Not all boards use the same voltage for logic levels. Before connecting your microcontroller or single board computer to a device, make sure that you understand logic levels with our tutorial!
Learn the difference between 3.3V and 5V devices and logic levels.
Don't forget to check out a few of the examples below using a logic level converter to protect your I/O pins and ensure safe communication between different devices.
Single Supply Logic Level Converter Hookup Guide
The Single Supply Logic Converter allows you to bi-directionally translate signals from a 5V or 3.3V microcontroller without the need for a second power supply! The board provides an output for both 5V and 3.3V to power your sensors. It is equipped with a PTH resistor footprint for the option to adjust the voltage regulator on the low side of the TXB0104 for 2.5V or 1.8V devices.
You can also add a transistor or relay to control devices operating at higher voltages like the tutorials listed below!
LED Light Bar Hookup
A quick overview of SparkFun's LED light bars, and some examples to show how to hook them up.
A crash course in bi-polar junction transistors. Learn how transistors work and in which circuits we use them.
Internet of Things Experiment Guide
The SparkFun ESP8266 Thing Dev Board is a powerful development platform that lets you connect your hardware projects to the Internet. In this guide, we show you how to combine some simple components to remotely log temperature data, send yourself texts and control lights from afar.
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