Electronics Tutorials

These electronics tutorials are designed to give the beginner enough information to help with Arduino exploits without getting too complicated. They are not a complete course in electronics.
Electricity - Voltage and Current

Electricity - Voltage and Current

It is common to use water as an analogy to electricity because the analogy works so well. We'll use it here, too. Electricity in a battery is like water in a water tower. To get higher water flow through your pipes you must make the water level in the tower higher.

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Resistors, Capacitors, and Inductors

Resistors, Capacitors, and Inductors

Resistors resist the flow of electrons, hence the name. They can be used in to limit the current flow, such as current limiters for LEDs. The amount of current that flows through a resistor is proportional to the voltage applied.

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Diodes, Zeners, and LEDs

Diodes, Zeners, and LEDs

Diodes are semiconductor devices, meaning they are conductive under certain circumstances and not under others. When a diode has voltage applied one way, it will block current from flowing. Reversing the polarity will cause it to conduct just like a wire.

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Arduino LED Tutorial

Arduino LED Tutorial

Interfacing different types of light emitting diodes to the Arduino.

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Using Photoresistors

Using Photoresistors

Use a photoresistor to sense light with the Arduino.

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Arduino Potentiometer Tutorial

Arduino Potentiometer Tutorial

Digital is wonderful, but sometimes you just have to have a knob. A potentiometer satisfies the knob requirement, and the Arduino converts the resistance into digital.

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Arduino Thermistor Tutorial

Arduino Thermistor Tutorial

A thermistor is a thermally sensitive resistor. If you know the value, you can know the temperature (with a little work).

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Hall Effect Sensor

Hall Effect Sensor

The Hall effect sensor detects a magnetic field, and in this case, switches an LED on and off.

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