Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

DIY small and cheap MP3 player

This MP3 player project look interesting and cute. Despite its small size it has a great functionality including: up to 4GB FAT16 formatted CD/MMC memory card support (now supports SDHC cards); low power operation from single AAA Ni-MH battery; Up to 256 kBps bitrate at 44,1 kHz supported. VBR may peak at 320 kBps; support of ID3 v2.3 tags; full control of volume track, pause, skip, directory with 5 way small joystick. Real time display from Nokia 3310 (shows bit-rate, sampling rate, elapsed time, song info); adjustable LCD contrast; Shuffle, random play; upgradable software via RS232 bootlaoder. MP3 player is based on PIC18LF452 along with VS1001K MP3 decoder chip. Great project to put hands on. If you don’t want to mess up with building circuit you can always order a kit and enjoy. It bet it is real fun to listen MP3 from home made player. Continue reading

Powerful MP3 player in a mint box

There are quite many MP3 player projects done by enthusiasts. So here is another one which works with compact flash cards, handles FAT16 and fits in Altoids mint box. Player runs on PIC18LF452 microcontroller which handles flash card interface and sends data to STA013 MP3 decoder chip. Decoded digital audio is converted to analog by CS4340 DAC. The project is running from 3.3V LiIon battery. MP3 player also has a MAX756 DC boost regulator that allows using different batteries like couple AA Alkaline. In order to get rid of cables there is an optional FM transmitter MAX2606 to play music via car radio receiver. And last shot is USB connectivity, so it is possible to upload/download files and even charge LiIon battery via MAX1811. Latest project files can be downloaded form here. Continue reading