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Posted to uk.d-i-y
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Auto dimmer for LEDs
On 25/11/16 13:52, wrote:
On Thursday, November 24, 2016 at 1:01:11 PM UTC, wrote:
On Wednesday, 23 November 2016 13:42:32 UTC, wrote:
Trailing Edge, AKA Reverse Phase Control, RFC is a technical backwater , a patch for retro fit to cover early driver limitations.
cheaper rather than early
RPC dimmers are considerably more complax and costly than forward phase choppers.
LEDs are best dimmed and driven at the driver.
Usually they're best dimmed wherever it's cheapest
Dimming seems usually considered in domestic installls as something of a luxury, cost isn`t a primary consideration.
From article quoted "...adjustable minimum brightness..." isn`t something that`s needed when LEDs can be dimmed to near zero directly at driver.
Dimming the power, whatever way, to the driver will always have aminimum setting below which cannae go.
There are a few ways you can dim RC ballasted LEDs all the way to zero.
If you have one, there is a multi multi million pound market available, unfortunately you cannae change the laws of physics....
Don't need to.
Current drivers is all it takes.
Knowing how to drive a diode junction has been part of electronics for
years...
If you want to retrofit rather than rewire , major brand dimmable LEDs will now make a reasonable job of dimming to a low level on any phase chopping dimmer.
NT
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