hi
I want to control several dc motors with two motor shields and two Arduino boards
is it possible to have an external power source for both of them?, I mean wiring + of the power source to + shield 1 and + shield 2 and - of the power source to - of 1 and - of 2
https://ufile.io/be0yo
It is certainly possible to connect several things to one power supply. But I wouldn't use a breadboard for the connections. They are not intended for the sort of high currents that "several" motors may draw.
Steve
slipstick:
It is certainly possible to connect several things to one power supply. But I wouldn't use a breadboard for the connections. They are not intended for the sort of high currents that "several" motors may draw.Steve
thanks for your answer,
you mean that for example if one motor needs 5A and two motors connected to shield1 and one motor connected to shield2 by using my wiring the current which gives to the shields is 15A? and it does not give 10A to the shield1 and 5A to the shield2?
No. I'm saying that if you try to put 15A or even 5A through the tiny connectors on a breadboard you will burn it out and nothing will work. You need more solid connections like soldered joints or good quality plugs.
Steve
I would not "daisy chain" the power. The second shield can get less power which may not be good. I would have separate + and ground wires going to each shield from the power supply.
Twisting wires together is an acceptable method of joining them if there is no movement or vibration.
Is your workbench moving or vibrating? Probably not.
groundFungus:
I would not "daisy chain" the power. The second shield can get less power which may not be good. I would have separate + and ground wires going to each shield from the power supply.
thanks, I know how to upload the image but it didn't work!
and about your answer, you mean that the wiring of the first image is correct?
Yes, except don't use a breadboard.
ok thank you so much
MorganS:
Twisting wires together is an acceptable method of joining them if there is no movement or vibration.Is your workbench moving or vibrating? Probably not.
Twisting is never an acceptable method in my book, not reliable, creates problems that are
utterly avoidable, better to use your time on unavoidable issues!!
Don't look behind any light switches in your house then.