Re: PWM DC motor circuit?

From: John Jardine (john_at_jjdesigns.fsnet.co.uk)
Date: 07/10/04 

Date: Sat, 10 Jul 2004 16:39:28 +0100

Terry Pinnell <terrypinDELETE@THESEdial.pipex.com> wrote in message
news:badve05nj0avdhtq06qipbn7sd1mipp9hu@4ax.com...
[clp]
> Terry Pinnell
> Hobbyist, West Sussex, UK
>
My cooker extracter uses a pot', setting a 555 pwm, driving a TIP110
darlington, directly feeding an ex Alfa-Romeo radiator fan. Frequency is
arbitrary at a couple of kHz. No heatsinking, no protection or
jiggery-pokery parts, other than a diode across the motor.
There must be all of 50p's worth of bits and it's run fine for years.
regards
john

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