• This web page was last updated on Mon, 16 Jun 08 at 1259 hours

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Data Logging - There are three pieces in the data logging puzzle, the first is the sensor and its associated programming to produce a piece of data. The second and third pieces are an accurate time base and a way to record or log the data. These last two will be addressed here. While these solutions were selected or designed with Freeduino/Arduino(r) based hardware in mind, they work equally well with any processor supporting I2C in software, firmware or hardware, including, but certainly not limited to PICs, Parallax Basic Stamps family and Propeller, RevEd PICAXE, and so on.

ETT DS1307 Board - ETT, a Thai firm, offers a series of "Mini-Boards" of various types and purposes. The Real Time Clock board is a great value. It has a DS1307 RTC chip with Lithium Battery backup all on a top quality board, fully assembled.

Wulfden I2C MemStamp board - This board is a simple postage stamp sized board that holds a single 24LCxxx or 24AAxxx series serial EEPROM chip. It will take any chip in the series up to and including the 24LC512/24AA512 which holds 512K bits (64Kbytes). The chip is addressed at $50 (address 0) and has a three position jumper for he Write protect line;

• Write Enabled - WP to Vss (jumper to left)
• Write Protected - WP to Vdd (jumper to right)
• External Control - WP to board pin 2 (jumper in center)

The I2C MemStamp comes as a basic kit, pcb, 8 pin 3M socket, headers and jumper. It can also be purchased with 256 Kbit (32KB) or 512 Kbit (64KB) serial EEPROM chips

Wulfden DataLogger - take a DS1307 Mini-Board, two I2C MemStamps with a total capacity of 128KB, and throw in four positions of scaling resistor sets hooked to available analog ports and you have the Wulfden DataLogger. The Wulfden Datalogger was design specifically to plug directly into a Modern Devices BBB (Wulfden Freeduino Kit) or an Arduino(R) NG or Diecimilia Board. One of the pin lheader layouts is sufficicently generic that it can readily interfaced to any procoessor with I2C support.

The Wulfden DataLogger Basic Kit comes everything but the memory chips

• DS1307 chip
• 32KHz watch crystal
• 3 3M 8 pin DIP sockets
• new Maxel CR2032 battery and holder
• 2 4.7K pullup resistors
• complete assortment of connecting headers
• 8 1% precision resistors for analog voltage scaling. The following values supplied produce these scales to 0-5 volts
  • 10K/10K for 0-10 volts
  • 10K/4.53K for 0 to 16.03 volts
  • 10K/4.53K for 0 to 16.03 volts
  • 22.6K/4.53K for 0 to 29.94 volts
• for other ranges you will have to supply your own
• the serial EEPROM chips are addressed as $50 and $51 (addresses 0 and 1)
• Assembly and use is straight forward. Schematics. manual, and sample code coming soon.
• serial EEPROM chips are not part of the basic kit. We stock 24LC256 (32KB) and 24LC512 (64KB) chips and can supply them

CUSTOMER EMAIL ADDRESSES - when you place an order with us here at Wulfden you need to supply us with a real email address for an account that is checked daily. Increasingly we get orders from dummy email addresses that are used just for PayPal and rarely/never checked. Thus, when something is not clear in an order and I attempt to remedy the situation I get no answers. I take no responsbility for your order beyond the face value of the PayPal order under these circumstances. A number of you have cute little traps set requiring secondary response to get mail through to your address. I do not play that game! Make <brianbr@wulfden.org> able to pass your trap.

ORDER CONFIRMATION - Your PayPal receipt is your order receipt confirmation. Please consult the Shipping Status List (last updated on Sat, 05 Jul 08 at 1119 hours) your order status as pending, packed and/or has been shipped.

All shipping is by US Postal Service. When you have finished selecting your order, see the chart below and locate your the best description of your order and click on the proper shipping surcharge

Shipping Surcharges
Destination	Order Value	Mail Service Description	Surcharge
U.S.A.	under $50	1st Class Mail	none
U.S.A.	under $50	Priority Mail	$5.00
U.S.A.	over $50	Priority Mail	none
U.S.A.	over $100	Priority Mail Insured	$5.00
Canada	under $50	1st Class Mail Air Mail	none
Canada	under $50	1st Class Mail Air Mail - Priority Registered - Insured	$15.00
Canada	over $50	1st Class Mail Air Mail - Priority Registered - Insured	$15.00
all other countries	under $50	1st Class Mail Air Mail	$5.00
all other countries	under $50	1st Class Mail Air Mail - Priority Registered - Insured	$18.00
all other countries	over $50	1st Class Mail Air Mail - Priority Registered - Insured	$18.00

Prices below are displayed in this format [ $4 + $2 ] The number in red is the price of the item(s) and the number in black is the Shipping and Handling charges added to the item price

PayPal orders are generally sent within a day. You may order by mail with a Postal Money Order or a personal check; they must be made out in "US Funds." Orders paid by check will be held five days after receipt. Make checks or money orders out and send to:

Brian Riley
PO Box 188
Underhill Center, VT 05490

ETT DS1307 Real Time Clock Mini-Board	A battery backed up Real Time Clock board made by ETT in Thailand. It is based the Dallas Semiconductor DS1307 chip and communicates via I2C. Code is readily available for Arduino, Propeller, PICAXE and Basic Stamp. Comes completely assembled with lithium backup battery and ready to go. The schematic for the board and the datasheet for the DS1307 are available. This product, like several others, is stocked as a convenience to customers and will be sold only in small quantities and only as part of an order for Freeduino, PICAXE, or Propeller products.			Qty = 1 $8 + $2
Wulfden I2C MemStamp Basic Kit	Basic MemStamp Kit - board, socket, headers and jumper, NO chip!	Qty = 1 $2.50 + $2	Qty = 3 $6 + $2	Qty = 5 $9 + $2
Wulfden I2C MemStamp Kit w/32KB	MemStamp Kit with 24LC256 chip, board, socket, headers and jumper	Qty = 1 $4 + $2	Qty = 3 $10 + $2	Qty = 5 $16 + $2
Wulfden I2C MemStamp Kit w/64KB	MemStamp Kit with 24LC512 chip, board, socket, headers and jumper	Qty = 1 $5.50 + $2	Qty = 3 $15 + $2	Qty = 5 $23 + $2
Wulfden DataLogger Basic Kit	Basic Wulfden DataLogger Kit - board, socket, headers and jumper, NO EEPROM chips!	Qty = 1 $14 + $2	Qty = 3 $39 + $4	Qty = 5 $60 + $5
Wulfden DataLogger Kit w/64KB	Wulfden DataLogger Kit with 2-24LC256 chips, board, socket, headers and jumper	Qty = 1 $17 + $2	Qty = 3 $48 + $4	Qty = 5 $75 + $5
Wulfden DataLogger Kit w/128KB	Wulfden DataLogger Kit with 2-24LC512 chips, board, socket, headers and jumper	Qty = 1 $20 + $2	Qty = 3 $57 + $4	Qty = 5 $90 + $5