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USB-DAQ
The data logger
that looks like a USB flash drive to a PC
USB-DAQ is a low cost data logger and process
controller. In normal operation it operates autonomously, collecting data and providing
control as required. An on-board real time clock is provided.
When plugged into a USB port, USB-DAQ appears on the PC like a removable disk. One
file, CONFIG.DAT, contains the application code. This
file is created on the PC from a Microsoft Excel spreadsheet. Other files may be used for logging data.
USB-DAQ uses the Mass Storage Device (MSD) USB profile.
It does not require USB driver installation, and so is immediately compatible with
present and future Windows, Linux and Mac operating systems
USB-DAQ can use internal flash memory for small amounts
of data storage, a 25AA1024 EEPROM chip for moderate data storage (128Kbyte). The
28-pin device can additionally use SD card memory and chips up to 1GB.
Features
• “Flash
drive” style PC interface - No drivers required
• Flexible instruction set
• Internal 8K flash or external serial memory up to 1GB
• USB 2.0 compatible
• 32kHz real time clock with leap year and DST
• Variety of I/O channels including:
- 10-bit multi-channel A/D
- Analog comparators
- Counter inputs
- Digital I/O with autonomous event-driven output
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