normspanners
Member
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Hi guys Im just trying to learn,
just a quick one I have a 12v fan cooling a heatsink I used a 12v coz I had several from PC power supplies .
To keep it simple I thought, the tranny the fan is running off is 22-0-22 toroidal, which is part of the amplifier, For ease I used 0-22v and half waved it with a diode and capacitor of about 10uf 50v this gives me 12v dc but end up with reduced speed silent fan . All works fine, two components, simples.
But when first started the fan can be a little noisy (I would guess feq. noise) till it all 'warms', should I have included a balance resistor parallel to the fan and bigger value cap say 47uf?
Thanks
just a quick one I have a 12v fan cooling a heatsink I used a 12v coz I had several from PC power supplies .
To keep it simple I thought, the tranny the fan is running off is 22-0-22 toroidal, which is part of the amplifier, For ease I used 0-22v and half waved it with a diode and capacitor of about 10uf 50v this gives me 12v dc but end up with reduced speed silent fan . All works fine, two components, simples.
But when first started the fan can be a little noisy (I would guess feq. noise) till it all 'warms', should I have included a balance resistor parallel to the fan and bigger value cap say 47uf?
Thanks