M
[email protected]
- Jan 1, 1970
- 0
For the few dollars they cost, you get an awful lot of clever
electronics in those little thumb USB MP3 players.. a little TOO clever
for my application. I want to use one to play a sound effect when
triggered..once only per triggering. However armed with only one button
which, in various guises, turns it on, plays it (endlessly), pauses it
or turns it off, this is proving to be a mission that even a PIC cannot
resolve. The wretched thing seems to even sense if there is 1.5v going
up the USB (in which case if boosts it up to 3.3v and acts like a
player) or 5 volts (in which case it acts like a flash drive). Anyone
ever seen a schematic for one of these Chinese widgets (full of
unidentifiable chips) ?
M
electronics in those little thumb USB MP3 players.. a little TOO clever
for my application. I want to use one to play a sound effect when
triggered..once only per triggering. However armed with only one button
which, in various guises, turns it on, plays it (endlessly), pauses it
or turns it off, this is proving to be a mission that even a PIC cannot
resolve. The wretched thing seems to even sense if there is 1.5v going
up the USB (in which case if boosts it up to 3.3v and acts like a
player) or 5 volts (in which case it acts like a flash drive). Anyone
ever seen a schematic for one of these Chinese widgets (full of
unidentifiable chips) ?
M