RE: Ervan LED's again!!

["Dave McLaughlin" <dave@xxxxxxx>]

Hi Ian,

Good news. Maybe mine will arrive in the next day or so.

I used a microcontroller and a Profet to drive them. I used PWM with a high
brightness blue LED as a test and this worked a treat. The Profet can
handle
a large current and is a TTL compatible high side driver. Check out the
BTS432 from Farnell. Quite expensive but you only need one to drive a large
number of LED's. There are a few lower current devices that are much
cheaper
if you want to try them.

Hope this helps
Dave...
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Very funny Scotty, now beam down my clothes!!!
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-----Original Message-----
From: Ian Lowe [mailto:ian@xxxxxxx]
Sent: 21 November 2003 22:47
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Ervan LED's again!!


I got mine though yesterday, in a jiffy bag:

Not the most responsive, but they got there, and the leds are *insanely*
bright:
just one of them sitting on my desk, pointed at the roof gave off enough
light in my office to read by!!

I'm now looking for a good driver circuit...

Ian.

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