Step 15: Add the Video Amp

What you need:
2N4401 Amplifying Transistor
33ohm Resistor (Orange-Orange-Black-Gold)
220ohm Resistor (Red-Red-Brown-Gold)
Soldering Iron

The RF box did more than just turn the composite to RF. It also amplified the video signal. When we took it off, the video signal became weak. We need to build a small video amp to boost the signal.
The second picture explains it all.

Solder one end of the 33ohm resistor to the emitter of the transistor.

Solder the 220ohm resistor to the other end of the 33ohm resistor. That point is your video out. We will connect that to the screen later.

The amp is finished. Clip the leads on the transistor, then solder the base of the transistor to the weak video signal, and the collector to 5v.

All this may sound a little confusing, but pictures 2 and 3 explain it all. Picture 4 has the schematic, if you prefer.

I soldered the resistor leads very close to the transistor, but you may not wish to do this. If you heat the transistor up too much, then it won't work anymore. Feel free to make the circuit on a small piece of perfboard.
I'm having a problem with video amp. It outputs video but it's really poor quality (mainly lacking colours). If someone knows what might cause this it would be a great help. <br><br>Also, if someone needs assistance with something i can try my best to help.
For someone having the same problem, i fixed this by making it exactly like in this tutorial. I first had the video amp on a separate perfboard and i guess that's what caused some interference or something. Making the amp on NES directly was a good thing.
<p>do u need anything else</p>
Two things this is the best thing ever and can you make a Atari 2600 portable
<p>Where would the Wondermega M2 classify at?</p><p>(if you don't know what that is, it's a Sega Megadrive and Mega CD in one)</p>
Can you make xbox360 handheld joseph.odawkins87@gmail.com
<p>how would i use this battery </p><p>http://www.ebay.com/itm/12V-3000mAh-Lithium-ion-Super-Rechargeable-Battery-Pack-AC-Charger-2368-EU-Plug-/291274047616?hash=item43d1494080:g:0FEAAOSw8cNUR4J1</p>
<p><a href="http://www.amazon.com/gp/product/B00OB0S8KE?keywords=5%20Inch%20LCD%20Screen&qid=1444222488&ref_=sr_1_13&sr=8-13" rel="nofollow">http://www.amazon.com/gp/product/B00OB0S8KE?keywords=5%20Inch%20LCD%20Screen&amp;qid=1444222488&amp;ref_=sr_1_13&amp;sr=8-13</a></p><p>will this screen work?</p>
<p>it is cool</p>
<p>I'm sorry if you have already mentioned this but can you tell me what device your battery is from?</p>
<p>If you're looking for a slightly cheaper screen, I'd recommend this: <br></p><p><a href="https://www.adafruit.com/products/947" rel="nofollow">https://www.adafruit.com/products/947</a></p><p>It was meant for the Raspberry Pi, but it would work great for this project!</p><p></p>
<p>If you're looking for a slightly cheaper screen, I'd recommend this: </p><p><a href="https://www.adafruit.com/products/947" rel="nofollow">https://www.adafruit.com/products/947</a></p><p>It was meant for the Raspberry Pi, but it would work great for this project!</p>
<p>Do you have any idea if this would work with a gamecube controller? </p>
<p>I have a question...</p><p>Online I've seen many portables (mainly from GManModz on YouTube) and I've been wondering. This instructable covers making the circuit board flatter okay however what if you want to make it smaller? Because that portable is Huge! and I've seen other portable that are way smallers. (Darth64, GC-Lynx to name a few) so could you please help me?</p>
That gameboy is cool ! <br>you wont sell it?? <br>
<p>You mean <strong>NES</strong>, right?</p>
Would this work as a screen?<br> <br> <a href="http://www.amazon.com/Monitor-Support-Resolution-Automobile-Rear-view/dp/B006MPRFJQ/ref=sr_1_2?s=electronics&ie=UTF8&qid=1378561162&sr=1-2&keywords=lcd+monitor+composite+input" rel="nofollow">http://www.amazon.com/Monitor-Support-Resolution-Automobile-Rear-view/dp/B006MPRFJQ/ref=sr_1_2?s=electronics&amp;ie=UTF8&amp;qid=1378561162&amp;sr=1-2&amp;keywords=lcd+monitor+composite+input</a>
<p>Yes it would. I used a very similar screen on mine and it worked just fine.</p>
<p>Hey, i am trying to make one, but i can't figure out how i would connect an AA bettery pack up to the n64, could i solder it to the AC wire???, do i take out the AC connecter and just solder the leads to the AA straight to where the AC connecter? </p>
<p>If I just wanted to attach the PSOne screen to my NES, is the wiring pretty much the same? To use the PSOne screen's audio and video I mean? And would the NES's original RCA jacks still be usable? Thanks in advance!</p>
I think u should enter the gaming contest 1up
Awesome! Thanks for the help!
