The FIC

Bibin · Post by **Bibin** » Tue May 27, 2008 7:07 pm

Want!

Website · Post by **Life of Brian** » Tue May 27, 2008 7:22 pm

Sweet smokin' sassafras! It lives! Nicely done.

Post by **Sparkfist** » Wed May 28, 2008 6:03 am

That's really cool. I'd love to see more photos, and really what you've been using for power.

Rekarp · Post by **Rekarp** » Tue Jun 03, 2008 2:30 pm

Well I gave up on the single AA battery. The energy loss from converting 1.2V to 5V was at about 60%-50% which is unacceptable. I ordered a 3.7V lithium battery that is 750mAH. Should give about 1.5hours of game time at full volume. Charge time will be 1 hour.

Oh and it has a name now. The FIC or Flashback In a Cart

Rekarp · Post by **Rekarp** » Tue Jul 08, 2008 12:09 pm

Got the battery and it works great under the lithium battery. Total power draw is 250mA which is about half of what most portables I have built draw. with a 750mAh battery and 93% efficiency (Ti switching regulator!) the total time of game play should be 3+ hours of game play

lovablechevy · Post by **lovablechevy** » Tue Jul 08, 2008 1:48 pm

Rekarp wrote:Got the battery and it works great under the lithium battery. Total power draw is 250mA which is about half of what most portables I have built draw. with a 750mAh battery and 93% efficiency (Ti switching regulator!) the total time of game play should be 3+ hours of game play

awesome!

so, i'm curious. what switching regulator did you use? and i thought switching regulators were only for stepping down voltages... not boosting them up...?

Website · Post by **Life of Brian** » Tue Jul 08, 2008 2:35 pm

Yes - details, pictures, etc. please!

Rekarp · Post by **Rekarp** » Tue Jul 08, 2008 3:30 pm

lovablechevy wrote:
Rekarp wrote:Got the battery and it works great under the lithium battery. Total power draw is 250mA which is about half of what most portables I have built draw. with a 750mAh battery and 93% efficiency (Ti switching regulator!) the total time of game play should be 3+ hours of game play
awesome!

so, i'm curious. what switching regulator did you use? and i thought switching regulators were only for stepping down voltages... not boosting them up...?

I am going to use a step down as I am going from 3.7V to 3.3V. I am going to use a PTH04000W.

Yes - details, pictures, etc. please!

In due time.

lovablechevy · Post by **lovablechevy** » Tue Jul 08, 2008 3:33 pm

Rekarp wrote:I am going to use a step down as I am going from 3.7V to 3.3V. I am going to use a PTH04000W.

how in the world do you get everything to run off of 3.3v...?

Rekarp · Post by **Rekarp** » Tue Jul 08, 2008 4:19 pm

lovablechevy wrote:
Rekarp wrote:I am going to use a step down as I am going from 3.7V to 3.3V. I am going to use a PTH04000W.
how in the world do you get everything to run off of 3.3v...?

The Flash back first steps down the 9V input to 5V with a 7805 and then it steps that down to 3.3V with another linear voltage regulator. The AEIcomp screen runs off of any voltage from 3.3V to 12V. The Audio Amp is a normal LM386 that to my surprise can operate on 3.3V which is below the 5V spec.

Rekarp · Post by **Rekarp** » Sun Aug 24, 2008 3:26 pm

This project went from back burner to start over. The Flash back wen poof. Back to the drawing board.

atarihacker · Post by **atarihacker** » Sun Aug 24, 2008 3:32 pm

thats ashame
it was really looking great

Bibin · Post by **Bibin** » Sun Aug 24, 2008 8:51 pm

Rekarp wrote:This project went from back burner to start over. The Flash back wen poof. Back to the drawing board.

Are you using built-in games or carts? I thought I had broken mine entirely when I accidentally zapped the flash rom, but then I wired up a cart slot and found that it otherwise worked perfectly.

Rekarp · Post by **Rekarp** » Sun Aug 24, 2008 8:52 pm

Bibin wrote:
Rekarp wrote:This project went from back burner to start over. The Flash back wen poof. Back to the drawing board.
Are you using built-in games or carts? I thought I had broken mine entirely when I accidentally zapped the flash rom, but then I wired up a cart slot and found that it otherwise worked perfectly.

Yes On board. There is no room for a cart slot