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| Comparing
sizes
between
the current style on the right, older original version in the
middle and
my own mini board with the R2LC receiver piggybacked on the left.
|
This is the prototype Mini Driver board.
For a
printed
Circuit
board that can
be
made
instead
(see
below)
|
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| It
is
a
prototype.
Heat
sink
is
electrically
isolated
from
SCRs
with
mica
insulator
and
plastic
washer.
The
board
assembly
uses
the
heatsink
for
mounting
to
the
chassis
also.
It
is
a
piece
of
1/16"
aluminum
1"
wide
X
2"
long
bent
into
an
"L"
with
holes
drilled
for
the
SCRs
and
amounting
screw
hole
on
the
bottom
of
the
"L" |
The Lionel R2LC
receiver
on
the
left
plugs
into
the mini driver
board
on
the
right |
 |
 |
| Width
less
than
an
inch.
|
Length
just
shy
of
two
inches
|
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 |
| Height
one
and
a
quarter
inch.
|
Testing
it
...
It
works!
|
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| This
is
the
Schematic
of
the
Mini
DC
Driver
Board.
Not
much
to
it. Note the use of a 100uh RF choke in the return side of the Track voltage. This is used for Two rail operation. All return leads of bulbs and smoke unit need to go to the Terminal number 3 also.
|
This
is
an
X-ray
View
of
PC
board
design For a list of parts and PC board Design CLICK HERE R2LC Receiver Pinouts
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