Go Down

Topic: Sensing voltage from the power wires of an RC motor (Read 1 time) previous topic - next topic


Hi.. I'd like to try and rig up an arduino to control the speed of an RC car. I plan to use the cars built-in hardware for the radio communication and then sense the output sent to the motors using the Arduino. The arduino will then use it's own circuity to actually control the motor. (Yes, there's probably a more elegant way to do it  :D.. but I want to try this method)

The problem is in the fact that the output to the RC motor can change polarity to drive the motor in either direction. How will I be able to sense voltages which switch polarity with the arduino?


If the Arduino is controlling the motor in the first place then why you need to sense what you feed it? You should know!

Nick Gammon on multitasking Arduinos:
1) http://gammon.com.au/blink
2) http://gammon.com.au/serial
3) http://gammon.com.au/interrupts


I want to control the car wirelessly.. i.e Using it's remote.
I'm using the cars circuit to receive the radio signals and output then to the arduino.
The arduino will then used PWM to accelerate the motor gradually, instead of accelerating in one quick jerk. To to this, the arduino has to sense when the remote is sending the appropriate signals.



To calculate a value for the power sent to the motor?
...Well, yes. But I need the arduino to sense when the remote sends a signal to the cars' circuit so that it knows when to start the motor. 



the problem is in the fact that the output to the RC motor can change polarity to drive the motor in either direction.

So sense the input.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.


No, to gradually accelerate.

yup, that's what I meant..

Ok, I'll try this out and post back.. any further posts would be useless, otherwise.
Now I need to get my hands on 6 AA batteries.. hehehe

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131