Keepin' It Cool

For those of you who weld, do you ever get over heated? Would you not want a helmet that could cool you down?  This helmet is programmed to use a simple fan from radioshack and a temperature sensor from parallax to cool you down. The fan kicks on by itself to blow a cool breeze.

For the helmet you will need:

- 2 9v Batteries
- 1 9V snap connecter
- 1 12VDC Brushless Fan
- 2  220 ohms risitors
- Screw Driver Phillips head
- 8 Screws (23.73mm)L (2.71mm)W
- 8 nuts (6.24mm)
- 5 foot of 22 gage wire (60 inches)
- Paralax LM34 Temperature Sensor
- Paralax bread Board with minicontroller
- Paralax Basic Stamp program installed on computer
- Wielding Helment
- An Analog to digital transfer
- Power Drill
- 3/32 Drill bit
- 1 self leading wood drill bit 2⅛ = 54mm
- Velcro
- Solder gun
- Solder wire
- 1 Roll of electrical tape
- Parallax  Analog  to Digital converter

- Visit parallax.com, search for LM34 Temperature Sensor  
- Buy a 3 inch 12VDC Cooling Fan from Radio Shack
- Parts may take a week to come in.

-  Download the basic stamp software on to your computer
-  It can be found at http://www.parallax.com/tabid/441/Default.aspx
- Download software according to which Operating system you have on your computer.

- On the Front of helmet, Drill holes according to fan. The fan will have pre-drilled holes for mounting. Use the 3/32 drill bit to drill
- Also cut a vent hole with a 2⅛ self leading bit, for fan to get circulation.

- Take screws, mount fan on inside of helmet so the fan can blow on your face.
- Once screws are in, secure the screw with a nut, so they remain in place.

- Cut holes in one side of you helmet to keep your board in place.
- Cut the holes according the size of your board

- Solder 1 foot of 22 gage wire to each prong on the LM34 temperature sensor
- Then solder the wires of the snap connecter to a foot of 22 gage wire
- Wrap the connection with electrical tape

- Take screws, mount the board on inside of helmet on the left side.
- Once screws are in, secure the screw with a nut, so they remain in place.

-          To wire everything together, use the following pg. 183 PDF file: 
http://www.scribd.com/doc/35753337/44/ACTIVITY-1-TESTING-THE-LM34

-The PDF file will give you a diagram of the wiring needed for the use of the analog to digital transfer.

-Plug senors supply into the VDD slot
-Plug the ground into VSS
-Plug the output into pin8

-For further help us the PDF file http://www.scribd.com/doc/35753337/44/ACTIVITY-1-TESTING-THE-LM34 use the diagram of the senor at the top of page 183 to help

' {$STAMP BS2}
' {$PBASIC 2.5}

DigDataIn VAR Bit
ADC_DataIn VAR Byte
temp CON 255

 

LED PIN 0
DigIn PIN 8
ADC_CS PIN 13
ADC_Clk PIN 14
ADC_Dout PIN 15

OUTPUT LED
PAUSE 1000

DO
GOSUB ReadData
GOSUB PlotData
PAUSE 20
GOSUB run
PAUSE 500
LOOP

ReadData:
LOW ADC_CS
DigDataIn = DigIn
SHIFTIN ADC_Dout, ADC_Clk, MSBPOST, [ADC_DataIn\9]
HIGH ADC_CS
RETURN

PlotData:
DEBUG IBIN DigDataIn, CR
DEBUG "[", DEC ADC_DataIn, ",*,.0196]",CR
RETURN

run:
IF (DigDataIn > temp) THEN
HIGH 0
PAUSE 20
ENDIF
RETURN

- Tape or glue all wires to the inside of the helmet so that nothing disrupts your vision.

-Have fun, be safe, and stay COOL :)