yeah, me too. that's not what's cold though....

 

Nice. What chips did you use for your controller circuit? What frequency are your PWM'ing them? Got a schematic?

 

Very neat stuff.

I can see the local news now MAN ERUPTS INTO FLAMES!!! While riding a harley.

 

vanman59
Very nice post looks like you have put a lot of time and energy in to this project..I already have some Gerbing gloves,and a jacket liner but may try to make some pants.. Thanks for the post

 

Thanks for the link..

 

Kinda low-tech, but it looks warm.

 

here is the board.

http://store.qkits.com/moreinfo.cfm?Product_ID=MX033

I think I attached the parts list. If not copy and paste this mess into an excel spreadsheet.

PARTS LIST
ITEM Part # WHERE TO BUY PRICE QTY REQUIRED SUBTOTAL
PWM DC Motor Speed Control Module MX033 http://store.qkits.com/moreinfo.cfm/MX033 $19.95 2 $39.90
Speed Control Modules Case FB04 http://store.qkits.com/moreinfo.cfm/MX033 $4.46 1 $4.46
Relay and socket ??? Pull - A - Part $2.00 1 $2.00
Wire for motorcycle AWG 12 already had mine, don't know how many feet $0.00
various connectors and splices ??? already had mine $0.00
5 Position Terminal Strip ??? already had mine $0.00
1.0 ohm 10W 10% Wirewound Resistor (2-Pack) N/A Radio Shack $1.99 1 $1.99
Project Enclosure (4x2x1") 270-1802 Radio Shack $2.69 1 $2.69
AWG 30 Teflon Coated Wire approx 50 ft. E Bay $7.50 1 $7.50
various Addel clamps ??? already had mine $0.00
Various nuts, screws and washers ??? already had mine $0.00
In line Phono Jack 4 pack 274-337 Radio Shack $3.99 1 $3.99
In line Phono Plug 4 pack 274-321 Radio Shack $3.99 1 $3.99
Small pieces of velcro ??? already had mine $0.00
Hoppy 2 Pole Flat Connector 47965 Advance Auto $1.99 3 $5.97
Plug Housing (ACC Connector) 72114-94BK Dealer $4.50 1 $4.50
Plug Lock (ACC Connector) 72114-94BK Dealer $0.70 1 $0.70
Wire Terminals-pins (ACC Connector) 72191-94 Dealer $0.60 4 $2.40
Seal (ACC Connector) 72195-94 Dealer $0.45 1 $0.45
Vest where ever got mine at a thrift store $3.50 1 $3.50
glove inserts already had mine
Connector for the Potentiometer box already had mine

$84.04

 

I wonder if the heaters we use in astronomy would be adaptable to this. Kendrick makes a heater control unit, that can control temp on 4 devices. We use them for heater strips (dew heaters) on telescopes to prevent dew. They work off of 12 volts and usually out in the field with just a power pack (12ah battery). "Dew-not" straps use a thick film instead of a resistance wire.
Got my wheels turning, Hmmmmm...



Joe

 

put simply my ***...if you were a rocket scientist maybe.
What will I have to do to make one with
Enough BTU's
To heat a BUT
The size of a TUB!

 

This:
http://www.instructables.com/id/DIY-heated-clothing/