10 Dec
2014
10 Dec
'14
9:25 a.m.
On Wed, Dec 10, 2014 at 7:53 AM, joem joem@martindale-electric.co.uk wrote:
if you have one of those boards can i ask you the favour of locating the white LED circuit and sending me a macro-zoom photo (both sides) of that section of the board, highest resolution you can?
Will try
star.
If instead you were to send a PWM signal say 1kHz for SY7201A then LED can be dimmed depending on MARK:SPACE ratio of the signal. : RC circuit not needed.
the only reason i can think of that it's been done is that the RC circuit can be used, at high enough frequency, to vary the current rather than do actual PWM at coarse/low frequency.
anyway, it's gone.
l.