I'm a fpv beginner, my quadcopter only has on board camera, and lately I have been looking around for a DVR to record the video feed, to find my lost quadcopter, to check my errors, etc.

I've seen a lot of people on YouTube using an easycap, a 5.8 Ghz receiver, and smartphone with OTG support, to record the flight.

For the android there is a great app called easycap viewer (https://play.google.com/store/apps/details?id=com....) which allow you to display a video feed on the smartphone screen, but it doesn't record yet.


New very cool app now on the market:


They are developing that. For now you also need to capture the screen with AZ screen recorder. This method is not that great but at least you a record (even not so good) of the flight. One of my first experiences:

[Play Video]

The video has the image very small and a lot of black border, something is missing me....

UPDATE: Resolution problem solved. It's necessary to force the AZ Screen Recorder to use orientation Landscape, otherwise it will be like the previous video. The video with the resolution problem solved , but with a new one on the VTx, which is not important for this instructable:

[Play Video]

At first, I tried the setup successfully but, I end up with lots of wires: video cable, power, the OTG cable, etc. Not practical! Lots of wires and steps for a single flight.

So I've decided to integrate a video receiver into the easycap. Now I only need the OTG cable, even the receiver is powered by the smartphone, really handy a usefull in the field.

Checkout how I did it.

Step 1: Disclaimer

This easycap mod will require to solder some wires to power the module receiver from the USB plug, this might damage your smartphone if you do things wrong!

The easycap viewer only works on android devices with OTG support, which means a smartphone or table that allows you to connect USB devices. Search for more info on google.

Even if your device has OTG might not work properly with this application.

I'm not responsible for any injury or device damage. Do it at your own risk!

Step 2: Materials & Tools

First of all your smartphone must have OTG support google for that.

Easycap UTV007
A boscam receiver module 5808..
• A rp-sma female L PCB connector or a RP-SMA extenstion (see last cahpter)
A OTG cable
• Some zip ties

• Soldering Iron
• knife
• x-acto
• Hot glue gun

Step 3: Disassembling Easycap

The plastic case is easily removed:

1. User your nail to separate the 2 pieces of plastic
2. Remove the RCA cable micro jst plug from the PCB

Step 4: Prepare the Video Cable

The goal is to eliminate the RCA plugs, and reuse the PCB connector with enough wire to solder the video in 1 and audio in 1 to the video in an audio in pins of the RX5808.

1. The cable is composed by several cables, one for each input. They are joined by a rubber cable brake which must be cutted-off
2. Remove the isolation of each of the single cables. Don't forget to take a picture or note down which is what, i.e., video in 1 audio in 1,etc
3. I've completly removed the inputs from the connector which I'm sure I'll not use it again. Only leave the 1st video in and the 1st audio in
4. Join the sinal grounds (white wires) and solder them together

You should end up with something like similar with this:

Step 5: Discover and Solder Power Wires to the USB Plug of Easycap

Connect the PCB to a USB port and check which pin is the 5V and ground.

Solder a red wire to the 5V pin and black wire to the ground.

Check the picture.

Step 6: Connect the RX5808 to Antenna, Power and Signal Sources

Solder the rp-sma to the RX5808. this sould be the most difficult step

1. Start by sand a little bit the shield (metal part) of the RX5508 to the solder stick easier.
2. Align the RP-SMA connector and solder the 2 upper pins of the connector to the shield
3. solder the 2 ground pins from the receiver to the connector
4. finally solder the antennae signal to the correct pin

Solder the wires (UPDATED with new pictures):

1. • Join the signal grounds (white wires) and solder to the ground pin near the video pin (more rightwards red wire).
2. • Solder the video wire to the video pin (more rightwards red wire)

3. • Solder audio in wire to the 6,5M pin (more leftwards pin)
4. • solder power ground (from the USB) to the gnd pin near 5v pin of the RX5808

5. • Solder the 5v wire (from the USB) to the 5v pin of the RX5808

Step 7: Cut the The Back of the Plastic Chassis

The cap you must customize/cut is the one which doesn't have the led hole.

Use a X-acto knife and try to cut between the holes.

Try to fit tyte the receiver in order to the cap.

Step 8: Assemble the Easycap Again

Between the receiver and easycap PCB use 2 pieces of double sided tape to avoid the electronics to touch one another. Just leave a space to glue the wires which pass from the front to the back.

Since the the pen will be a a litle bit fat you may have to use some zip ties to secure it well.

Test it! It should work with no problems

Step 9: Some Improvements I Would Made

Instead of using a RP-SMA PCB L connector I would use the female part of extension cable (not L shaped) which will fill the gap leaved by the cable break, with some hot glue.

May be I would install a dip switch to choose the channel. For now I'm using always the default for this chip which is 5705 Ghz.

Step 10: Update 2017 - 3D Printed Custom Cover Case

With original case the electronics become a little tight.

In attachment to this step there 2 files for printing a cool custom cover case to this USB FPV stick.

This cover was gently provided by MichelleS380. Check out Michelle's Blog:


Thank you Michelle!

