I just built an mp3 player using the STA013 and CS4334 following the schematics on www.PJRC.com. When I send one of the sample mp3 clips on the site, the...
I am about to embark on a journey that involves a pjrc mp3 player and a bmw with a digital audio path. What would it take to have the player output coaxial...
Hi, In PJRC MP3, if the mapping DRAM block is bad or used, the contents of this 32 bytes FPGA's RAM can automatically(hardwired) select another (good) block of...
I searched the net ALL day, but could not find any document on how to make a 3 volt power supply out of the 7805 regulator! I am wondering if I could anyway. ...
I happen to like the Micrel MIC2951-03BM, its 8 pin soic and its much like a 7805 in that its linear (no inductors) and after wiring the pins up your left with...
I was wondering...I have an external USB CDRW that I took the burner out of to put in my computer (as an external CDRW it quept crashing my system). Now that...
... out of to put in my computer (as an external CDRW it quept crashing my system). Now that the enclosure is empty, shouldn't I be able to hook up the player...
You CAN'T get 3V out of a 5V regulator, what you can is get higer than 5V out of the 5V regulator. The only way would be to put the GND pin (pin 2) on a -2V...
What if I am using a desktop hardrive? Will that work? Thanks, James ... From: colonwq To: pjrcmp3@yahoogroups.com Sent: Thursday, April 21, 2005 9:03 PM ...
Using a 3.5" HDD you could use your external drive case. If all your doing is just disconnecting the HDD from the player and connecting to the USB enclosure to...
Managing the USB connection/disconnection should be quite simple. All one has to do is to detect if the +5V pin of the USB connector is powered or not. You...
It is possible to get 3V from a 5V regulator. You have to put a 3V Zener diode circuit after the 5V regulator. It wont' give you much current, but it will...
Thanks to Michael Kusch. Power supply: The orange wire in my PC power supply would not work, as it is always on 5.3 Volts!!! it is an old power supply anyway. ...
what about the FILT pin (#19) of STA013, I am wondering what capacitor value should be used in series with the 1kohm resistor, as i really can not tell from...
As far as I know, the inductor is used to filter noise from the power supply, because a noisy power supply will make noise on the analog output. There is...
... A relay should be what is needed. When power is available on the USB board's IDE pins, the relay would throw to power the drive from the USB board. The...
When I using mp3 player in car I hear very little noise such as HDD motor and engin motor injection and many other noise when any thing starts for example if I...
What you describe are current peaks causing noise on your voltage supply. To filter out the noise you need to add a high value electrolitic capacitor to your...
That's right. A relay is needed. I mis spelled "relay" and wrote "realy". What I meant is I would use the USB_+5V to drive a transistor, and then the...
I didn't need to use a transistor, I got around it by using a DPDT 6V relay, I connected the coil to the mp3 players +5V supply jumpers. When the mp3 player is...
... I'd like to expand on this answer a little bit. If what Michael suggests works for you, great; stop here. If not, read on. Big ol' electrolytics are...
Should i use the PIC16F877 MASTER SYNCHRONOUS SERIAL PORT (MSSP) MODULE for configuring and communicating with the STA013 I2C registers, or do I just emulate...
The PIC16F877 has only one MSSP module that can operate in only SPI OR I2C, not both. Furthermore, both modes share the same pins, so I think it would be...
Ups! I just realized the PIC's USART port can also be configured to sort of SPI. Using this port in Synchronous Master Mode and configuring the STA013 with...
The information you provided are very useful, thanks a million. Basicly, i am just starting from scratch, so i was thinking about the configuration first and i...
I think there is a better alternative for storing the MP3 test file: Serial Flash Memory. You can get up to 64kB I2C EEPROM chips in PID-8 format where you can...
I think i am gonna go for the PC as a supply of the mp3 data, as it looks as an infinite supply of data(more convieniet for presentation purposes, play list,...
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