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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.

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  • 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. May 5 '17 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 May 5 '17 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
    May 5 '17 at 15:16
  • Consider using a LED driver chip instead, running the LEDs in series with a higher voltage. May 5 '17 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
    May 5 '17 at 16:33
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Yes, based on basic electrical theory, you have the ground connected correctly.

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