In article ,
Adam Aglionby wrote:
Should be easy to check and then maybe knock up a voltage controlled
PWM? I note there are a few old school 555 designs for that

Not seen any that do the fade in fade out when powered up and down,
though.

As was said, it might be easier to use a microprocessor for this.
Above my pay grade, sadly.

PWM won`t quite make it to zero theres a slight step down to zero , but
usually close enough, current control is usually smoother.

Arduino and output transistor, cheaper than building it in discretes

http://arduino.stackexchange.com/que...h-arduino-nano

http://www.ebay.co.uk/itm/like/262459320226

Thanks, Adam, I'll pass this on.

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