I am making a circuit without using a PCB or perfboard and i am unsure if i am running the ground wire correctly. Grounding layout

I usually prototype on a breadboard with the ground all joining on the far right, is this the same concept? I wanted to know if this is the accepted convention for running the ground back to the board.

  • For a basic circuit like this you don't need to worry terribly about the grounding details. It's when you have higher speed and more complex signaling that it really matters. Commented May 5, 2017 at 14:46
  • @IgnacioVazquez-Abrams My final circuit is utilizing 20 pins running 2 LEDs each in parallel on a blinking program. Does that fall into the "complicated" category or is that still on the simpler side? No motors, rotors, ICs, isensors, Etc Commented May 5, 2017 at 14:57
  • The only problem I see is running two leds at (looking at the resistor value) 20mA each on only one pin. 40mA is the absolute maximum rating of a pin. 20mA is generally advised. There is also a maximum current per section of pins (see datasheet). So depending on the pattern of lights, you might run into a limit there.
    – Gerben
    Commented May 5, 2017 at 15:16
  • Consider using a LED driver chip instead, running the LEDs in series with a higher voltage. Commented May 5, 2017 at 15:39
  • Further to the above point. 20pins at 40mA (ie: all lights on) is 800mA which is more than the micro can safely source.
    – Mazaryk
    Commented May 5, 2017 at 16:33

1 Answer 1


Yes, based on basic electrical theory, you have the ground connected correctly.

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