4 Channel Temperature Data Logger Circuit

This circuit is a temperature data logger circuit, a microcontroller based circuit for temperature data logging via the serial port of any pc from between 1 and 4 remote digital temp. sensors, DS1820/DS18S20 made by Dallas.


------Features of the Temperature Data Logger--------

• Realtime data via the serial port.
• Interfaces up to 4 x DS1820 sensors.
• Accuracy to 0.5 degrees centigrade
• Fahrenheit scale selected by a jumper
• No external power required
• Data stream easily logged & processed.
• Over 200m distance for each sensor
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The sensors of temperature data logger may be located more than 200 yards from the PCB. Check that the remote VDD is above 4.4Volts. It's recommends 10uF tantalum capacitors be placed across the power supply pins (not supplied) to minimise random errors and possibly get increased range.

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 Download :
- Circuit Schematic and Parts List
- Sensor Specs DS1820 DS18S20
- Software for Windows and DOS
- Source Code
- Terminal Emulator