AVR575, a "Little Ozzie Logger", (or a very simple but smart, controller board)
This little 3" by 4" board is designed as a small data gathering device, either saving the data in its internal 1 Mbyte of EEPROM, or 64 Kbyte of Ramtron FRAM and uploading to a PC on request, or connected to a PC/modem/GSM phone as a permanent or intermittent data gathering device sending data to a PC or remote base via the RS232 serial port.
It uses an ATmega32 CPU and has eight, 10-bit analog or switch/voltage
digital inputs with signal scaling and line termination/pullups, and can also
have four other I/O pins which can have power FETs as outputs, or be simple
inputs. It also has a Dallas/Maxim 1-Wire interface for transducers or memory
devices. The serial port can be link-selected to be a TTL level serial port
(to talk to Radio transceivers) or can be a 2-wire RS485 interface, allowing
multiple AVR575 boards to be spread along a 4000 ft cable, maybe connected
to a PC via a JED 995X RS232 to RS485 converter.
Options include a real time clock (with alarms for turning power on and off), and RS485 networking capability.
A different board loading adds a 4 by 20 or 2 by 20 LCD text display and a keyboard scanner for a 4 by 4 (or larger) keyboard. In this application, it might fit into a distributed display/data-entry/data-gathering application on an RS485 network or via a GSM phone or modem. Imagine factory monitoring, security systems, remote flow metering, temperature monitoring/control, etc etc.
See the drawing of the board: AVRbits.pdf and a detailed description of the board : AVR575.pdf.
It can be programmed in BASCOM BASIC or Codevision
C, or AVR asm.
This is a base for users making one-off application board, or prototyping a system which will use the AVR570 module in production, or even for TAFE student or hobby projects.
Across the top are spaces and pads for six 5-way
Phoenix 0.15" spacing screw socket connectors.
Across the bottom are double-row 0.1" spaced pads
for ribbon cable connectors with solder pads for each pin for wiring just
above them.
Vcc and ground tracks cover the board, and there
are hundreds of dual-pads for ICs or discrete components.
At the left-hand end is wiring for a 5 volt linear
voltage regulator and a MAX208E 4 TX, 4 RX chip for the two serial channels.
(Available as just a PCB or as a low cost kit with
essential components like the voltage regulator and heat sink, the MAX208E
RS232 chip and socket strips for the 64 AVR570 pins.)
AVR-ISP
mkII, In-System Programmer for all AVR microprocessors, in stock, $A75 +
GST
The AVR In-System Programmer is used for field upgrades of existing products
using the Atmel AVR Architecture. The In-System Programmer is based on the
STK500 Hardware and Software. It supports all in-System Programmable AVR
devices. It is supported by all AVR compilers (CodeVision, Imagecraft C,
BASCOM, AVR Studio). Because it runs from the PC USB port, it avoids problems
with printer port modes (ECC, Std, etc) and operates under all PC operating
systems with USB support.
It is supplied with a 6-pin programming cable, so is suitable for all
the recent JED boards and modules shown above.
(Because a 10-pin cable header is not provided, there is a problem in interfacing to older boards with the 10 pin ISP header, or boards like the JED 585, which has a 14-pin connector, formed by adding 4 extra pins to the Atmel 10-pin standard. We are quite unhappy that Atmel has dropped the 10-pin support without any warning, and will soon make available an adapter board to convert the 6-pin cable to the 10 and 14 pin standards. Contact JED for availability.
A full data sheet is available for download at: AVR-ISP mkII user guide
Note: The older serial RS232 port AVR-ISP is no longer available. It
has been suddenly deleted, without warning by Atmel.
AVR assistance from JED
If you are interested in using AVR processors for any project, small or large ... email or call Ed Schoell at eschoel@jedmicro.com.au with your comments or questions. (03 9762 3588)
JED offers a design service for boards
or systems based on AVR, Xilinx gate arrays and a range of other electronic
hardware and software projects. We have a group of standard circuit and
gate array design modules, with matching software drivers developed during
our time creating the Little Blue Computer and friends and we have designed
a number of custom systems based on AVR using this experience.
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(Updated Nov22nd 2008)