The hardware design is not difficult.
Here are the port/pin connections:
AT90s8515 PINS/PORTS ->
(Transmitter) Holtek 640 Data Pins
1 pin to Transmitter TE,
7 pins to Keypad
LCD connection as specified in lcd.h
(Receiver) Holtek 648l Data Pins.
Keypad and LCD is connected as demonstrated in class, and the tranceiver and holtek chips are connected as shown in documentation (shown below).
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