I took a look at it tonight and the line-in power circuit on the Arduino is
messed up. It appears to still work over USB by itself, but nothing when
plugged in via the barrel jack. I tried replacing the voltage regulator but
they just seem to overheat like they’re shorted, so it’s something else. I’m
guessing the circuit that switches between USB and line-in power. Either way
we’ll need to replace the Mega. I left it disconnected along with the mount
screws in a little tray sitting on the print bed so it’ll be quick to swap out.
Adam
From: hackpgh-discuss-bounce@xxxxxxxxxxxxx
[mailto:hackpgh-discuss-bounce@xxxxxxxxxxxxx] On Behalf Of Ryan Priore
Sent: Sunday, February 26, 2017 3:59 PM
To: hackpgh-discuss@xxxxxxxxxxxxx
Subject: [hackpgh-discuss] Re: Mendelmax is broken
Bob,
It was working for me two weeks ago. I have extra Arduino Megas, and I will
swap out the next time I'm down.
Ryan
On Sun, Feb 26, 2017 at 3:57 PM Robert Berger <bob@xxxxxxxxxxxx
<mailto:bob@xxxxxxxxxxxx> > wrote:
The LCD screen doesn’t light and the Arduino doesn’t respond to connection
requests from the Pi.
- Bob
