RE: 240v LED

["Jon Payne" <jgpayne@xxxxxxx>]

Hi Amir,

You can use a capacative dropper to power an LED from the mains as
follows:

       LED
    ___/____
      \       C = 100nF
250v
N -          --- ----- L
   ___\____
       /
       1N4148

Note that you need the 1N4148 shunt diode  because an LED won't
survive
even a relatively small reverse voltage. The capactior needs to be
unpolarised and rated for mains voltage, I normally use the ones meant
for mains filtering - they are quite big though.

Cheers,
Jon.

-----Original Message-----
From: Amar Nagi [mailto:groups@xxxxxxx] 
Sent: 14 September 2002 12:45
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] 240v LED


is there such thing as a 240v led which i could
use to indicate when a button has been pressed.
I am after something as small as possible.

any options ?

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