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TCP/IP Voltmeter - version 6V6T

TCP/IP voltmeter 6V6T enables to measure 6x DC voltages and 6x temperatures through the internet. It includes a 6 DC voltmeters and 6 thermometers. Voltmeters are not galvanically isolated from the board. It has low power consumption and it is a perfect equipment for automation and remote measurement.
TCP voltmeter/ammeter

TCP/IP Voltmeter 6V6T features :

  • contains 6x DC voltmeters and 6x thermometers
  • full HTTP server on port 80
  • reading data via web browser, SNMP client, TCP client, XML file ( AJAX )
  • SNMP agent v2
  • TCP server on port 9760 ( hardcoded )
  • static and dynamic IP address
  • wide range of power supply voltage ( 5-35V DC )
  • software and tools for experiments
  • android mobile application available
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TCP/IP Voltmeter 6V6T pictures

View of the TCP voltmeter from different sides.
TCP voltmeter/ammeter TCP voltmeter/ammeter
TCP voltmeter/ammeter TCP voltmeter/ammeter
Move cursor over the image to see a larger image.
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TCP/IP Voltmeter 6V6T hardware

TCP/IP voltmeter has 6 voltmeters and 6 thermometers. All voltmeter channels have a common ground. You can measure 6 voltages simultaneously, but they must have a common ground. If you need to measure voltages that do not have common ground, you can use TCP voltmeter V11.
      On the voltmeter input is voltage divider followed by operational amplifier. The output of operational amplifier is connected to PIC18F67J60 microcontroller which has several 10-bit A/D converters. Measurements in the internal A/D converter is fast and microprocessor performs one measurement per second for all 6 channels. Thermometer uses sensor DS18B20. The measurement is performed every 10 seconds for all six thermometers.

Technical parameters

  • Voltmeter measurig range : 0 to +70 V DC
  • Voltmeter resolution : 0,01 V
  • Voltmeter input impedance : 1 MOhm
  • Voltmeter speed measurement : 1 time/sec
  • Thermometer measurig range : -25 to 120 C
  • Thermometer resolution : 0.1 C
  • Thermometer speed measurement : every 10 seconds
  • Thermometer sensor DS18B20, length 1 meter


  • Board size : 134 x 91 mm
  • Supply voltage : + 6V to + 35V DC
  • Current consumption : 160 mA / 5 V
  • Datasheet [ link ]
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TCP/IP Voltmeter 6V6T schematic

TCP voltmeter 6 channel schematic
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TCP/IP Voltmeter 6V6T screenshots

HTML pages are stored in FLASH memory. User can modify them or add your own sites. More information in the datasheet.
Screenshot main page Screenshot TCP voltmeter Screenshot  TCP voltmeter
Screenshot  TCP voltmeter
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Tools & applications

Android application for TCP voltmeter. You can use this app to connect to TCP voltmeter from your mobile phone.
Dowload from Google play :
Get it on Google Play

Datasheet for TCP voltmeter 6V6T

Download datasheet [ Size : 973 kB ] : datasheet
( comming soon )
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