Fuel injectors are in all modern vehicles but you have probably not played with one since it is not a common replacement item. Jeremy Lang demonstrates his Fuel Injector Test system and shows off how an injector works. If you are interested in building your own Jeremy has made the build details available here (https://www.dropbox.com/sh/lw8dl8vt7igtgxh/AADgvF_Ska-24dXnZktGyuZPa?dl=0).
Gravi Capa is building a great looking Arduino Mega based speedometer and tachometer. It is still a work in progress and hopefully Gravi shares all the build details when he is complete. You can see the display performing a self test above and a rev test below when he tied it into his Honda motorcycle. The LED based display should look great in all lighting conditions!
The Ben Heck Show has a cool DIY Animatronic Puppet Head project. This project listens for speech and moves the puppet mouth accordingly.  “In this episode Ben sets out to help Backflip films with their upcoming puppet movie The Princess Knight. The film requires its actors to memorize prerecorded dialogue in order to match it with the mouth of a puppet. In this episode Ben sets out to create an animatronic
Language Warning on this video by AvE. If some swear words turn you off this video isn’t for you. This is the type of project that could come in handy when you find yourself stuck in the bush with no stores in site. We are shown how to use the resistive properties of the pencil lead to act as a voltage divider and drop the voltage to a save level for
 If you are a heavy sleeper you might need an Alarm Clock that Opens Window Blinds. What better way to wake up than some rays of sun shine, this is assuming that you are trying to wake up in the morning when the sun is out. If you are a shift worker this might not work very well for you. “It is created using a Spark Core micro controller,
If you have some RC gear and a few bits of GPS electronics this project that iforce2d built might be worth a look.  Have a look at it in action at 2:40.  The user has a GPS module and the car has a GPS module, the module with the person sends its position to the car and the car goes to that location, issue with GPS is that it isn’t very
 This GPS Guided RC Boat project is a great way to capture some interesting pre-determined navigation scenes. The boat does a great job of navigating until it hits something or gets swamped. Joseph Fortune has a page that provides build details and code so you can make your own.  “Here is a rough layout of the parts. The 9V battery hooked to the engine was actually one of those 7V rechargeable
