We have 2 TV's with DVD players built in, one is 18 mths old, t'other is prolly 7 years old.
In the last few months both have refused to play DVD's, both show 'Invalid Disk' on the screen.
These are kosher DVD's which used to play OK.
Can you do anything about this? Is there a DVD machine cleaner like the old VHS machine cleaner tapes?
Nearby lightning strikes. All that energy now stored in the DVD drives. Be very careful...
very careful...
You may jest, but when I was at school I made a Wimshurst machine using a pair of contra-rotating 78s You should have seen the sparks fly from that baby.
Hi Graham
When I was at *primary* school (say, 1970, 71) there was a 'childrens' book in the school library with just this project. I was entranced... it was just around the time I was getting into making crystal set radios and other electronic stuff (others will remember, I'm sure, those Philips electronics kits, and the superior 'Radionics' kits of the time).
I would *love* to track down the book that had the Wimshurst machine project in it. I know there are other designs available, especially in these days of t'interweb, and one day I *ill* make my own Wimshurst machine - but that particular book has a strong nostalgic value to me. If you, or anyone else, could give me any pointers to help me find it I'd be well chuffed.
From memory it was roughly 'quarto' size (around 8" by 5"), was mostly orange or red on the front cover, probably with a drawing of one or two of the projects, and was of UK origin. It might have been called something like 'static electricity projects ...' or something. It was a long time ago... Around the same time I was also borrowing an American book from the school library which included projects like 'how to make a foxhole radio', using lead from a pencil and a blue razor blade as a detector.
Ah, electronics was always a better hobby than a profession...
J^n
In message , The Medway Handyman writes
Always a problem with a combination like this
You can buy a DVD with a tuft of brush on it which cleans the lens
£1.60 from CPC, I've just bought one [1][1] - well nicked one from one of my employees who ordered two
email me at snipped-for-privacy@cetltd.com, I'll look up the part no tomorrow
In message , brass monkey writes
"Only £6.99" !!
In message , Graham. writes
I didn't know that Sparks made a 78
"This spark ain't big enough for the both of us"
Groan! ;)
I certainly made a pencil lead and razor blade radio, I may have originally got the idea from the same book, but I am pretty sure it was something I wanted to try from a remembered idea, rather than following something I had in print at the time.
Bargain.
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