Readers Hauke and Jakub write in with their experience building the MonoBox Powered Speaker. Hauke built his into a stained teabox with modded pot and LED; Jakub built a stereo version into a treasure chest with an illuminated switch and also cleverly hides the audio player.
Weekend Projects makers John and Scott write in with their experiences building the MonoBox Powered Speaker, along with images that show their custom mods to suit their tastes and needs.
Robert Scoble interviews Charles Sprinkle, a systems engineer at Harman, a maker of audio equipment. Sprinkle uses Arduino and 3D printing in the design, testing and improvement of new speakers at Harman. It is good to see real examples of the maker toolset in the workplace. (via Scobelizer channel on YouTube.)
Complete instructions for this episode of Weekend Projects can be found at
http://makeprojects.com/Project/MonoBox+Powered+Speaker/2396/1
Learn the basics of audio amplification with a portable powered speaker that you build yourself. With some light soldering and clear step-by-step instructions, you will first wire up a simple amplifier circuit using a popular IC. Then, outfit an enclosure with the speaker you want, and design the enclosure to suit your style. Lastly, plug in your MP3 player or any 1/8″ line-in source and rock out!
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.
At the start of Back to the Future, we find Marty in Doc’s lab, standing in front of a six foot tall speaker with a guitar in his hands. One strum on the strings sends him flying back into a bookshelf, emerging covered in debris. This scene was the boyhood inspiration for two University of Wisconsin students and their attempt to recreate that speaker.
The latest addition to our Weekend Projects series is an Optical Tremolo Box. Inspired by Charles Platt’s article about online DIY guitar stomp-box communities (MAKE Volume 15, page 82, “Stomp Box Basics: Tremolo and Fuzz”), MAKE Technical Editor Sean Ragan took up the challenge of building this project. He used a cadmium sulfide photoresistor as […]
