What Should i do?

Houdini · Post by **Houdini** » Tue Nov 29, 2005 6:31 pm

Ok so everything is build and ready for a finished product, only problem is that the 7805 regulator sticks up really high on the board, and affects the ability to fit in my case. Any suggestions of what i should do or what you did to bypass this on your portables if you have completed one?
THanks!!!!

SNESguy · Post by **SNESguy** » Tue Nov 29, 2005 6:43 pm

Just relocate the 7805 somewhere else where you can attach a heatsink.

timmeh87 · Post by **timmeh87** » Tue Nov 29, 2005 6:59 pm

cant you just bend it over?

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 7:06 pm

yeah but you need a heatsink
i would say just desolder it and relocate it heck its only 3 wires

Kurt_ · Post by **Kurt_** » Tue Nov 29, 2005 7:59 pm

An idea I had goes something like this:

Move the 7805 to near your batteries, and hook up a heat sink there.
(I think) batteries work better warm. I heard that somewhere. It would make sense, chemical reactions are slower when it's colder.

So you set up a heat sink under or around the batteries. Recycling energy.

Then, you can play in the winter!
---------------------------------------------------------

As Tim just informed me, you don't need the 7805 regulator if you're running around 7v.

I'm taking it out for my portable, once I get another SNES to fry...

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 8:03 pm

wha, for a snesp you need some type of voltage regulator the snes takes 5 volts so if you take the regulator out and input 7 goodbye snes

Kurt_ · Post by **Kurt_** » Tue Nov 29, 2005 8:05 pm

The snes takes 5 eh?.......

So if I put only 4 1.2v batteries as opposed to 6 in series without a regulator it would run, right? Without a regulator, I mean.

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 8:08 pm

yup 4 Ni-MHs would work i would check the batteries voltage though

Kurt_ · Post by **Kurt_** » Tue Nov 29, 2005 8:13 pm

That's cool. If I can fit 12 in (like I was planning to do in the fried SNESp)
then that means i'll get a good 7800 mAh. That's enough to play it for like 7-8 hours (Or so I think, I've never actually built anything yet.)

Sorry for staelnig your topic Houdini.

So if you're using AA's, just take the 7805 out, solder the two end holes together, and strap 4 batteries in series to the power supply. Voila.

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 8:16 pm

yeah you can just jump the input and output wholes with a small wire but make sure you dont have any solder bridging ground and the other wholes

Kurt_ · Post by **Kurt_** » Tue Nov 29, 2005 8:19 pm

Turbo, Tim (ocne again) informed me of something. Voltage drop. When it goes below 5v, it'll drop out right? Not enough power.

So with 4 1.2v batteries, that's already under by a bit. Perhaps 5.... meh.

I just want another SNES....wahhhh....hey! WHERES THE CRYING EMOTICON!!!! :'(

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 8:33 pm

it depends but if you have your batteries fully chargee it shouldnt be an issue i think triton is running his off 4 batteries and he said that the snes can run off a little lower than 5

daguuy · Post by **daguuy** » Tue Nov 29, 2005 9:24 pm

4 1.2v AAs works. if you need a higher voltage for the screen and use a 7.2-9v battery, i'd suggest getting a 5v switching regulator (more efficient than linear regulator like 7805) free from the dc-dc convertor thread in the N64 forum. it say's 9v but the 3.3v ones also do and they can run on 7.2v so i assume 5v ones do too.

timmeh87 · Post by **timmeh87** » Tue Nov 29, 2005 9:36 pm

yeah the nimhs have a pretty level discharge curve.

http://www.uniross.com/images_industria ... e-nimh.gif

depending on what voltage the snes drops out at youd only be using 75% - 80% of your batteries though...

for interest's sake, heres nimh compared to nicd:

link

and this is what li-ion looks like:

http://www.uniross.com/images_industria ... -liion.gif

you can see how nimh is relatively flat. you wouldnt get away with using any other type of battery unregulated...

so now you know

Please make it so the text for links dont go over that far ot the size. Thank you - Sparkfist

Kurt_ · Post by **Kurt_** » Wed Nov 30, 2005 6:06 pm

timmeh87 wrote:yeah the nimhs have a pretty level discharge curve.

http://www.uniross.com/images_industria ... e-nimh.gif

depending on what voltage the snes drops out at youd only be using 75% - 80% of your batteries though...

for interest's sake, heres nimh compared to nicd:

link

and this is what li-ion looks like:

http://www.uniross.com/images_industria ... -liion.gif

you can see how nimh is relatively flat. you wouldnt get away with using any other type of battery unregulated...

so now you know

Please make it so the text for links dont go over that far ot the size. Thank you - Sparkfist

sorry sparkfist, but my resolution is 1360x1024 and i didnt realize some people had screens that small

for some straaaange reason this got posted under kurt. oh well.