
The Bass Bump Headphone Amp is an audio accessory you can build to improve all of your private music listening. It has enough power to give clear sound and punchy dynamics through most any pair of headphones, or even a set of small speakers. The custom bass enhancement circuit lets you adjust the music’s critical low-frequency spectrum to your taste.

I just finished mentoring a high school student in the build of a 4×4×4 LED cube for his senior project. I was sitting at the desk, looking at a small pile of LEDs left over from the build, trying to think of something fun to do with them, when my three-year-old daughter walked in, sat down, and started playing with her Lite Brite. The pegs, I realized, looked just like LEDs, which was all the inspiration I needed. Let's build a clock!

Zombies have to be one of the most iconic halloween costumes out there and with the popularity of AMC's "The Walking Dead", they are only getting better. However rather than going to the store and buying one of the many pre made outfits, with some liquid latex, torn up toilet tissue, a bit of cheap makeup, and a health dose of blood you can easily turn yourself into the walking dead.

One of the most useful sensors for automating a haunted house is a motion sensor. This sensor lets you activate your special effects only when a new group of people arrives. That way the surprise won't be ruined by people seeing or hearing the effects before they get close enough.
In this project, I am going to show you several ways that you can use a motion sensor to automate your Halloween setup.