Subject: ir remote
Date: Sat, 14 Feb 1998 10:55:19 -0800
From: aj pollock <[email protected]>
To: [email protected]
My latest conversion to your PROgramit project is a Radio Shack PRO-2036.
This radio is similar in appearance to the Bearcat BC895XLT and BC9000XLT.
The keyboard matrix is connected directly to the CPU by very fine circuit
board tracks. The best way to connect wires to the proper signals
is to
solder them to empty plated-through holes on the circuit board.
Use an
ohmeter to find an appropriate plated-through hole for each of the
13 signal
wires(Y0 to Y5 and X0 to X6).
The CPU board is located on the rear of the front panel. You will
get
much easier access if you remove the front panel assembly. The
CPU is
the 80-pin IC that has "uniden" printed on it. Looking at the
rear of
the front panel you will see six diodes to the right of the CPU.
The
plated-through holes to the right of these diodes are the ones to connect
the wires for the Y0 to Y5 signals. Just above the Y signals
are the holes
for X1 and X0 signals. Use an ohmeter to find appropriate holes
for the
X2 to X6 signals, which will be in an area 3.25 to 5 inches to the
right of
the CPU. Verify all connection points with an ohmeter before
undertaking
the very delicate soldering on the circuit board. I used #30
solid core wire,
a sharply pointed soldering iron tip, and a steady hand. Power
for the
interface is tapped from the 5 volt regulator, a 7805, located on the
left
side of the scanner case.
Connections for the Radio Shack PRO-2036 are as follows:
The X and Y pin numbers refer to the 80-pin CPU located on the rear
of
the front panel. Pins 41 to 46 (Y5 to Y0) each have a diode connected
to them so wires should be connected to the anodes of those diodes,
not
the CPU pins. Since diodes are already on the Y lines none will
be required
in the interface circuit.
SEE TABLE ON WEB PAGE FOR SPECIFIC CONNECTIONS
I recommend the following "Program channel sequence" to avoid PROgramit
lockup when entering duplicate frequencies in this scanner.
MANUAL
ENTER CHANNEL
MANUAL
ENTER FREQUENCY
ENTER
DELAY
ENTER
Will you be making the source code for your IR REMOTE available for
those
of us who can program their own PIC chips?
Thanks again, John, for a great project!