Computer/Embedded Technology


USB-linked data acquisition board

18 May 2005 Computer/Embedded Technology

The DLP-Temp2 is a USB/microcontroller-based 2-channel data-acquisition system pre-programmed with firmware for reading digital temperature-sensing devices. This board from FTDI is equipped with a type A male USB connector for direct connection to a USB port. No cable is required unless the board is to be located away from the PC, in which case a user supplied USB A-A (male-female) extension cable can be used.

The digital temperature-sensing device supported by the pre-programmed firmware is the Dallas Semiconductor DS18B20. Two of these sensors can be monitored simultaneously while connected to the DLP-TEMP2 via Category 5 cable at distances up to 61 m. The microcontroller used is the PIC12F629 Flash-based microcontroller from Microchip Technology with a FT232BM providing the USB interface.

The PIC12F629 is pre-programmed for reading the digital temperature sensors, but it can also be erased and reprogrammed with user code if desired.



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