user68988: I am currently working on an LED 4x4 cube, so here is my pre planned circuit diagram.
https://easyeda.com/editor-mobile/#id=ffca9f3303f242a185b950b0bee4fa29|


I am to connect 220ohm to each positive terminals.(16)

I am to use 4 transistors(2n2222) for 4 negative layers of which, collector terminal will be connected to the negative terminal layers , base will be connected to 4 analog pins through 1k ohm, and emitter to be connected to the GND pin of arduino. Using transistor as a switch.


Can my studio ground get damaged if connected directly without a resistor.
If no?
Is there any way to make it?
Explanation with circuit diagram will highly be preferred...
Thanks for your precious time...

user69739: No your gnd won't get damaged if you source current through it. If u need explanation let me know

68988: <p>I am currently working on an LED 4x4 cube, so here is my pre planned circuit diagram.</p>
<p><a href="https://easyeda.com/editor-mobile/#id=ffca9f3303f242a185b950b0bee4fa29%7C" rel="nofollow noreferrer">https://easyeda.com/editor-mobile/#id=ffca9f3303f242a185b950b0bee4fa29|</a></p>
<p><a href="https://i.stack.imgur.com/lrFuS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lrFuS.png" alt="enter image description here" /></a></p>
<ol>
<li><p>I am to connect 220ohm to each positive terminals.(16)</p>
</li>
<li><p>I am to use 4 transistors(2n2222) for 4 negative layers of which, collector terminal will be connected to the negative terminal layers , base will be connected to 4 analog pins through 1k ohm, and emitter to be connected to the GND pin of arduino. Using transistor as a switch.</p>
</li>
</ol>
<p>Can my studio ground get damaged if connected directly without a resistor.</p>
<p>If no?</p>
<p>Is there any way to make it?</p>
<p>Explanation with circuit diagram will highly be preferred...</p>
<p>Thanks for your precious time...</p>
 69739: <p>No your gnd won't get damaged if you source current through it. If u need explanation let me know</p>
