Add on fan to Lilliput -- Power ?? where ?? - Page 2

ddogg_777 · 06-01-2005, 10:27 AM

Sweet Mox, let me know what you find, I've pondered this too.

66miles99 · 06-01-2005, 11:32 PM

Isn't this thread for the sound in VGA mode codes you were speaking of...just my .02

http://www.mp3car.com/vbulletin/lcd-display/50258-lilliput-programming-guide-more-reset-codes.html

vairu · 10-10-2005, 12:08 PM

Awesome info! I'll probably do this one day just to make me feel better that the screen will run a little cooler. Where can i get a fan like that? Do regular stores sell ones that small? (Best Buy, Circuit City, etc.) Thanks

super-fly · 04-08-2008, 10:52 PM

has anyone tried hooking up the fan to the speaker output with any success

HiJackZX1 · 04-10-2008, 01:58 AM

I know this thread is super old, but I got 3 Lilliputs also and Im thinking of doing this also. I had 2 fans blowing air in, but the screen still seemed to get hot, so now Im going to go head and remove the speaker and draw air out....

Quote: Originally Posted by ddogg_777

No. Fans actually heat up the air as it passes through the blades. You always want the fan to suck so that the hot air from the blades is exhausted. The only reason you would want a fan to blow on something if it was wet. Evaporation comsumes a lot of energy, thus cooling whatever is wet. This is why you sweat and you feel cool when a fan blows on you. However, electrical components don't sweat.
BTW, I was actually gonna do this to my Lilly too. Thanks for the pics Don!

Does this also apply to PC cases? I was thinking of having a large fan blow air in, and other fans blowing air out. Should I reverse it and have the large fan draw the air out and the 2 smaller fans on the sides blow in?

phuz · 04-10-2008, 06:47 AM

Quote: Originally Posted by Don 944 LA

well, I did solder the leads onto the board where the power comes in. At first I thought that I fried it, so I undid it, then it still wouldn't turn on.....

Turns out that the ribbon cables weren't " Just Right "... so I finally got it to work again...... and MAN IS IT COOL.. Literally....

I have 2 other lilliputs that I will do this to. I just wish that I had done it before the Touchscreens got out of whack.

Also, I have the fan blowing out so that it draws air into the thin slots around the outer side of the case....

I would recomend this to everyone !!!!! total cost $10 for small 12v fan.

(hint) make sure circuit board has clearance before hot glue dries

and WHY would you recommend this?

Does the Lilliput need cooling?
I have the 889GL and have the LCD out of its housing and mounted to a dash adapter. I didn't really think it needed an external cooling source.

HiJackZX1 · 04-10-2008, 10:45 AM

Quote: Originally Posted by phuz

and WHY would you recommend this?

Does the Lilliput need cooling?
I have the 889GL and have the LCD out of its housing and mounted to a dash adapter. I didn't really think it needed an external cooling source.

It all depends on the Lilliput you have and how the lighting is being produced. The LED versions of course do not need this, but for CCFL units that are inclosed in a tight space, need this mod. Mine start to over heat after about 3 minutes.... Im hoping that doing this mod will help out alot.

phuz · 04-10-2008, 11:57 AM

Quote: Originally Posted by HiJackZX1

It all depends on the Lilliput you have and how the lighting is being produced. The LED versions of course do not need this, but for CCFL units that are inclosed in a tight space, need this mod. Mine start to over heat after about 3 minutes.... Im hoping that doing this mod will help out alot.

how is this determined?
I honestly have no idea what the 889GL uses.

visenri · 04-10-2008, 04:00 PM

Quote: Originally Posted by super-fly

has anyone tried hooking up the fan to the speaker output with any success

If the amplifier is a TDA7052A/AT you should be able to supply 0.2V to the audio input to get almost 12V at the output with enough power to drive a fan (Gain is 35dB at max vol, 55 times input voltaje). You can take out audio input capacitor or just leave it and don't connect audio input.

The problem is audio volume control is logaritmic, this is a must for audio, but it's not good for fan control. You will have big voltage steps, depending on how much steps has lilliput volume control.