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Author Topic: RC Car with proximity sensor  (Read 3198 times)
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Shannon Member
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sorry, confused R/C with TX/RX
http://www.hobbyking.com/hobbyking/store/__9041__Hobby_King_2_4Ghz_6Ch_Tx_Rx_V2_Mode_1_.html

for full cart this is the (complete, just stole 4 AA batteries from some remote) for < 50$ (~80 with expedition)

http://www.hobbyking.com/hobbyking/store/__20614__1_18_Scale_4WD_RTR_On_Road_Drift_Car_blue_.html
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Hmm - that's fairly inexpensive, but the specs/pics don't really give any indication as to whether/how you could hook an Arduino in between the receiver and the ESC and steering "servo" (it isn't even clear whether that servo is a regular servo or not). It certainly seems completely proportional, but whether it is standard hobby grade or toy...dunno. Might be useful for hacking, though it's size is a bit on the small side, it seems.
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RX system is integrated... so it is a no-go. my bad

you won't find a car that inside it's chassis will fit an arduino.  but you can remove it an with a little bit of fantasy use the chassis support as arduino support

this one is ok (also better engine and battery): http://www.hobbyking.com/hobbyking/store/__13450__1_18_Brushless_4WD_Stadium_Truck_w_18Amp_System.html
spare part ( so you know what you get and how to replace/upgrade)
it is missing TX/RX and lipo, that's about 30$.

80$ all + 30$ expedition = 110$ (using related article but not for charger, you can find it at 5$)

edit:

Length: 250mm
Width: 185mm
Height: 110mm
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RX system is integrated... so it is a no-go. my bad

you won't find a car that inside it's chassis will fit an arduino.  but you can remove it an with a little bit of fantasy use the chassis support as arduino support

this one is ok (also better engine and battery): http://www.hobbyking.com/hobbyking/store/__13450__1_18_Brushless_4WD_Stadium_Truck_w_18Amp_System.html
spare part ( so you know what you get and how to replace/upgrade)
it is missing TX/RX and lipo, that's about 30$.

That's actually not a bad deal for a robot chassis; once you figure in lipo and charger, if you didn't need the radio, you're under or around $100.00 USD. Certainly not as cheap as an el-cheapo toy RC car that you hack, but not bad for something closer to hobby grade.

I bet if you were willing to spend another bill, you could probably get something that could fit the Arduino (ie - larger scale).

Adding the radio gear would kill it, though.
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Hi,

There are basically Three basic approaches as follows -

1) Pure electronics - a budget rc car with additional electronics similar to the comparator circuit which will use infra red light to detect object in front of the car and cut power to the motor.



DuaneB, does this method requires an arduino board? Or the sensor links to the comparator, and the comparator has to be fitted in between the wire that connects the battery and the motor?
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Hi,

If you look at the second circuit 'EXAMPLE CIRCUIT - DARK ACTIVATED ALERTER' in the link I posted, that is almost exactly what you are looking for - the buzzer sounds when it is dark (the motor runs when there is no ir light reflected by nearby object), the buzzer stops when there is light (the motor stops when there is ir light reflected by a nearby object).

I suggest you google IR Object Detection, it used to be a common and very low cost way for hobby robots to sense thier environments, you will need to change the circuit linked above to include an ir detector instead of a generic light detector.

Duane B.
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and therefore, the whole circuit has to be linked to the motor? or the original circuit board the rc car has?
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I would suggest to just have it in the power supply to the motor, that way you can have the car function as normal when driven by the user, but have the circuit as a sub system which will cut the motor power if it senses an object.

To do that, you might want to look at circuits which use a transistor as a switch and put the transistor in the earth wire of the motor. This is all electronics and does not involve Arduino, there are many resources on the web that will give you all the info you need and with that I am off.

Duane B
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alright thanks bro!
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