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Klaas Robers wrote:So: 5 volt is not enough to switch an IRF power FET on. May be you can get an IRL540? Otherwise you need an extra driver transistor. Then the circuit is just as complex as the self built "Darlington" with that extra driver transistor.
It is not impossible that you should use an inductor in series with the motor. But it is not so easy as you cannot use Ferrite ring cores. They will be saturated by the DC current. But you might wind an inductor around a ferrite rod, or just make an air coil. Until now I hoped that the inductance of the motor itself is large enough to act as the needed series inductance. The wave forms (oscilloscope) will give more information.
Andrew Davie wrote:Circuit building: stop using antique parts!
Andrew Davie wrote: I have ordered some IRL540
gary wrote:Andrew Davie wrote: I have ordered some IRL540
If you are in a hurry Core Electronics can get one to you in 3-7 days for $4.95 + $3 shipping.
Andrew Davie wrote:Circuit building: stop using antique parts!
Harry Dalek wrote:Great project Andrew its way above my head a lot of it so i am just viewing in the back ground
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