Post by thread:propeller clock update

>I've made some changes to allow the use of old disk drive motors in the >propeller clock, check it out if you're interested: > >http://www.bobblick.com/bob/projects/mclock.html > >-bob Hi Bob, Fantastic idea, I wonder if any one with a helicopter would consider putting (ultra-high brigth) LEDs on the edges of the blade and flying over the city at night ?? Or even on the leading edge of a bi-plane - now that would be interesting calculating the on time against air velocity ? Incidentally your pictures of the Tandon motor etc are great - very clear and readable on Netscape 3.0, I'm considering getting a digital camera - what camera or scanner input did you use ? Rgds Mike Socrates once gave the advice to "by all means get married... If you get a good wife you will become happy, if you get a bad one you will become a philosopher." Become an Engineer and avoid making this problematic decision.

Thus spake Mike (spam_OUTerazmusTakeThisOuTWANTREE.COM.AU): > Fantastic idea, I wonder if any one with a helicopter would consider putting > (ultra-high brigth) LEDs on the edges of the blade and flying over the > city at night ?? I doubt it - unless they had a death wish. But there is a skywriting outfit in California that uses several planes in formation (line abreast, I think) and the smoke generators on each plane are turned off and on under computer control so that they fly across and draw raster type letters, rather than the stroked letters conventional skywriting produces. -- Clyde Smith-Stubbs | HI-TECH Software, | Voice: +61 7 3354 2411 .....clydeKILLspam@spam@htsoft.com | P.O. Box 103, Alderley, | Fax: +61 7 3354 2422 http://www.htsoft.com | QLD, 4051, AUSTRALIA. | --------------------------------------------------------------------------- Download a FREE beta version of our new ANSI C compiler for the PIC microcontroller! Point your WWW browser at http://www.htsoft.com/

Mike , > > Fantastic idea, Let me add my congradulations as well. > I wonder if any one with a helicopter would > consider putting (ultra-high brigth) LEDs on the edges of > the blade and flying over the city at night ?? Or even on > the leading edge of a bi-plane - now that would > be interesting calculating the on time against air > velocity ? It might be even more interesting just trying to sort out the areo-dynamics and load changes. Something as simple as two 18" strips of masking tape on the leading edge of the wing roots of a J3 (cruise speed about 65MPH) had a sigificant effect on the airplane. I have seen a couple of variations on the moving LED scheme which are interesting. 1) The exploratorium in San Francisco has a interesting variation to the moving LED's . It is fixed leds and when you move your head you see a pattern. 2) A few years ago Mike Gore who works at Byte Craft built a LED display that turned on when you waved it through the air it had a sping loaded pendulum with two contacts that made contact only when it was accellerated. It could determine the direction of the accelleration and then spell out a word forward or backwards. It uses a NMOS 6805 that should tell you how old it is. The code was written in C and should work on PIC's with minimum changes. If anyone wants a copy send me a direct email. Walter Banks http://www.bytecraft.com

Hi anyone been to Madlab. They started at the Edinburgh Science Festival and now do world tours. They have many PIC projects including "The Spaceflag". This is seven leds on portb of a 54 with an ir tx, rx and 2 switches on porta. You wave it about and it displays messages which you program with the switches. Unfortunally you don't get the PIC code. I use the circuit to do simple light effects by chasing along the leds etc - spaceflag gets boring after a few years!!! I seem to remember seeing it in New Scientist once too. Have a look at the madlab pages on http://www.madlab.org A pic section is comming soon. Tim At 09:01 26/01/97 -0500, you wrote: {Quote hidden}>I have seen a couple of variations on the moving LED scheme which >are interesting. > >1) The exploratorium in San Francisco has a interesting variation >to the moving LED's . It is fixed leds and when you move your head >you see a pattern. > >2) A few years ago Mike Gore who works at Byte Craft built a >LED display that turned on when you waved it through the air >it had a sping loaded pendulum with two contacts >that made contact only when it was accellerated. It could >determine the direction of the accelleration and then spell >out a word forward or backwards. It uses a NMOS 6805 that >should tell you how old it is. > >The code was written in C and should work on PIC's with minimum >changes. If anyone wants a copy send me a direct email. > >Walter Banks >http://www.bytecraft.com > ------------------------------------------------------------------ If you can read this, it is the end of the message! My web pages are at http://web.ukonline.co.uk/members/tim.kerby/ My PIC site is at web.ukonline.co.uk/members/tim.kerby/pic/ It needs your projects! ------------------------------------------------------------------