And resistors aren't polarized like LEDs, so their orientation doesn't matter. The resistor limits the current flowing in the whole circuit, regardless of whether it comes before or after the LED in the circuit– it’ll work either way. The current will flow from the battery through the resistor and LED and then back to the battery. As we covered in a previous video about LEDs, the positive side is connected to the battery's positive side and likewise negative to negative, with the resistor in series with the LED. Here is a diagram of a basic LED circuit. A 3x AAA battery holder with switch DK #1528-1151-ND.To make a simple LED and battery circuit, you will need: You’ll learn how to hook up some LEDs to a battery pack and also a simple circuit for playing audio. Today we're building some simple circuits without the need for any code or programming.
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