gary wrote:Hi Harry, I am not entirely sure what you are reporting here but just a few thoughts:
Sorry gary i was hooking up the little monitor part to my pc to test it ...i have a simpler circuit running it just really have brightness control only so some nbtv test cards work others not ,i just get a dark screen but can see its there but to dark to see any thing perhaps not enough amplification to drive that luxeon on some ...but anyway i also found the ones i can see don't look great trying to look at it larger,like i can see the baird test card but when i try to look at it larger detail is lost.
I am going to hook it up to one of my other monitors circuit that i know works ok to see.
1) Aperture size - well yes but you knew to begin with that those holes are too large (for the camera as well don't forget) - you need the sizes I have listed previously.
Yes thats why i tried now making tiny hole nipkow...but hole size i can only work this out by eye and my needle drill ,unless i can find one of those drill bits you had to do this more to a standard procedure .
I more than likely need to direct that light to a smaller area
2) I would have thought a 1 watt luxeon should be more than enough light - I had nowhere near that much light and I got acceptable pictures - sure, pictures this small will be dimmer than a larger one - but they are still very much viewable especially in low light conditions.
Its the luxeon circuit i am using i think and alsol i have swapped Laptops my other one must have a better sound output than this one as i noticed a large drop to this one...kids knocked it off my table bad part was the sound plug was in it at the time and its broken plug inside and i nad no sound out put till i get brave enough to pull it to bits to look.
But looks like i still have a bit of work on this side of it .
3) I can't quite work out why you keep saying having the monitor will help you with the camera speed - won't the input to the monitor circuitry be from the camera?
I mean it will help me get the camera to the right speed to output to record...i have not seen a monitor camera together like this run from start up to 750rpm so i am not sure what it will look like apart from it would be no syncing problems at the correct speed...i just wanted the monitor to see this part and adjust and stop any roll best i can to out put the camera signal.
That won't help with the speed as they are always in synch regardless of the speed of the disk.
This i was expecting but i think i am right in saying you will get a locked image half or correct or double the 750rpm speed ? again i am not sure what it looks like between these speeds same as looking at any nbtv signal till you get a picture at the correct speed gary ?
If it's NOT from the camera and you are going to pump an external video source to it to bring it up to speed then you don't need the additional 16 apertures and you don't need synch holes just use a printed encoder pasted on the disk encoder.
I haven't got around to this part yet i recall you saying just paste the print out on the disk for the sync signal outputting part...i have seen that disk on the forum post a while back ,i have it on my other laptop that had the nasty accident .
This may allow the camera apertures to come out to the edge of the disk if you had synch holes there - the closer to the edge of the disk the larger the apertures can be.
The two other nipkows are larger closer to the edge i suppose you use as much space as you got for size with these things.
4) Disks this size are problematical, mostly in terms of accuracy, but you can do it - having said that, for your first camera, a whopping BIG disk would have been a better choice