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Forums
4hv.org :: Forums :: General Chatting
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Coronafix
Thu Aug 28 2008, 02:25AM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Does the 8watts include running that little fan?
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Avalanche
Thu Aug 28 2008, 12:00PM
Avalanche Registered Member #103 Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
Found a way to make identical holes in BC337s smile

This was a unipolar stepper motor driver, it was running fine... as the speed decreased, suddenly got a rhythmic "pop, pop, pop, pop" as the transistors failed one by one in their attempt to switch tongue


1219924815 103 FT6000 Poppoppoppop
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Ken M.
Fri Aug 29 2008, 12:03AM
Ken M. Registered Member #618 Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Are you sure it wasn't a peice of silicone traveling at ultra sonic speed ripping threw eaach transistor? Niffty none the less.

BTW Nik if your interested, Ebay has a few 20watt led stars, with driver and it claims to put out 1000lumens *note: a standard flashlight with a krypton bulb puts out around 65lumens* and the price for one of those led stars....$44 and 25 shipping, theres also 3watt bulbs and theyre pretty bright... got some for my maglite.
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uzzors2k
Fri Aug 29 2008, 12:47PM
uzzors2k Registered Member #95 Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Avalanche wrote ...

as the speed decreased, suddenly got a rhythmic "pop, pop, pop, pop" as the transistors failed one by one in their attempt to switch tongue
Hilarious. cheesey
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Mads Barnkob
Fri Aug 29 2008, 04:53PM
Mads Barnkob Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Pictures of some butterfly caterpillars and a spider carrying its eggpouch.
1220028823 1403 FT6000 125 2541

1220028823 1403 FT6000 125 2547
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Daniel Uhrenholt
Fri Aug 29 2008, 07:19PM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Hi all,

It’s been a while since my last post, I’ve been busy with my new job as a technician at Aalborg University, under the Department of Electronic Systems. This means that I make the mechanical parts for robots, satellites etc.


1220037441 125 FT6000 Img 0774


This is my latest project at Aalborg University, it’s a small robot made out of a vacuum cleaner. This project is done with a lector, for advertising the department in the public.

Cheers, Daniel
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Steve Conner
Fri Aug 29 2008, 09:14PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Cool! Will you call him Nilfisk to save having a new nameplate made? smile
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Myke
Sat Aug 30 2008, 02:39AM
Myke Registered Member #540 Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
I made a small joule thief with the parts I had on hand.


2809354015 E9e481550a B


Also a small camera inverter circuit lighting a neon.


2815034982 72bb1448e3 B
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Daniel Uhrenholt
Sat Aug 30 2008, 05:56AM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Hi Steve,

The nameplate stays as it is:-)

It still needs some programming, but I hope it will be running within a week. I don’t do the programming of the microcontrollers yet, but I’ve been promised a programming course in the nearest future:-)

Cheers, Daniel
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Kizmo
Mon Sept 01 2008, 05:27AM
Kizmo Registered Member #599 Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
I hase a pipe...


1220246808 599 FT6000 Putkilo


...2000x400x9 polypropylene pipe shades
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