I have an arduino nano what only has 2 ground pins, but i need to ground a servo motor, an ultrasonic sensor (These 2 i have already done) and a battery pack (This i have not done. Is there anything i can do? maybe switch the battery pack to the same port that the nano uses?
Is this the classic Nano, not one of the new Nano 33 or whatnot?
There is another ground pin on the ICSP header on the classic Nano.
If the servo is powered by the battery (which it should be) connect the servo ground to battery ground, not Nano ground. Avoid high currents through the Nano ground traces.
ALL can be wired to the same ground pins. The 2 pins on the Nano are already connected together by the board traces.
What do u mean by connect the sergo ground to battery ground and not nano ground? Im still decently new to arduino sorry.
Well, there are these:
I'd just twist or solder some wires together.
It’s means ….Servo black wire to battery negative directly , battery plus to servo positive ( red ?) .
This is done so the fine circuit traces on the nano do not have to carry the current for the servo.
This is always good practice and can have additional benefit in terms of electrical noise and maybe even A/D accuracy.
Dont supply the servo with a higher voltage than its specification.
The idea with Nano is that you build your prototype circuit on a breadboard. When it is complete and tested, you can solder it to stripboard or Protoboard or even a custom designed PCB.
What you should not do is connect wires directly to the Nano floating in side a rat's nest of other wires.
If you use a Breadboard or stripboard, there will be no problem with the number of ground pins, you can connect as many as you need.
In this picture you can see that there is a black wire connecting the Nano ground pin to a ground "bus" at the side of the breadboard. This gives you over 20 more places to connect ground wires.
1 Like
Motors draw a lot of current. The PCB tracks on the Nano are narrow and thin and not designed to carry much current. So don't route the current for motors through the Nano. Give them their own direct wires back to the battery pack or power supply.
Not clear what you mean.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.