I'll pour a little water on it next time, that always seems to complete my circuits..Originally Posted by Sparky
Simple electronics - you have to have a complete circuit or you get nothing
Nice! Yes, PWM would be a nice additionPWM from all motherboard is 5V ~25kHz,
50%-100% PWM = 2.5V-5V after the RC filter
R=4k and C= 0.01uF is for ~20kHz (and it should work for ~25kHz) according to AN538
the next project is PWM control the sanyo board, but it's already very silent at 12V, is it need to speed down
FYI, the Sanyo motor is nice and quiet, it sounds much more like a DDC3.1.This has been a great thread to keep tabs on.
Doing a quick and dirty test, not even apples to oranges. The DDC1 had an old PTS acetal top, the Sanyo had and acrylic top.
Ambient = 35.5 dbA
Ambient + DDC1 = 41.7dbA (+6.2dbA)
Ambient + DDC1 with DIYINHK Sanyo PCB = 38.1 (+2.6dbA)
I'll have to do a more apples to apples (Same Top) video recording type of test in an actual loop, but the Sanyo controller is nice and quiet.
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