How can I increase the current on my Arduino?
Learn how to create a circuit to increase the electrical current of the Arduino pins to activate loads that need more electrical current. Between the several types of Arduino and other Microcontrollers, we have a problem: the low capacity of electrical current sourcing of the pins. Where this value can vary between 6 mA to 40 mA in some models.
How is the current supplied by the Arduino pin?
As is possible analysis, in this the circuit we use a transistor connected at the Arduino pin through a resistor (R1). Now, will be presented the process to design all circuit through three steps: First, we must calculate the base current, which is 10% of the load current value. This electric current will be supplied by the Arduino pin.
How is a transistor used in an Arduino?
The transistor will be used as a switch and will allow greater electrical current capacity for the load. And for this, we will use this circuit, which is presented in Figure 2, connected to the Arduino pin or any other CHIP.
What is the base current of an Arduino?
First, we must calculate the base current, which is 10% of the load current value. This electric current will be supplied by the Arduino pin. For this, we will consider that the load requires 100 mA, our value of Ib (electrical current to activate the transistor base) will be 10 mA.
What causes the carrying capacity of a connector?
The current carrying capacity of a connector’s mated contact pair depends mainly on: Contact material. Geometry. Spring force between the pin and receptacle contacts. These three variables determine the magnitude and stability of the resistance across the contact interface.
How does a transistor increase the current capacity of a microcontroller?
Through the presented problem, the circuit allows you to drive a load whose electrical current is higher than the pin of the Microcontroller can provide. And for that, we will use a transistor. The transistor will be used as a switch and will allow greater electrical current capacity for the load.