Uh-Oh Battery Level Indicator Hookup Guide

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Contributors: Toni_K
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Introduction

Anyone running a battery-powered project knows how frustrating it can be when a battery dies or runs too low to prevent brown-out conditions. The TL431 in the Uh-Oh Battery Level Indicator Kit can help prevent these frustrations.

TL431 - Voltage Reference

COM-11078

SparkFun "Uh-oh" Battery Level Indicator Kit

KIT-11087
1 Retired

This guide will show you how to use your indicator after you have soldered it all together.

Suggested Reading

This is a pretty basic kit, but if you need a refresher on using a multimeter, soldering, or electrical characteristics, please check out the tutorials below.

How to Solder: Through-Hole Soldering

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The basics behind the batteries used in portable electronic devices: LiPo, NiMH, coin cells, and alkaline.

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Turn a large voltage into a smaller one with voltage dividers. This tutorial covers: what a voltage divider circuit looks like and how it is used in the real world.

Resistors

A tutorial on all things resistors. What is a resistor, how do they behave in parallel/series, decoding the resistor color codes, and resistor applications.

Diodes

A diode primer! Diode properties, types of diodes, and diode applications.

Light-Emitting Diodes (LEDs)

Learn the basics about LEDs as well as some more advanced topics to help you calculate requirements for projects containing many LEDs.

Electric Power

An overview of electric power, the rate of energy transfer. We'll talk definition of power, watts, equations, and power ratings. 1.21 gigawatts of tutorial fun!

How to Use a Multimeter

Learn the basics of using a multimeter to measure continuity, voltage, resistance and current.