mafiaracers

iTrader: (22)

ProudSavageOwnr>>> i'm not making fabric....I'm taking actual "virgin" i guess...carbon fiber fabric that hasn't been impregnated with resin or epoxy and doing that process myself. I'm building up carbon fiber fabric layers to make it thick like a TC chassis so I can make my own stuff. I'm trying to get 3.5 millimeter thickness. If i have any leftover "fabric" yes i'd be happy to send you some.free....but, if you want "plate" then....you'll have to wait until I'm done making it then we'll talk.

lates...

b3buggy

Hi Jam-ehz, Try getting some arctic cooling CPU thermal epoxy if you want small quantities. JB Weld will also work quite well & is cheap. Although sometimes difficult to work with. Epoxy on its own seems to work very well as long as the epoxy is applied correctly there should be no problems. I do have a cooler that is screwed down for quick change prototyping.
Attached some more pics of my uber development unit & a smaller totally aluminium unit made for a friend.

Ross

ProudSavageOwnr

so i think ur saying u got some carbon fibre cloth or sumthing and your epoxying it together to make a stiff sheet?

and if you do succeed i will be happy to buy some from you its it is good and totally flat.....i dont need much probably just a 10'' by 10'' inch peice or maybe smaller

is that a pencil sharpener in the 1st pik or some kind of fan thing.........and how the hell do you guys get frost? i only get water? wtf?

b3buggy

Its a fan! shaped like a turbine. Looking at your previous pic. The heatsink looks far to small . Remember its a heat pump and can only drop the temeprature a certain amount, the cooler the hot side of the peltier the cooler the cold side gets ! Try using a larger heatsink and a copper cold side clamp. This should get frost. Also the dew point comes into play.also sometimes frost cannot be achieved if its very hot or even windy. HTH

Ross

Jam-ehz

iTrader: (6)

I'm actually planning to get two peltier plates, one will cool the other, giving it the max possible cooling capacity for the bottom plate.. on the other side I have a 7200RPM fan mounted on a huge AMD heatsink.. cools one plate well enough, can't wait to see two

Yeah, the arctic stuff I'm starting to see now.. gonna have to check it out.

AEDave

I built my owm motor dyno



theres a full article on how it works here

http://uk.geocities.com/dave_pickett...ew_page_17.htm

howard1

Here's my contribution. This is a constant current discharger capable of discharging up to 40 amps. The cutoff voltage is also adjustable. Since this picture I have also added a voltmeter. The two fans are there to cool the large heatsink.[IMG]pict082.jpg[/IMG]

ProudSavageOwnr

hmm ill give a bigger heatsink a try......but how come the MM coolers have a small tiny heatsink n still product frost? is it the peltire im using? its only like a 40 something watt

Drewdc90

iTrader: (3)

The Much more doesn't get frost on it, the coldest they get is around 10 degrees C.

mafiaracers

iTrader: (22)

That's what I want to do...take cloth and make it stiff sheet...i'll keep you posted on my progress

b3buggy

The MM units will and do get frost on them, although after sometime of being on. It will depend on the dew point, ambient temperature and environment. They have a relatively small heatsink (which does get hot, unlike mine ) but have a high speed fan ,something like 10k rpm .

The best thig is to keep the hot side as cool as possible as previosily said. Using a larger heatsink is the easiest Also use a good quality cold side material for your clamp , aluminium is good, copper is better.
Have you any more pics of you unit?
I would have thought 40w is adequate enough. The most I use is a 72w unit. HTH


Ross

XrayFK

iTrader: (1)

Silver is the best for cold But $$$

b3buggy

Yep, but like you say expensive.
Try Pure diamond something lile 5 times better at themally conducting than silver $$$$$$$$$

TEM

In another post I asked

"When they say 30amp pulse discharge for IB3800/4200's, what is the waveform and frequency thats best for the cells? I want to design my own pulse+linear discharger. Seems easy enough considering I don't need to see the numbers (I only trust my T35's). The trinity unit seems affordable but doesn't pulse per cell."

40views in 1 day but no replies. Does anyone in this DIY thread know the answer to this one?

builthatch

iTrader: (1)

i also am severly interested in this type of info. in another thread, i asked-

"I use a Trinity D-90 for my IB4200's, but i want to cycle my IB750 AAA's that i use for my mini-z and the products that are out there, such as the PN Racing discharger board are of inconsistent quality and function.

I have a nice digi multimeter and some ability. I know there has to be something in writing on how to use maybe some bulbs, resistors, diodes, a pot and some breadboard to make a nice discharger.

Is there anything out there that i can make that would have a 1amp discharge rate and cutoff at .9 or .7 volts, individually? I'd like to do 4 cells at once time, but bring each down individually to the cutoff voltage.

thanks!"