Silicon Chip

  • Thread starter iiiiiiiiiiiiiiiiiiii
  • Start date
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iiiiiiiiiiiiiiiiiiii

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Hi, it seems i've missed last months silicon chip with the hand powered
leds, anyone want to rent/sell/copy me the article or can I get it online ?
Thanks,
Steve.
 
Try Jaycar (Fyshwick), sometime they have unsold copy there.

Or order past copy article from Silicon Chip @
http://www.siliconchip.com.au/

"iiiiiiiiiiiiiiiiiiii" <test@bigpond.com.com> wrote in message
news:L0v0c.106$IH5.6212@news.optus.net.au...
Hi, it seems i've missed last months silicon chip with the hand powered
leds, anyone want to rent/sell/copy me the article or can I get it online
?
Thanks,
Steve.
Click to expand...
 
iiiiiiiiiiiiiiiiiiii wrote:

Hi, it seems i've missed last months silicon chip with the hand powered
leds, anyone want to rent/sell/copy me the article or can I get it online ?
Click to expand...
There's not much to it. A hand crank connected directly to a stepper motor
shaft, and either a half, or full wave bridge rectifier, with as much
capacitance as can fit in the case, directly connected to the led. No current
limiting resistors were used.

You'll need to experiment with the handle shaft length to make it
comfortable, (there is no gearing).
There was some talk about using supercaps, but they recommended good quality
supercaps (from farnell) as the el-cheapo supercaps had nothing "super" about them.

The 1W luxeon led design was the same, but they said you NEED to use a full
wave bridge instead of a half wave. Again, no current limiting resistors were
used.

--
Linux Registered User # 302622 <http://counter.li.org>
 
Thank you both !

"John Tserkezis" <jt@techniciansyndrome.org.invalid> wrote in message
news:4042ffa7$0$28870$afc38c87@news.optusnet.com.au...
iiiiiiiiiiiiiiiiiiii wrote:

Hi, it seems i've missed last months silicon chip with the hand powered
leds, anyone want to rent/sell/copy me the article or can I get it
online ?

There's not much to it. A hand crank connected directly to a stepper
motor
shaft, and either a half, or full wave bridge rectifier, with as much
capacitance as can fit in the case, directly connected to the led. No
current
limiting resistors were used.

You'll need to experiment with the handle shaft length to make it
comfortable, (there is no gearing).
There was some talk about using supercaps, but they recommended good
quality
supercaps (from farnell) as the el-cheapo supercaps had nothing "super"
about them.

The 1W luxeon led design was the same, but they said you NEED to use a
full
wave bridge instead of a half wave. Again, no current limiting resistors
were
used.

--
Linux Registered User # 302622
http://counter.li.org
Click to expand...
 
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