Circuits & Schematics - Audio - 9

joe The LED VU Meter was the height of late 80-s boombox technology. This instructable will build one out on the breadboard. Who doesn't like blinking lights.. You will need either the National Semiconductor LM3916 / LM3915 / LM3914 , 2 for ...

M. Batek Make a sound card is no more a complex issue. If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card. This sound card can be powered from USB port and has one stereo output. You ...

This circuit is for detecting any audio signal with justable noise offset. It could be used to generate a radio mute signal eg. from a PDA. The circuit is consisting of: Input impedance Signal amplifier Rectifier Justable comparator (Noise offset). ...

Have you ever thought of making your own portable speaker in a CD case? Here is how you do it. Components required 8 W speaker with 4 ohms impedance CD case ( Use the one with a zip would be good) 18 W Amplifier module (I used the Kemo #M033, you ...

Nophead Although I am fortunate enough to have a project room which is nearly 3 m by 4 m, as you can see it almost completely full of junk. The large glass fronted MDF box on the far left next to HydraRaptor is a 400 CD jukebox that I designed and ...

Tony Sambuchi I recently purchased a new cell phone and wanted to play my MP3's in my truck. My truck has the factory radio in it and did not alow me to do this. I once used a FM linker to play my MP3's but found the music quality very ...

Specifications The Tiny Audio Amplifier kit is a good choice for battery operation. It is based on LM386 IC . Power supply - 6 - 12 VDC Output power - 1 W, 8 Ohm The quiescent power drain is only 24 mW when operating from 6 VDC Self-centering ...

A homemade speaker using a plastic cup, business card, wire, magnet and some Lego blocks. I built this speaker from scratch; I was surprised of the quality of the sound. I doesn't look like a high-tech speaker but it works well. I didn't expect a ...

On February 2006, I puchased my first LEGO Mindstorms. On January 2007, I purchased my LEGO Mindstorms NTX, so I started to create some proyects with it. I found NTX makes easier to create projects using fewer parts. Here is my first NTX project: ...

It seems like everywhere you go, someone’s cell phone is playing a personalized ringtone. Whether annoying or clever, it’s your call, but inside your home, it’s still the domain of the boring “ding-dong.” Not for long, ...