hi, I'm preparing to make a portable system but my knowledge of electronics isn't very comprehensive. I have a question about batteries. if the system I want to make portable has a hiher voltage than my batteries will it work? or do my batteries have to have a voltage equal to or greater than what it is trying to power as long as I build a corresponding regulator?
I love this instructable, it is going to be very helpful when i make my own. I was wondering, would there be an easy way to add a battery life indicator so i know when the battery is about to die?
Where can i buy a case for creating such a device and also a screen?
I tried to do this to my nes and the whole 4th pin popped out and my nes doesnt turn on anymore! Can you help please? Ps. Sorry for my bad english.
superb <br>it worked for me <br>
I understand everything having to do with Av cables and other things like that but I have trouble understanding batteries. I would like to use conventional batteries and I only care about performance. The thing is whenever I look up tutorials people bring up regulators and stuff I don't understand. I don't even know how to power the console with batteries. You said nothing about where to plug the batteries in pr where the cables would go. I took apart my game cube and now it doesn't work and I didn't even change anything inside it. I am worried to take apart my new and overheat it like my game cube. Please reply and thanks for this thread thing because I understand little more about batteries now.
define what you mean by &quot;remove the wires&quot; pull them out of their thing or what?
wow! nice job! awesome!
I can't really tell from the pictures, so I wanted to ask - how can you make sure that the new cartridge port is installed the correct way? Does the cartridge only go one way into the port, and that's how you know which way to solder it on? <br> <br>Thanks for the great instructable! I'm not planning on making a portable soon, but I just happened upon a couple of NES boards without cases, and was thinking about making cases for them, and putting a standard cartridge port out the back instead of messing with the finicky ZIF socket.. Your information on where to get the ports is very helpful. <br> <br>Also, could you let me know where the wires from the power and reset buttons on the case go to the blue connector on the NES motherboard? I don't have a case to check, and I'll be needing to add my own power and reset buttons. <br>
my nes died. cpu gets hot fast and blue screen when powered on. i have replaced the connector. anything else i can do? <br>also i reverse engineered a portable dvd player lcd to work without the dvd player control circutry and it now takes composite. 7 inch diagonal screen
This step seems a bit vague, what piece of equipment will I need to use these batteries with the system?
Would a orig. ds screen work
Definately not, it needs av in, ruling out most screens like that.
So if I was using a DVD player.. How would I achieve the connection.. Doesn't the NES take AV Input? At least mine worked when i used a Red yellow white cable...
perhaps you could use right angle brackets to hold a piece of acrylic perpendicular to the shell to support the came cartridge?
another fantastic idea! ive made a few xbox 360 laptops but ive over looked making them completely handheld. i might actually try it but without a doubt it would take a lot of time. great how to!
This is the most AWESOME instructable that i've ever seen. <br>The detailed explanation is a great bonus. <br>Excelent work!
how do you do that with an original xbox?
From what I have read on forums, a handheld would be EXTREMELY hard because it i big and there isn't much that can be removed. However, an xbox laptop wouldn't be out of the question, but still challenging.
or an xbox 360?
or an xbox 360?
I see you have overscan issues with the screen just like me. My PSOne screen is hooked to my model 2 Sega Genesis through direct RGB. No resistors or capacitors. I get a clean signal surprisingly but the screen is shifted a bit off center and has borders all the way round. Any ideas on how to fix it or am I SOL? <br> <br>It also has some garbage showing up in bottom border area but that is from a factory glitch in the Genesis hardware and thus unsolvable unless I start replacing chips.
will this work http://www.onlybatteries.com/showitem.asp?ItemID=11559.47&amp;cat1=20&amp;uid=1096&amp;utm_source=shopzilla&amp;utm_medium=versafeed&amp;utm_term=11559&amp;utm_content=hitech&amp;utm_campaign=rechargeable+replacement+batteries+11+510+200&amp;sid=shopzilla-com
does the voltage matter?
I will be making a portable gamecube. i was trying to find some Li-Ion Batteries for my portable, and, this being my first portable, i had no idea what to get. could you give me some things ( if there are any :P ) to look for in a battery? <br>
also, if it helps, both the 'cube and the 4.3 inch widescreen takes 12 volts.

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