A compact and versatile microprocessor board ideally suited for low-power dataloggers:

• high-quality 86 x 53mm (3.4" x 2.1") pcb with gold-finished contacts
• Freescale MC9S08LG32 microprocessor (up to 40 MHz HCS08 CPU core, 32 KB flash, 2 KB RAM, 12-bit ADC ...)
• LCD glass with 7 alpha-numeric characters + 4 digits
• MicroSD flash card adapter for datalogging (2GB flash memory cards are available for only a few dollars/euros, incl. adapter for SD readers)
• free C compiler and IDE with Processor Expert hardware configuration wizard and debugger can be downloaded from Freescale:
  Codewarrior HCS08 Special Edition (32k code size limit)
• low-cost BDM programmer available here
• TTL-level serial port can be brought to USB with a small dongle adapter for live transmission of data to a PC
• optional miniature solar photovoltaique cell to enable the device to operate indefinitely without changing batteries
• miniature joystick or optional capactive touch sensor numeric keypad for input
• runs on three AA cells (use rechargable AA batteries with the solar panel).
• Download sample C code for SD-card access with a PC-compatible FAT file system, LCD display, keypad and main processor modules
• Download installation guide

  72 euros  

Please indicate if voltage and charge current sense components and RJ45 socket should be installed or not - see below
(sd card and external accessories not included)

The LG32 microprocessor has a built-in LCD driver that makes it possible to use passive LCD glass modules.
This results in a very low power consumption of only 12-14 µA in stop3 mode, even with the display active all the time.
In a typical datalogger application, the microprocessor will periodically wake up briefly to measure and record the inputs and then return to a low-power mode, thus allowing it operate for a year on a single set of batteries. (With the optional solar panel and using rechargable AA-cells, it can run autonomously indefinitely.)
The charge current of the solar cell can be measured with circuitry included on the pcb, so that the datalogger can be used to monitor the available solar energy for determining the viability of potential solar energy sites, with the data being recorded on the MicroSD memory card over extended periods for later analysis.
Depending on which peripherals are attached, up to 14 input channels can be connected of which a maximum of 10 can be analog.
(See complete signal list)

The circuitry to measure the solar charge current and battery voltage occupies 3 analog inputs and 1 digital line - if you don't intend to use this, please specify when ordering so those compenents can be left off to liberate the mcu inputs.

Optional RJ45 socket can connect to a capture timer to monitor a wind sensor such as the TX23 from LaCrosse for anemometer applications (wind sensor needs to be purchased directly from one of their resellers).

The MC9S08LG processor operates on 2.7 to 5.5V, but SD flash cards only work with 3.3V, therefore a 3.3V regulator is used on the board.
There is circuitry to switch off power to the SD card when it's not being accessed to preserve battery power.
To make optimal use of the LG32 low-power modes, a 32.768 kHz crystal is installed as a clock source.

LG32 shown with optional capacitive touch sensor keypad, solar panel and usb-bdm background debugger programming pod (these accessories are sold separately).