External Matrix Switches With Front LED Indicators
(v0.1)
Tutorial
written
by : wmz
&
stanz
What
You Need
Solder
Equipment,
Drilling
Equipment,
Wire,
2x DPDT-Switch,
2x 47ohm
Resistor,
2x 3mm
2.v LED,
Multimeter,
Label
Gun, Heatshrink.
All above
available
from usual
stockists.
Drilling
Explained
- 2x Rear
holes
are required
for DPDT-Switch
(see PIC's).
- 2x Extra
holes
are needed
inside
of case
for Locking
Lip (Locking
Lip is
smaller
hole).
IMPORTANT
- Fit
the DPDT-Switch
as Shown
in the
PIC (Locking
Lip is
UP).
- Use
the DPDT-Switch-locking-lip
as Navigation
point
for wiring.
- With
regard
to DPDT-switch
:- Green
wire is
attached
to shorter
leg.
- For
correct
operation
ENSURE
Matrix
Switches
(1 &
2) are
both in
OFF position.
Explanation
of Arrows
in PIC's
We
will use
DPDT-Switch-#2
for the
purpose
of the
Wiring
Explanation.
DPDT-Switch-#1
uses the
same wiring
except
the yellow
wire is
replaced
with white
and Matrix
Switch
is #1.
Left
Hand Side
Explanation
The Left
Hand Side
is purely
used to
Toggle
the Matrix
Mod Chip.
Yellow
wire on
DPDT-Switch-#2
goes to
OFF end
of Matrix
Switch
#2.
Green
Wire on
DPDT-Switch-#2
goes to
ON end
of Matrix
Switch
#2.
Right
Hand Side
Explanation
The Right
Hand Side
is purely
used to
Turn ON/OFF
the LED.
Yellow
wire on
DPDT-Switch-#2
goes to
3.3v POGO
of Matrix
Mod Chip.
Green
wire on
DPDT-Switch-#2
goes to
Front
Led (Long
Leg and
47ohm
resistor).
Green
wire from
Short
Leg of
LED goes
to ON
end of
Matrix
Switch.
PIC's
Example
of Matrix
Switch
Settings
Allways
ON
Test
Mode /
Disabled
