The 3.3 regulator has to have a heat sink or it will go into
thermal shutdown, and sounds like what is happening to yours.? The display
drawa a lot of current.? My heat sink, a CPU finned?block which I
tapped for a screw gets very, very hot.?It is at least twice the size of a
normal TO220 heatsink.? Remember to isolate the heat sink from the
regulator as the tab on the 3.3V is common to the output and cannot be grounded.
?
Rick
KN4AIE
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Hi all,
Got Teensy loaded, JackAl built, and interfaced with the
display.
All voltage measurements good to go, Got the display up, can see
that the teensy was programmed correctly, but after several seconds (no touch
but not worried about that at the moment). Display shut down.
weird all
voltages still good all over the board.
(yea notice no heatsink on the 3.3
reg or 5v reg( will get to that).
any quick suggestions that i should take a
look at?
any way to get the display powered up and get some kind of display
to check that separately?
Vince
