picprogrammertransistors
I am building a PIC micro-controller programmer named Brenner8: http://www.sprut.de/electronic/pic/projekte/brenner8/
Although, it needs a BF959 transistor for (Q8), and BAT43 diodes for (D1,D2,D4) As this diagram:
I don't have these components in my country. All I have here: BF759, BF859, BF869, BF871, BF872, BF891, and BF981 for transistor.
Any suggestions?
The dsPIC seems to be not powerful enought to play an mp3, although you can use a dedicated chip to decode and the dsPIC to play the music and read the file on the SD card. A tutorial on a similar project can be seen at http://www.uchobby.com/index.php/2008/07/21/dspic-wav-player/
Microchip themselves have an application note on how to port Helix MP3 decoder to PIC32, (AN1367: http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en551513) so that may be the natural choice.
There are 6 versions of MBS1200.
The current loop one is only one of the options.
Please advise the fi=ull code on your unit so we can be sure of which versio you have - see table below.
If you do have the current loop version you need to tell us what power supply you have available. See table and chart at top of page 3. You need at least 8 volts and 2 or more would be better.
Report back ...
Best Answer
According to the text on the website a BF959 is used because it has a low Cbc. My best guess is that this is important only for PICs that require a fast pulse train on the MCLR pin to get into programming mode (eg. PIC32). You could check the Cbc in the datahseets of the transistors you have and pic a candidate.
For other PICs a normal NPN is probably OK.
For the diode you should use a schottky type, any smalls schotkky will probably do.