Re: Simple 555 PWM - disappointing performance

"Herbert Blenner" <a1eah71@xxxxxxx> wrote:

>Replace Q1 with a PNP transistor in common collection configuration.
>Now this circuit can take advantage of the sizable current sink
>capability of the 555 timer. Further since you are now switching
>voltage across the motor, D1 is not needed.

Thanks, Herbert, but according to the LM555 data***, a 555 "output
can source or sink 200 mA."
>
>>
>> --
>> Terry Pinnell
>> Hobbyist, West Sussex, UK

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