From the course: Introduction to MicroPython and Physical Computing
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Circuits
From the course: Introduction to MicroPython and Physical Computing
Circuits
- Microcontrollers are generally connected to sensors and other components depending on the application. There are lots of components available from basic building blocks like buttons, light emitting diodes and resistors to more complex components like clock modules, displays, and distance sensors. Components are connected in circuits. For example, if you connect a battery, a resistor, and an LED, this is a complete circuit and the LED will light up. Often, you'll see circuits described using what's called a schematic. A schematic symbol represents each component. Here you can see a battery, a resistor, and an LED. The circuit goes from the positive side of the battery through the components to the battery's negative or ground side. Circuits are driven by voltage and current, voltage that's not in a circuit has potential, but nowhere to go. Current is the going part. When voltage is connected to a complete circuit, current flows and things happen. For example, an LED lights up or a…
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