You could say that - but the LED won't do much.
- Vote on answer
- posted
10 years ago
Again! Current-limiting resistor for LEDs
Loading thread data ...
- Vote on answer
- posted
10 years ago
How do you prevent a LED from shorting itself?
Is the value of input voltage related?
-- @~@ Remain silent. Nothing from soldiers and magicians is real! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 ???! ???! ???! ???! ???! ???! ????? (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
- Vote on answer
- posted
10 years ago
LEDs are current operated - a fixed voltage is the least suitable way to drive them.
You have been told this by several different people, if you still don't understand - take up woodwork!
- Vote on answer
- posted
10 years ago
What's wrong about that?
All those motherboards out there uses fixed voltage to drive indicator LEDs, I supposed.
I think you are asking for too much from simple LED applications.
-- @~@ Remain silent. Nothing from soldiers and magicians is real! / v \ Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (Fedora 19 i686) Linux 3.9.9-302.fc19.i686 ^ ^ 23:15:02 up 5 min 1 user load average: 0.70 0.55 0.30 ???! ???! ???! ???! ???! ???! ????? (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
- Vote on answer
- posted
10 years ago
I am talking about those simple 3mm/5mm LEDs here, not those hi-power LED lamps....
-- @~@ Remain silent. Nothing from soldiers and magicians is real! / v \ Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (Fedora 19 i686) Linux 3.9.9-302.fc19.i686 ^ ^ 23:15:02 up 5 min 1 user load average: 0.70 0.55 0.30 ???! ???! ???! ???! ???! ???! ????? (CSSA):
formatting link
- Vote on answer
- posted
10 years ago
Those are even more so likely to be fed via a current limiting resistor.
The fixed voltage comes in where you have predictable volt drop - and current through the series resistor.
- Vote on answer
- posted
10 years ago
Maybe you could add negative resistance?
When you apply less than the forward voltage drop, the device becomes a Darkness Emitting Diode, or DED, and it really sucks (light).
Paul
- Vote on answer
- posted
10 years ago
-- Indeed, and neither would be the LED.
- Vote on answer
- posted
10 years ago
-- It appears we're _all_ asking too much from Simple Simon.
- Vote on answer
- posted
10 years ago
It becomes a solar cell! Just not a very good one.
-- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
- Vote on answer
- posted
10 years ago
-- Isn't it inherently PV with no bias?
- Vote on answer
- posted
10 years ago
How do you prevent a LED from shorting itself?
Is the value of input voltage related?
Why don't you look up basic electronics on the internet (a course) or go to a bookstore a buy a book on basic electronics instead of asking all these dumb questions.
Shaun
-- @~@ Remain silent. Nothing from soldiers and magicians is real! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 ???! ???! ???! ???! ???! ???! ????? (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
- Vote on answer
- posted
10 years ago
I expected short answers here. Don't worry, I always google if I know the right set of keywords.
-- @~@ Remain silent. Nothing from soldiers and magicians is real! / v \ Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (Fedora 19 i686) Linux 3.10.5-201.fc19.i686 ^ ^ 21:30:02 up 1 day 2:51 0 users load average: 0.00 0.03 0.05 ???! ???! ???! ???! ???! ???! ????? (CSSA):
formatting link