<p>Hi,</p><p>Great project, well written up and worth building.</p><p>I made one and tested it against the LaserBGC module.</p><p>The latency was the around the same 9 to 13 ms for both.</p><p>The picture was very different, the LaserBGC was what is normally referred to as cleaner (moving towards out of focus to remove some distortion) and the Home Made one was sharper (allowing the distortion to come through whilst starting to look a little distorted). Somewhere in the middle would be better.</p><p>To remove some distortion I removed the C1 decoupling capacitor from the RX5808 circuit. Research on the net states this is a very old idea and was designed to protect the circuit from DC currents, while reducing the image quality. Broadcasting systems use very large capacitors so as not to loose so much quality, clearly I don't want to double the size on the project so just removed it totally. The RX5808 does not need this decoupling anyway.</p><p>I'm just building a servo driven lens that will allow remote focus and zoom functions on my drone. I'll see how good this is then in the real world then.</p><p>Thanks, keep up the good work!</p><p>The </p>
<p>Hi MichelleS380</p><p>Uau! Thanks a lot for your feedback and work to research further. </p><p>Can you tell me which capacitor is the C1 in the RX5808, I would like to try.</p><p> I see you have a great 3d printer cap for this mod. Do you want to share it with us? I can update this instructable to include it, may be a reference to your thingiverse.com account.</p><p>Hope to see soon an instructable with your zoom lens project, it seams very interesting.</p><p>Thank you again and best Regards</p>
<p>Hi jnora,</p><p>C1 relates to the official RX5808 circuit diagram, as attached. I think you wired direct anyway so you get the best signal already. I'm guessing the smooth capacitor (C2) could also go, the USB supply should be very smooth anyway.</p><p>I've attached some STL files for the case, made with Fusion 360 so they can be edited for free under student or hobby licence. Also I have attached the project board diagram I used.</p><p>I've been messing with camera's and lenses today. This project is now better than the LaserBGC marketed design. I've decided the LaserBGC is too blurred now. I have another project that needs to be able to zoom in and read small text. The LaserBGC cannot do this, the video is just smoothed too much that small text ends up as a blur. Using your combination the text is not perfect but readable.</p><p>Fingers crossed the STL files will upload, I'm not sure what restrictions they have on here - feel free to add these to your project.</p><p>Re the Zoom Lens, it works a treat. Search for Bionicbone over on RCGroups. The write up and STL's files will be put up on my blog over there.</p>
<p>Thanks a lot for your contribution Michelle, I've added the your STL files to the additional step 10.</p><p>Regards</p>
<p>Hi jnora,</p><p>Thanks for adding the extra bits.</p><p>I tried the module in the real world recording FPV but the signal was poor at distance. In comparison the signal back to my skyzone googles which has diversity is fantastic.</p><p>So, that got me to thinking, why not combine this solution with a RX5808 diversity solution.</p><p>I think I found just the project so I have ordered the bits required and wil;l compare the difference between single antenna solution and dual antenna solution.</p><p>When complete I'll come back here and post the results along with the new vero board design etc.</p>
Yes perfect<br><br>thx
<p>Hi,</p><p>I baught a Adapter like yours with an easycab, OTG ans a eachine VRX. </p><p>But they didn't connect the Audio Wire, and I really would like to use it as an Spectatormonitor with Sound. So PLEASE PLEASE could you help me? </p><p>I can't find some shematics from the connector, so could you tell me witch Pin I should use for the Audio Signal? </p>
Hi RoyT1,<br><br>Just to be clear, because I didn't understand the question (sorry):<br><br> You want to know the pinout of the easycap connector?<br><br>or <br><br>You want to know which pin is audio out in that VRX? Please provide me the link, if it is this the question<br><br>Regards
pinout of the easycap :-) <br><br><br>Regards<br>Roy
<p>Hi Roy,</p><p>Check out the step 4, I've added an additional picture. Hope it helps</p><p>Regards</p>
<p>Hi, I hope you can help, I did everything in the guide however the video is just blue. How would I know that my racer (eachine 250 racer) is sending to the same channel as the boscam? Also, just to confirm the video is the yellow rca cable?</p>
<p>Thank you very much for this extremely useful mod for FPV (my passion also). I wonder if you can push things further by finding a way to power everything from an external (Lipo maybe) source, since the smartphone battery is consuming so fast with three devices to power in the same time.</p>
<p>hi pchitonu,</p><p>As my phone h&aacute;s 3300ma battery, it is enought to record some flights. Anyway know that battery is drained quickly.</p><p>The easiest way is buying a powered otg cable:</p><p><a href="http://www.banggood.com/Micro-USB-Host-OTG-Cable-With-USB-Power-For-Samsung-Galaxy-Note-i9220-p-933270.html" rel="nofollow">http://www.banggood.com/Micro-USB-Host-OTG-Cable-W...</a></p><p>And use a powerbank:</p><p><a href="http://www.banggood.com/Original-XIAOMI-5_1V-2_1A-10000mAh-Power-Bank-For-Smartphone-p-977406.html?p=IW200611042902015015" rel="nofollow">http://www.banggood.com/Original-XIAOMI-5_1V-2_1A-...</a></p><p>Best regards and have fun </p>
<p>could you put more detail in step 4 ?</p><p>just confused on what wires to leave</p>
I have just added some more pictures. If it is not enough just tell me. Thank you for your comment.
hi, this looks like a great idea, I have just received all my part and about to start soldering. would you be able to put up some extra picture of the wires conected to the rx5808? it would really help. <br><br>Cheers<br><br>Sam
<p>Hi Sam and FD, thank you for your comments.</p><p>I've updated the step 6 with some more pictures with details about connections. Hope it helps.</p>
Interesting :) I just got my easycap in the mail and will try to connect it to the fatshark receiver in the goggles. If that doesn't work I will follow your instructions. Good work!

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More by jnora:Easycap With 5.8Ghz Integrated Receiver for FPV for Less Than 20$ 4 Paper Clip  Smartphone Car Holder Legocopter  
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