Using the LM1881 Chip

This is quite a nice chip, and has myriad uses, but we only need it to perform one function here. Since most game systems output the composite sync information along with the NTSC video output, and since most RGB monitors will not accept this extraneous info along with the sync, we need to remove the video signal. The LM1881 does an admirable job of this. It's a dead easy circuit - one small chip, two small capacitors and a small resistor. As the below pic shows, it's small enough to wedge into a DB-9 hood. The total cost for these parts is about $5.

[LM1881 Circuit Diagram]
(Click to enlarge)

[DB-9 Connector]
[DB-9 Hood W/Cover Removed]
[Top View]
This pic shows the female DB-9 hood which will plug into any of my modified game systems. When the cover is removed, you can see that there is a lot of crap wedged in there. It's not as hard as you might think, as this next pic shows. This pic shows an overview of the internals of the hood. Not really as scary as it looks!

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