Boing Boing reader Ross "rossindetroit" Hershberger created the Monobox, a nice speaker with a built in amp based on the venerable LM386 IC. MAKE produced a nice how-to video about it for its Weekend Projects program. This is a great project for parents and older kids (I'm guessing 9 and up).
MonoBox is a small, inexpensive powered speaker that amplifies the output of your headphone music player. It's little but it's loud! All the circuit parts are available from RadioShack. The speaker and cabinet are left to your preference.
You'll learn how to assemble and solder an audio power amplifier using an integrated circuit (IC) chip, and how to choose a speaker and install it in a cabinet with the amplifier.
The core of MonoBox is a compact and efficient audio amplifier based on the LM386 power amp chip. It will run on 200mA of current using power supplies from 6V–15V DC. This gives you the flexibility to power it from a wall adapter, a 9V battery, or a car accessory outlet.
You're probably thinking, "Sure, but it's so small. Does it rock?" Fair question. The prototype has been exhaustively tested and it does indeed rock. Maximum volume output is 90dB, and with the added bass boost your socks will be rocked clean off!
Complete step-by-step instructions for making a MonoBox
Jimmy DiResta shot this video of his spoon-making process for MAKE. Lately I have been seeing the complexity inside seemingly simple objects. I recently made a simple bell in brass, which caused me to look at other products I can challenge myself to make. A funny thing is that I approach the creation of a […]
I just watched a few of the demo videos for the Shaper Origin. It’s a handheld, computer numerical control, router that allows you to cut precise shapes into flat stock. Since it is handheld, there’s really no limit to the size of the things you want to cut out. Looks really cool. It costs around […]
Brian Mix shows off his replica Jupiter 2 computer, a remake based on the 1960s TV Lost in Space show — which was also used as the 1966 Bat Computer in the Batman TV show.
While Netflix and Hulu have seemingly dominated the streaming market with their limited selections, we’ve looked a little outside the box and found something pretty great as an alternative. SelectTV combines all the content of cable with the convenience of streaming, and it’s affordable too.SelectTV is an online subscription service that packs an impressive library of over […]
These days, the vape market is saturated with low-quality products, making it nearly impossible to separate the gems from the duds. The Atmos Rx Dry Herb Vaporizer stands out from crowd for two reasons: its impressive battery life and durable construction. This high-end little gadget is compact enough to fit in your pocket, and packs a powerful punch, […]
If you’re like us, you occasionally get ambitious with your dinner and try to cook multiple sides plus a main dish. These efforts usually end as a cold meal plus a pile of dishes to wash. MasterPan Multi-Sectional Meal Skillet makes it super easy to make multiple dishes at once without the hassle. This heavy gauge bottom pan […]