Hello Everyone! Total newbie here. I have built 2 separate but very similar (different code for each) fire fighting robots in the last few days and both did the same wrong thing. I am not the creative type and I didn't come up the schmatics on my own. The first one I found on YT and the second I found here. The first one I made went AWAY from the flame. That seemed easy enough to fix so I switched some wires around. It didn't help and on my third (something in the back of my mind said not to do this on that particualr set of wires, I should've listened but I needed to know) switching of wires it started to smoke. Ended up melting some wires and burning up a motor driver. I thought I should start over with a different model and code, that's when I came across the one here. When I test this one this is what happenes: it turns 180 degrees around ending up facing away from the flame. I followed the directions EXACTLY and checked and double checked. I think it is very stange that I'm having the same problem with both builds. The first one I used four wheels and four motors and though maybe I crossed some wires on that one, but the one I found here only uses two wheels and motors' very staightforward wiring on that one. Also I used two separate sketches, the ones provided by the individuals who posted their projects. Intuitivelt this seems like a simple problem to figure out, but I have not been successful yet. Can anyone help?
Yes, I have checked the wiring multiple times. The sensors' DO pin is connected to Arduino pins 8, 9 and 10, VCC to 5V of Arduino via breadboard and ground of Arduino via breadboard. I switched the pins on the left and right sensors to troubleshoot, no change. The motors are connected to the motor driver pins A+ A- and B+ B- which seemed the only obvious place to connect them and I assumed that one motor goes to A and one motor to B, not one wire from each motor going to A and one wire from the same motor going to B.
You need to understand whether the motor is turning reversly! If so, you need to change wiring or change the code.
Thanks so much, Sourav! You are correct, I changed the motor wiring and it goes towards the flame now. I assumed that red motor wires went to + and the black to - but it seems that they can be arranged in whatever way works for the user! Now I just need to figure out how to slow down the robot, I didn't write the code as I mentioned above so I'm not at all sure where or how to slow the speed of the motors.
Glad to hear that.
Please make a new thread and ask the question as a new question so that everyone could know your problem and help accrodingly.
Thanks a lot.
Sourav Gupta
PermalinkHave you cheked the wirings of the motor and sensor?
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Joined February 12, 2018 696Monday at 02:11 PM