If you want to use through hole parts, just drill a hole through the
pads. The LM1117 is a TO-252 package, east to get and easy to solder in
place, easier than the si570. Jerry K5LRU
-------- Original Message --------
Subject: [minima] Re: Minima PCB (eagle cad's)
From: "Mac A. Cody" <maccody@xxxxxxx>
Date: Sat, February 01, 2014 4:45 pm
To: minima@xxxxxxxxxxxxx
I have some questions about the parts selection for Adrian's
Arduino controller board. First, what type of package is used
for the LM1117? It appears to be DPAK, although I am not sure.
Two leads appear to be of the through-hole type, while the
voltage output is a tab. Perhaps the voltage output lead is
not being used. Second, is there a compelling reason for using
surface-mount devices for the 22 pF capacitors attached to
the 16 MHz crystal? I can understand that leaded parts would
introduce inductance, but I wouldn't think that the clock speed
on the Arduino would be all that critical. There is certainly
enough board space to use through-hole capacitors where they are
located.
It would be nice to minimize the number of components with
specialized packaging in order to reduce cost and increase the
likelihood of part availability. Perhaps it might not be too late
to make a couple of "small" changes in Adrian's design with this
in mind.
Regards,
Mac AE5PH
