Remote Display

Data Logger.

Parts required for hub;

• PIC18F452
• 4.0MHz crystal.
• 2 x 27pF Capacitors.
• MAX232.
• ULN2803 (8 bit relay driver).
• 24LC256 (32K x 8 EEPROM)
• PCF8583 Clock/calendar
• 32.768KHz clock crystal.
• 3 - 28pF trimmer Capacitor.
• 4051 analog multiplexer (for alarm module).
• LM393.
• 7805 regulator.
• 470uF Capacitor.
• 6 x 10uF Capacitors.
• 3 x 0.1uF Capacitors.
• 4.7K ohm resistor.
• 2 x 220 ohm resistors.
• IC's.
• Programs 16-Jan-2010.

Specs;

• Data logger (holds 1 year of results).
• Timer to water garden if less than 5mm rain.
• Adjusts for Day light savings.
• Adjusts for leap years.
• View past results (max, min etc).
• Display temp, rain fall & humidity.
• Display pressure and pressure trend (bar graph - 24hr period).
• Display system voltage.
• Alarm and status.
• Modify date, time etc.
• Battery backup.
• Dump data to PC - RS232.

Remote display.

Parts required;

• PIC16F84
• 4.0MHz crystal.
• 2 x 27pF Capacitors.
• 10uF Capacitor.
• 1uF Capacitor.
• 470 ohm resistor.
• 3 x 4.7K ohm resistors.
• 100 ohm resistor.
• 180 ohm resistor.
• 10K ohm trimpot.
• 78L05 regulator.
• Mini PC mount buzzer.
• 2 x 16 LCD display (with backlight).
• Plastic box 150 x 80 x 30.
• 12 key numeric keypad.
• Vero board.
• 2 x 2 way - PCB mount screw terminals.
• Wire and solder.
• Nuts and bolts.
• 8 x nylon spacers (for keypad & display).

Only 4 wires required to connect back to hub, +12v, GND, I/O data & Clock.

Alternatives.