diameter, would equal our desired speed, and the acceleration would occur naturally... right
I couldnt understand this part: "You don't have to hook up the BEC part of the ESC if you don't want to." I thought the BEC part was the only one going to the motors. So i guess theres another part that connects to them. I cant leave the BEC "floating"?
Sorry I really didn't explain this correctly. An ESC works by you supplying it a voltage source, directly from a battery pack, and a control signal, which is usually provided by either a microcontroller or RC receiver. It's the same thing as providing a signal to a servo with a a pulse command, no difference. The ESC will then use that to control the motor at a particular speed. You can't, as far as I know, just provide it voltage and have it run. So you need to be able to find some way provide the ESC that signal. Easiest way is to use a microcontroller, hook up the control signal to it and treat it like a servo as far as programming it.
The BEC doesn't control the motors. It's a separate output of the ESC that provides power to a receiver and some servos. If you don't need to provide power to them then its not needed. Sometimes you can buy an ESC without a BEC in it. If you have one on the ESC and don't need it then you can leave it floating.
I do need to provide power to the motors, so I should use a BEC, correct? (how could i not need to provide them power?)im failing to understand how it works, sorry: The motor will be connected through the three wires at the same "terminal" (i dont know if this is the correct term) of the ESC, which will provide power, and control him. Ive seen a guy set up a motor once, and i believe he did it this way.Was that a BEC? apparently the motor can connect to the ESC by two sets of wires, one for control (absolutely necessary) and the optional BEC, so what could have I seen?
~Thanks! The picture with the description made everything clearer, great.I´ve been seacrhing for batteries, and this one, which seemed interesting (Turnigy 2200mAh 2S 25C Lipo Pack ) in the picture from hobbyking, shows an exit which resembles a BEC, including a yellowish (signal??) cable. Is it really a bec? whats the point of a signal wire in a battery? and can i ignore it, and plug the two major black and red (you can only see a part of them, but i guess they end in something connectable) on the ESC?Thanks
With a bit of research i believe that plug is the charging plug, am i correct? if so, anything i should be wary of when choosing the charger?