ChipMusic.org - Flash cart drawing too much current on Pocket?

Re: Flash cart drawing too much current on Pocket?

2013-12-30T18:24:23Z

Heh, that's a cool way of getting around the problem. I've done lots of experiments with the Pocket, but in none of them did I attempt to just limit the current going to the backlight. Instead, I usually focused on trying to increase the current the Pocket could provide. The limiting factor in these things seems to be that normal alkaline AAA batteries just can't provide much current before the voltage "droops." My solution was a small lithium polymer battery mod.

Re: Flash cart drawing too much current on Pocket?

2013-12-29T17:04:38Z

Very nice! Unfortunately it's an experiment every time. But at least it always works! Your batteries should last much longer now too.

Re: Flash cart drawing too much current on Pocket?

2013-12-29T04:50:17Z

Ah, thank you guys! I ran a quick search, but I guess i wasn't looking for the right things... Thanks again!

EDIT: Yep, just tossed one in, and it worked like a charm! I used a variable resistor so i could 'calibrate'.. Seemed like 113Ω was the magic number..

Re: Flash cart drawing too much current on Pocket?

2013-12-29T03:45:14Z

thursdaycustoms wrote:

The issue is that your backlight is draining too much power. You need to add a resistor to the backlight to bring the brightness down and therefor draw less power. I have to do this with every Pocket that I backlight. I would recommend somewhere between 100ohms and 220ohms depending on the color of your backlight.
But as an experiment you can try desoldering the backlight altogether and try running LSDJ again. This will tell you without a doubt if your backlight is drawing too much power. I would recommend starting at 150ohms and then seeing which way you need to go from there.

Re: Flash cart drawing too much current on Pocket?

2013-12-29T01:51:34Z

You have to let us know which flash cart you are using.

Re: Flash cart drawing too much current on Pocket?

2013-12-29T01:27:08Z

I seem to remember this exact topic being discussed and a fix explained in the last few weeks. i think it is lsdj going into power save mode or something. No time to look right now, but you can do a search.

Re: Flash cart drawing too much current on Pocket?

2013-12-29T01:23:38Z

Probably worth mentioning the Game Boy has a ASM 4x backlight, as well as Pitchmod installed...

Flash cart drawing too much current on Pocket?

2013-12-29T01:19:10Z

Hey guys,

I was playing around with a pocket a had worked on a while ago, and ran into this weird issue.. It seem like when I attempt to play anything in LSDJ the backlight goes dim? (Check the gif below for a better idea of whats happening)

I tried the cart (which has always been buggy) on a DMG and couldn't replicate the problem..

Anyone else run into this? or anything similar?