Question about US Night Vision Ultra PVS-7B Goggles

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I HAVE NO CAM CODER OR DIGI CAM. BUT I WANT TO MAKE A NIGHT VISION CAM OR GOGGLES . PLEASE HELP ME OUT.

Posted by Lohith Arcot on

  • Richard Morris
    Richard Morris Aug 05, 2011

    You have NV devise AT PVS7? What is it that you really seeking here---you have cam coder--or--digi cam---but want to make a night vision cam--or goggles. What is it , please help me.stewbison

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Richard Morris

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Lets get it right  here.  You don't have a camcorder or digital camera, right!  Then you want to make a night visison camera or goggles   I will tell what you need but you'll need  lots knowledge and know how pertain to electronic, hight voltage, optic lens, and some how getting parts that will be required.

1st. Image intensifier tube, 18mm or 25mm, Generation 1, 2, 2+,3,3+ iit.  You'll need to read up on thes image tubes.  Hint:   Their is electronical engineering in Sweden that built very thing that required for a NV devise....google it.

2nd. ccfl inverter with step transformer.  ccfl invert-cold cathode fluroscent Lamp, inverter electronic switch to turn off the DC voltage  (off/on @ 60hz/sec) or more.  Just with what I have said here.  I could write 200 page on it, and this isn't all of it.

3rd. Need small toloid (sp) coil, or transformer that will step up the Vcc voltage (battery volts) to something in hundreds/thousand volts.

4th. Toloid coil/transformer  take ccfl inverter voltage and multiply it to the operating voltage, frequency, and current the iit (image intensifier tube needs)  Example; 3 battery volt ----ccfl inverter

(where voltage switched off/on (about 3.8 dc volts here with capacitor switch)----- two primary winding (this switch the phase of the two dc voltage, it also has the dc current lage behing the dc voltage by 90 degrees)   Now the primary induces voltage into the secondary windings which is a step winding to about 500V to 1700V  THEN

Voltage multiplier (uses cremiac capacitory HV caps, then diodes (HV)  and they are hook up in a way that look like rome tower-cross hatch pattern---here, there are many different ways to get voltage multiplier, 1/2 wave, full wave,etc.  Now ever two capacitors and three diodes are consider one stage or cascade.  Each stage will double the previous voltage.   Example:  starting with 2000DCV switching to first stage 4000DCV to second stage 8000DCV to third stage 16000DCV to fourth stage equalls 32000DCV.

 

In this world under conservation of engery; nothing is destroyed or greaded, just engery transfer from one state to another.  Example:  If one could look down the wire from the image tube plate to the end of the battery---one would see resistance/  In the EEEE world it called impendence.  This impendence is made up of wire,capactance, resistances, component resistance everything will contribute to the overall impendence.  Remember the current lag the voltage by 90  degrees.  Simply this lag plays little joke on the impedence--for a short moment in time it makes it look like no current source and before it can reconized it, it off, the process starts all over.  simplist as I can get.

 

 

Posted on Aug 03, 2011

  • Richard Morris
    Richard Morris Aug 05, 2011

    Lohith, what is it that you need? Do you have AN PVS7 B night vision goggles? I would really like to help you out. Please clarify you questions. stewbison

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