Project SGP-1 *UPDATE 3/13/10*

[paul4990]

Looking brilliant so far, where did you get your batteries?

[thewizdawg]

I got the batteries from batteryspace about 8 months ago. I don't think they sell these anymore.

The screen is the one LOB recommended from this thread.

http://forums.benheck.com/viewtopic.php ... 52#p388252" onclick="window.open(this.href);return false;

[thewizdawg]

Well it rained pretty much all day today in OH and what's the best thing to do on a rainy day? OK, what's the 2nd? Play video games of course. The 3rd? Mod stuff. So that's what I did. I'm 99% finished with Project SGP-1. I just want to add a reset button.

Here's some quick pics I took. Better pictures tomorrow. Youtube video will follow later in the week

Cartridge slot re-wired.


Running Mega Turrican, one of favorite video games.
The thing to the left of the speaker grill is the volume dial. I made up a dirty LM386 amp for audio and it's working pretty good.


Size comparison with the Nomad. I like mine better.

[Bino Gas]

Looks great! The name of your portable reminds me of Stargate.

What happened to your blog? I enjoyed reading your NESp Delight progress but now it's gone.

[thewizdawg]

More pics



LM386 amp




The voltage regulator is the 5V (DE-SW050) by Dimension Engineering. They are about 15 min from where I live so I just went over there and bought a couple. The portable cuts off when the batteries are around 6.45 V. The datasheet for SW050 says min Vin is Vout+1.3V. So they are .15 V wrong.

The electrical tape probably wasn't needed but I was afraid the back of screen would contact the system board.

Case secured by 4 screws

[Frizo]

Major casework finished. Here's a few pics taken with my Iphone.

iPhone buddies!

Anyway, pretty nice!
Love the case, looks nice.
Not in the first pic, but after the painting, looks perfect!

[Bionicomander]

so cool.

[sam_thornley]

Nice job, Very professional. I like it!

[thewizdawg]

This weekend I finally had the time to finish this guy up. I added a reset button and a low battery led.

The low battery circuit I used can be found here: http://www.iroquois.free-online.co.uk/lithled.htm" onclick="window.open(this.href);return false;

I got the IC from a really cool place on the east side of Cleveland OH called Electronic Surplus (http://www.electronicsurplus.com" onclick="window.open(this.href);return false;). The part cost $9 bucks, so it's not cheap. But if you are looking for an easy to implement low battery solution I recommend this.

I changed the resistor values from 680K to 800K(330K+470K in series) and from 150K to 168K(18K+150K in series). The led starts to light up around 6.9V. The unit shuts off when the batteries are around ~6.55V (seems to vary a little). This gives me about 10-15 min of play time.

I was able to do some real world tests and the batteries lasted 4 hrs. No bad IMHO!

Youtube video will be posted soon... I hope.

[c_mon]

This is simply awesome. Could you provide us LM386 audio amp schematics? That'd be appreciated...

[brunoip]

This is simply awesome. Could you provide us LM386 audio amp schematics? That'd be appreciated...

I think in the datasheet is the schematics that he used, but I am waiting for the answer too.

[leonexodio]

what Sega genesis did u use i like your portable

[Life of Brian]

How on earth did I not see this portable before now? I just completely missed it. It's awesome!