arduino for school

Hello I would like to know what arduino I would need to run 2 small engine and sensor I have a small budjet thank you for your answer .

another little question with an arduino is it possible to adjust the speed of live rotation from his phone

thank you

We need a lot more information - a little motor you mount on a breadboard or a house sized motor ?

hammy:
We need a lot more information - a little motor you mount on a breadboard or a house sized motor ?

Doesn't really matter. The Arduino can send data to a motor controller to control the motor. It can't directly power and control any motor. With a suitable motor controller, the size of the motor doesn't matter. Nor do the voltage or current requirements.

another little question with an arduino is it possible to adjust the speed of live rotation from his phone

The Arduino doesn't have a phone, so it can't use his phone to do anything.

The Arduino is not a phone, so you can't call it do anything.

The Arduino COULD wear a bluetooth low energy shield, which could be controlled by a phone, with suitable software installed on the phone and a suitable sketch on the Arduino.

i know the arduino is not a phone but it can emit a bluetooth signal ?

roctor84:
i know the arduino is not a phone but it can emit a bluetooth signal ?

With an appropriate Bluetooth adapter, yes.

AWOL:
With an appropriate Bluetooth adapter, yes.

Of course, emitting a signal has NOTHING to do with being able to receive the "signal" emitted by the phone...

Well,, you'd want for your Bluetooth device to correctly handshake with the phone, so I guess, yes, it would want to emit something.