Building first RC car robot

[RCbotbuilder]

I am now building my first RC car robot. this is pretty cool because this is the next step up from both of my old mindstorm robot kits.

[RCbotbuilder]

i am going to use a servo controller to controll it. then you may ask HOW IN HECK ARE YOU GONNA DO THAT! first, from a laptop a wireless signal will go to the controller. then when the conroller trys to make a servo move i will use that power coming out to trigger a transistor. that transistor connected to staight to the battery will make the biger moters move




"i shall fail but i will fail with style!"

[airman00]

I am now building my first RC car robot. this is pretty cool because this is the next step up from both of my old mindstorm robot kits.

you'll need a special H bridge that converts servo pulse to motor speed and direction

another method that I've seen in some cars is to have the servos turn switches and pots to control the larger motors

[RCbotbuilder]

What is a h bridge and may one build one? and please go easy on electronics because im only 12

[airman00]

What is a h bridge and may one build one? and please go easy on electronics because im only 12

google it 

you'll get plenty of results . Then after you got more specific questions post em here!

[RCbotbuilder]

do i have to use one?
and also i need help with all those wires for steering
can you help me with that? im testing with my power supply right now actually!

[airman00]

do i have to use one?
and also i need help with all those wires for steering
can you help me with that? im testing with my power supply right now actually!

do you want speed control on your robot or just fully forward or fully backward?

[RCbotbuilder]

i dont want speed control

[airman00]

i dont want speed control

just use comparators with the servo pulse

http://www.societyofrobots.com/member_tutorials/node/83

[Gertlex]

Or build a mechanical switching device that uses a servo.  And another servo to a rheostat to control speed (though burning out rheostats is pretty easy, too)

I've done this same general project using bluetooth:
http://www.societyofrobots.com/robotforum/index.php?topic=1672
http://www-personal.umich.edu/%7Eerelson/BluetoothCar.html

Two pics of the motor polarity switch: http://www-personal.umich.edu/%7Eerelson/BluetoothCar.html#31

[RCbotbuilder]

ive just torn apart the controller and for stering it has 6 electrical contacts with a slider that conects two contacts as the bar is pushed

example: