On Mon, 2012-01-16 at 15:55 +0000, Mauro Santos wrote: > On 16-01-2012 15:14, Ralf Madorf wrote: > > On Mon, 2012-01-16 at 14:55 +0200, Thanasis Georgiou wrote: > > > >> On 16 January 2012 14:03, Kevin Chadwick <ma1l1ists@xxxxxxxxxxx> wrote: > >>> [snip] > >>> I've had to resort to attaching a resistor to the fans wire in the past. > >>> [snip] > >> > >> Or connect it to a potentiometer and have control of the speed. > > > > > > I thought that since we are away from Ataris, we don't need a fan > > control anymore, anyway: > > > > http://www.google.de/imgres?imgurl=http://coolcircuit.com/circuit/fan_controller/automatic__fan_controller.GIF&imgrefurl=http://coolcircuit.com/circuit/fan_controller/index.html&usg=__0gj-rPcDRlYeqo7LP42Sf6GAupE=&h=460&w=644&sz=8&hl=de&start=0&zoom=1&tbnid=Ud3ZU4231DXQDM:&tbnh=162&tbnw=252&ei=Fj4UT_OuGJHKswbBxPQX&prev=/search%3Fq%3Dfan%2Bcontrol%2Bcircuit%26hl%3Dde%26client%3Dfirefox-a%26hs%3DUIp%26sa%3DX%26rls%3Dorg.mozilla:en-US:official%26channel%3Dnp%26biw%3D1152%26bih%3D727%26tbm%3Disch%26prmd%3Dimvns&itbs=1&iact=hc&vpx=379&vpy=165&dur=9865&hovh=190&hovw=266&tx=187&ty=67&sig=115928880652315582645&page=1&ndsp=13&ved=1t:429,r:1,s:0 > > > > > > I doubt this circuit will work, at least not as it is. Dunno, I sent the mail accidentally with an unwanted link. I don't think a circuit with a relay is a good idea. I could ask a friend for a good circuit. IIRC he build fan controls for Atari TT, Falcon and what ever else with QL emulators. My ST with another emulator never had and still has no fan and it's Lacom SCSI unit also has no fan. But in the old days fan controllers were common.
