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electronics-diy.com writes:
With this Stereo FM Transmitter with BA1404 you will be able to create a mini stereo FM station and broadcast to your entire home, a simple way to have an audio link wireless with ease. With the FM transmitter BA1404 Hifi Stereo you can stream your music from your iPod MP3, satellite receiver, computer, DVD player, Mobile Phone, MP4 player and MP3 and other audio source directly to an FM receiver with crystal clear sound.
Stereo FM transmitter - [Link]
enide.net writes:
I built my first power amplifier when I was still in secondary school. The circuit was made of transistors, didn’t provide much power and had an ugly PCB.
Around the same time I got access to a datasheet of TDA1524, a tone/volume control circuit, and I decided to use it to build a pre-amplifier, to improve the quality of the sound coming out of the amplifer. Both circuits worked well for almost a decade but the old amplifier was never up to my expectations.
In 2006 I decided that it was time to build a real power amplifier, this time based on an integrated circuit to reduce the number of external components and cost.
Stereo Audio Amplifier with a TDA2616 - [Link]
tonieletronica.50webs.com writes:
Circuit of stereo FM transmitter of of high quality using integrated circuit ba1404 for mp3, mp4, ipod, computer, radio of the car. Transmit of your equipment of portable audio for the radio of your car, transmitters of fm of low potency are the ideal for transmission wireless of audio sign for fm receivers. Mainly in that case that is treated of transmitter of FM stereo with ba1404. The heart of that circuit is the circuit integrated ba1404, that is a mini fm transmitter, that already counts with the necessary internal circuits for transmission in fm. just being necessary to increase some components discman or any other audio source turning the wireless. If you already set up other transmitters of transistorized fm it will see that when setting up that with having integrated BA1404, that the quality of the sound and the frequency stability is excellent. Besides the but it presents easy assembly.
Stereo FM Transmitter with BA1404 – [Link]
shine7.com writes:
This amplifier is based on the PA100 parallel amplifier detailed in National Semiconductor’s application note – AN1192.
Since my DIY speaker is 4-ohm and somewhat difficult to drive, I want to have a more powerful amplifier to match with it. Therefore I designed this amplifier which uses two LM3886 per channel, in parallel circuit. This amp can deliver about 50W into a 8-ohm speaker and 100W into a 4-ohm speaker. This is a stereo amplifier and therefore 4 LM3886s are used.
100W LM3886 Parallel Stereo Power Amplifier – [Link]
jendaelektro.ic.cz writes:
400W Stereo Audio Amplifier based on the original Marshall Leach involvement, but has made some improvements. Regarding the power supply voltage to the +-75V. VC comparing the performance of the modified Leach 700W/2R on one common board of both channels, as well as protection and control circuits for the fans. Compared to the 700W version a bit different in wiring. Because some things in the 700W version is completely tightened to perfection.
400W Stereo Marshall Leach Amplifier – [Link]
This stereo encoder is a halfway between analogue and digital processing. It combines the best from both domains to provide high-quality and easy to build device. The sampling frequency used in this stereo encoder is 97 times higher than the pilot tone frequency. This makes very easy to reject all spectral residues around the sampling frequency without affecting the main signal characteristics.
FM Broadcasting Stereo Encoder – [Link]
Ever wanted to build a highly dangerous, inefficient, yet awesomely retro piece of electronics? Well, I have. That’s pretty much what a tube amp is. Vacuum tubes are old electronic components that act like transistors, controlling a lot of current with a little current. You usually hear about tubes being used in guitar amplifiers, because they distort in a way that suits guitar playing. However, tubes can also be used to amplify a stereo signal from another audio source such as a CD or MP3 player. Tube amps, unfortunately, aren’t the most practical things in the world; they consume a great deal of power, get very hot, and are big. That being said, they look damn cool, and some people seem to think they sound pretty nice too. Kit is also available.
Building A Stereo Tube Amp - [Link]
Howard Gordon, of Surveyor Corp, sent us this announcement about a new, affordable stereo vision camera system for robots. I checked out the video with my 3D glasses. Pretty cool. [via]
This past week, we introduced a new open source 3D stereo vision system for robotics and remote monitoring called Surveyor SVS. It features dual processors, dual cameras, and wifi connectivity, and sells for $550. The SVS is intended for researchers, educators and developers interested in enabling depth perception in their applications without the need for an array of active sensors (e.g. laser scanners, ultrasonics, infrared, etc).
Surveyor Stereo Vision System - [Link]
This project supports both RDS (Europe) and RBDS (USA) Tuner FM band 88..108 MhZ (Europe and USA.) The schematic consists of two major subcircuits:
- The actual RDS/RBDS Decoder(TDA7330) with the PIC18F452 and the 4×20 LCD display
- The FM Stereo tuner with headphone amplifier.
You can choose between a 4×20 character LCD or a smaller graphical LCD to display data. A simple RS232 interface can also be used.
RDS/RBDS decoder - [Link]
The Stereo Tape Head Preamplifier kit is based on LA3161 IC from SANYO.
- Power supply – 9 ~ 12 VDC @ 20 mA
- Output power – upto 200 mW
- Input Resistance – 100 KΩ (Typ), Load Resistance – 10 KΩ (Typ)
- Low noise, good ripple rejection owing to the on-chip voltage regulator
- Berg pins for connecting power supply, input and output
- Power-On LED indicator
- Four mounting holes of 3.2 mm each
- PCB dimensions 51 mm x 54 mm
Stereo tape head preamplifier using LA3161 - [Link]
