2 quick questions

RNS0504 · Post by **RNS0504** » Wed Sep 22, 2004 7:56 pm

Sorry if this is up here already... anyways, here goes

1 I been eyeing these batteries at radioshack, you know the 7.2 v 3000 mah ones? Im 99% sure it would work because the n64 uses a 7805, but still, is that a good choise of battery for the n64?

2 how would i knock that down to ~2.8-3.7v volts. I was thinking a voltage regulator, but i am not sure.

3. (yes, i know i said 2 ?'s) How would one go about charging those batteries without buying the charger? As i am too cheap to buy it.

Thanks in advance!

JackFrost22 · Post by **JackFrost22** » Wed Sep 22, 2004 8:14 pm

1. yes they are good batteries
2.A diode would work well
3.You could build one just apply 7.2 volts and about 500 Mah

RNS0504 · Post by **RNS0504** » Wed Sep 22, 2004 8:22 pm

Ok, thanks

(YAY! FIFTY POSTIES!)

Post by **SpongeBuell** » Wed Sep 22, 2004 8:27 pm

JackFrost22 wrote:2.A diode would work well

I may be missing a few uses for diodes, but don't they just make electricity go in one way? Sure, everything including the best wire has resistence, but not that much. Or maybe you need to add a few things to that diode

s3ptic · Post by **s3ptic** » Wed Sep 22, 2004 10:19 pm

I may be missing a few uses for diodes, but don't they just make electricity go in one way? Sure, everything including the best wire has resistence, but not that much. Or maybe you need to add a few things to that diode

I was thinking the same thing. I think somewhere I heard a diod would drop like .2 volts, but this seems like it would be far too little to get the 7.2 volts down to ~2.8-3.7v. Even if you managed to get the voltage down this way it still probally wouldn't be nearlly as efficiant as using a regulator. But I am probally missing something as I am pretty bad with electronics.

stereth · Post by **stereth** » Thu Sep 23, 2004 2:24 am

Silicon diodes drop the voltage in series by about 0.7V. They heat up according to that voltage and the current you run through them. It's a cheap way to drop the voltage a little, but the output voltage still varies as the battery dies. If you can afford the voltage drop, it's a nice insurance policy against hooking the battery up backwards. Regulators/converters are still a better bet to keep your output voltage constant.

Try Ebay for batteries. For the $35 you'd pay for one 3000mAh battery at Radio Shack, I got two of them and a charger.

For your 3.3V supply, what about 3 rechargeable AAs? Maybe even a couple sets of 3 in series for longer life. Dropping 7.2V to ~3V wastes a lot of power, especially since the N64 draws so much at that voltage.

RNS0504 · Post by **RNS0504** » Thu Oct 21, 2004 5:38 pm

OK, ive bean really, Really, REALLY lazy with my n64p recently, and havent got much done, but heres the new. I cut the board down to 5.5"x4.75" (sorry people who use cm, the only ruler within 1 foot of me was inches) I will not have a 3-4 controller port. There is no possibility for an ecyernal controller because i dont wanna wire another switch(it will cost me a whole $1.89 us!) It uses a 4"psone screen that i got used from EB for $24US. I may rewire the cart slot. And i have to cut down the ext slot if i want it all to fit in the pencil box that i want to use.(hint hint) The screen will be flip up. I may do the rgb mod as the screen i have takes in RGB. More later with pics(if i feel like it)