Boss Alarm

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Contributors: AGlass0fMilk
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Resources and Going Further

Though it may seem like something out of a spy movie, you likely use this kind of technology every day. The infrared receiver in the owl's eye is the same you will find if you open up any modern TV or DVD player. That's right -- remote controls use this to send key presses!

Tenacious Lasers

Dramatization of your manager after the Boss Alarm is set up. (Clip from Tenacious D and the Pick of Destiny)

To Infinity... and Beyond!

Infrared communication has applications beyond breakbeam sensors and remote controls. NASA is using infrared lasers to speed up data transmission to and from Mars! It is also used in modern fiber-optic communication systems. For more on infrared communication, read this page on Wikipedia.

Infrared is one of my favorite communication methods to use in my projects. It is a pretty lightweight, cheap, and versatile platform. All it takes is a common IR LED and an IR receiver diode.

Another project I made for a hackathon was a multi-user chatroom that transferred messages across the room using infrared! My team even transmitted a picture over the channel. We called it IRC (pun intended, InfraRed Chat).

You can use this design as a basis for a number of other projects! See if you can modify the circuits to trigger other things using an infrared breakbeam sensor.

Aside from those mentioned in the tutorial, here are a few resources I used along the way:

If you are having trouble with the Teensy, browse through the board's website to find more information and tutorials.

If you have any interest in microelectronics, you might like this article on the internals of the 555 timer!

For more project ideas, check out these other great SparkFun tutorials.

Arduino Wireless Communication via the Electric Imp

How to communicate between an Electric Imp and Arduino using serial.

SparkFun Serial Basic CH340C Hookup Guide

SparkFun Serial Basic Breakout takes advantage of USB-C and is an easy-to-use USB-to-Serial adapter based on the CH340C IC from WCH. With USB-C you can get up to three times the power delivery over the previous USB generation and has the convenient feature of being reversable.

SparkFun QwiicBus Hookup Guide

Build a long-range, noise-isolated I2C bus with the SparkFun QwiicBus Kit featuring the QwiicBus EndPoint and MidPoint following this Hookup Guide.

1W LoRa MicroMod Function Board Hookup Guide

Everything you need to get started with the 1W LoRa MicroMod function board; a MicroMod function board that provides LoRa capabilities for your MicroMod project. Must be used in conjunction with a MicroMod main board and processor.