Such as: soldering a connection for my power jack so that I can run my breadboard from a 9V battery.
To the right is a single LED powered by the 9V:
To the left is an LED controlled by a single switch.
Below are my videos of various configurations of LED with switches in serial as well as parallel and controlled by a potentiometer.
Ps I totally soldered the pot' too. Yep. I did that.
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