ICs
and
IC
sockets
•
All
ICs
are
mounted
from
the
back
•
ICs
are
provided
unsocketed except
for
the
IC401
–
You
can
add
sockets
if
you
like!
•
Positions
and
orientations
are
marked
on
the
silk
‐
screen
–
Pin
1
also
has
a
square
pad
•
The
voltage
regulator
has
the
same
case
as
the
two
transistors
– check
the
labels!
–
Orientation
is
shown
on
silk
‐
screen
Designation
Type
Comment
IC401
ATMEGA88
28
Pin
U201
LM324
or
LM2902N
14 Pin
U202
LM13700
16
Pin
U301
LM324
or
LM2902N
14 Pin
U401
SFH618
4
Pin
–
See
comments
on
next
page!
U402
78L05
3
Pin
transistor
‐
style
case
U403
74HC00
14
Pin