Beginners: please read this post and this post before posting to the forum.
0 Members and 1 Guest are viewing this topic.
Will I be able to control the speed with which the motor goes?Will I be able to fully utilize differential drive so that I can actually MOVE while turning?What happens when I push two or more buttons on remote controller simultaneously?How many channels do I need? How can I be sure that the remote controller does not interfere with the opponents robot and vice-versa?
Will I be able to control the speed with which the motor goes?
Will I be able to fully utilize differential drive so that I can actually MOVE while turning?
What happens when I push two or more buttons on remote controller simultaneously?
How many channels do I need?
How can I be sure that the remote controller does not interfere with the opponents robot and vice-versa?
That encoder/decoder chip looks like a pretty good thing to have lying around - I might see where I can get some of those here in the UK... 8 inputs/outputs plus encoding/decoding on 1 chip !Building your own remote control is a good idea, as you can configure it to whatever you need for the project. However, if you need speed control, you will have to go with buying a remote, and use servos on the robot. This option is more expensive, but will allow you greater control over the robot's speed and direction.For your remote controlled robot, you could build a remote with 8 buttons arranged in whatever configuration you need; one of the chips configured as an encoder; and an RF transmitter module connected to an antenna. Then have an aerial on the robot connected to another one of those chips, configured as a decoder, with four of the outputs connected to 2 H-Bridges, driving the motors.To answer your questions:QuoteWill I be able to control the speed with which the motor goes?Yes, but only if you buy a pre-made controller and use servos (expensive option), or a DC Motor speed controller (even more expensive)QuoteWill I be able to fully utilize differential drive so that I can actually MOVE while turning?If you mean move one wheel faster than the other so the robot sort of goes in an arc shape, then you will have to use speed control, as if you make your own controller, the motors can only spin forward/backward at 1 constant speed.QuoteWhat happens when I push two or more buttons on remote controller simultaneously?If the two buttons are connected to the same H-Bridge and therefore the same motor, "Your circuit explodes into pretty sparks", quoting Admin's H-Bridge tutorial. You can prevent this by buying a remote with joysticks, or making the two opposite buttons on the home-made controller on a 'rocker', so only one button can be pressed at a time.QuoteHow many channels do I need?You will need two for driving, plus one more if you wanted say, a flipper on the front of the robot. Note that on the home-made controller, each channel requires two inputs/outputs, for forward, off and backward.QuoteHow can I be sure that the remote controller does not interfere with the opponents robot and vice-versa?That chip you listed has an 'address' setting. I'm presuming this means that the transmitted data is encoded with that address, so the encoder and decoder have to have the same address for the communication to work correctly. If you connected the four 'address' pins on the chips to a DIP switch, you could configure the address on the day, and change it if necessary.Hope this helps and good luck at the competition ! -HyperNerdPS. I could make a schematic for you if you wanted, showing you how to do the things I have suggested
what do u mean 3rd world country dude...everything u need is available and even more...u havent searched in the right place... loook into www.nex-robotics.com, www.robokits.org....and it may be enev available in ur local market so stop complaining and start searching..
I haven't made one of these yet because I don't have any of the encoder/decoder ICs (can't find a source in UK )If anyone finds a source near UK (France / Germany is acceptable), then please let me know, and I will stock up! I think I figured out a way to solve the problem of pushing two buttons at once and blowing up the h-bridge. Take a peek at my attached image.Basically, the two inputs are connected to an XOR gate, and the output of the XORis connected to the bases of two NPN transistors, which switch on the outputs. This could be applied to the reciever circuit I posted, so if you pressed two buttons at once, the robot would stop, not explode. -HyperNerdPS. Razor, good luck with the searching!