AncientBrit wrote:Harry,
For the slits in the card do you make just a single cut and rely on the gap opening when you curve the card?
If so, how consistent is the slot width from top to bottom when assembled?
Keep up the good work, excellent instruction course as others have already said.
Kind regards,
Graham
Hi Graham
Yes its sort of like that for the slanted slits after you make the cut even flat the cut is fine enough for the light but it does spread a little as you are thinking as its wrapped inside the dvd drum lid ...
As you saw in the passed post i made one like that for the little drum but i have not used it for this test because of light loss having 2 very fine slits ...so i went back on my word and did it the old way for 2 reasons ...
First most if not all plastic drums have are tapered ,the small drum is 2 or 3mm from one end to the other so..if i use the paper slits partly cut into the paper and wrap it inside or out side of the drum theres a gap at one end ...not so bad or important for the large drum but i need space with a diffuser, thats the second reason i need it close as to the drum for room between it and the luxeons .
I cut out my paper 2.4cm wide 8cm high pasted these to the inside of the small drum as it tapers up theres a slight v to the line after all the paper slits are made i use another smaller thiner cut out rectangle of paper paste these from where the small bottom line starts and keep it that width and that fixes the tapering problem ....i sort of kept this drum slit width 2 or 3 times the size of the large drums for no other reason but for increase light level ,i think i could make it thiner for testing later on from doing the same from the out side of the drum ....just to see its limits .
The good thing about having the paper glued to the drum tight i can now do the same for the diffuser via a hot glue gun ..and that worked
i can just still see the 9 leds when bright so i might try another layer of that plastic .
Thanks Graham i know its all nice to make something and show it working with a nice picture but i think it helps no one else really you have to see it evolve..mistakes and all ,i'm ok with a red face from time to time if it helps ,i know i fail too but trying is the point of all this.
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.