LOG08 One Wire Sample Logger

Introduction  Description Schematic Instructions  Software Vintages  FAQ News References Ordering Information Download the Instruction Manual Here

Please note that LOG08 is now discontinued and has been replaced by LOG08-II.  Go here for information about this new product.

A Serial 1-Wire Recorder

This project builds on the success of it's predecessor, TEMP05.  LOG08 retains many of the previous features of the TEMP05, and adds some extras.

Features of the LOG08 include;

• Standard RS232 serial interface between the Dallas/Maxim 1-Wire bus and a host PC

• provides real-time relief for the host PC by removing the burden of providing the precision timing required by the 1-Wire bus

• No connection to PC required for stand-alone logging

• Polling display support for the following 1-Wire environmental sensors;

  • DS18S20, DS18S20-PAR, DS1822, DS18B20 and DS1920 temperature sensors

  • DS2438 based Humidity Sensors

  • DS2423 based Lightning counters and General Purpose counters

  • DS2423 based Rain Gauges

  • AAG 1-Weather Station (OWWS) for wind speed, wind direction and outdoor temperature

  • Bray/Jennings DS2438 based Barometer

  • Dallas/Maxim iButtons (for security applications)

  • Midon 1-Wire Relays (not yet released)

  • Midon 1-Wire Humidity Sensor MD3020E

  • Midon 1-Wire Voltage Sensors (not yet released)

  • Midon 1-Wire LED Displays (not yet released)

• Logging support for the following 1-Wire environmental sensors;

  • DS18S20, DS18S20-PAR, DS1822, DS18B20 and DS1920 temperature sensors

  • DS2438 based Sensors

  • DS2423 based counters

  • DS2450 based voltage sensors

• Easy option programming (Set and Forget) - NO option jumpers required.

• Capability to interface up to 60 different sensors

• On-board DS2438 temperature sensor

• Optional on-board humidity sensor

• On-board analog voltage input

• Connectivity to 1-Wire bus via either terminal strip or RJ-12 connector

• Large EEPROM capability for sensor logging

• Discrete commands for setting all important parameters

• Real Time Clock for displaying time of day with results of sensor polls

• PCB Size fits into optional PacTec CM5-125 case

• EASY software upgrades via recyclable processor changes

Here is what LOG08 looks like (shown with some options included):

Connector Definitions

• J1 Power Input connection.  12 to 16 Volts AC or DC required

• J2 Optional input/output connections.  Not currently used

• J3 1-Wire and external interface.  Analog In, +12V, +5V, GND and DQ provided.

• J4 Serial Interface connector.  Standard DB-9 female connection.

• J5 RJ-12 interface for 1-Wire bus.  +12V, +5V, GND and DQ provided.

• J6 Not used