Or 3.3V, by changing the position of the jumpers: Then on each side you can decide which tension you want to apply to the power lines in the breadboard, independently: 5V like in this case: We connect it to the breadboard directly: The input voltage accepted is 6.5V - 9V DC. There are many different ones, here is the power supply module I want to show you, it’s part of the Elegoo kit I suggest you to buy, but also sold by other brands in this same shape and characteristics, you can search “Arduino power supply” on Amazon to see some alternatives: We’re going to soon introduce Arduino into our circuits, and all our Arduino circuits will work with those voltage levels. First because the battery will drain over time, not delivering the 9V advertised.Ī Breadboard Power Supply Module accepts an input through a barrel jack from a battery, a 12V adapter or any other source, and provides to our circuit a 5V or 3.3V tension, depending on our needs. In some of my electronics tutorials I connect the circuit to a 9V battery, because it’s very simple to start with and it’s quite easy to find.īut it’s not optimal.
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