Weekend Projects maker Chuck writes in with his custom Optical Tremolo Box, turning light-programmable waveforms into unique audio effects. He demonstrates four audio effects made by patterns drawn or painted onto re-used clear polycarbonate dummy discs from CD spindles.
Build a wireless “bug” by combining an amplified listener with a short-range FM transmitter. Hide the circuit in a book or other discreet object.
Complete instructions for this episode of Weekend Projects can be found at
http://makeprojects.com/Project/Covert+Listening+Book/2150/1
Connect an amplified listener with an in-car FM transmitter, and you’ve got a wireless bug. Place the circuit in a hollowed-out book with the microphone concealed by the dust cover, and you’ve got a super-sneaky covert listening device! Tune in via a FM radio receiver set to the correct frequency, and you’ll be able to hear through walls.
Build a motion-sensing alarm by combining a few common components: an Arduino, a PIR sensor, a piezo buzzer, and a breadboard. All you need is some jumper wire to connect them all, and the software to run it.
Complete instructions for this episode of Weekend Projects can be found at
http://makeprojects.com/Project/PIR+Sensor+Arduino+Alarm/72/1
This project is great for those beginning to build with Arduino, and requires no soldering. Using very few components, and some jumper wire, we’ll build a simple motion-sensing alarm. This project combines technologies we’ve used in previous Weekend Projects, including a PIR sensor and piezo buzzer. It’s great for practical jokes and doubles as an early warning system for the zombie invasion!
This is the quick, simple project that will take your haunted home to the next level, freak out the neighbor kid, and might even win you a cool prize!
The Repeat After Me: A Mintronics Memory Game project is a throwback to the era of Simon and Pocket Repeat. Even more than 30 years after its initial release, this electronic game remains a hit.
