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  1. #1
    I've made a handful of these bridge rectifier PCBs for connecting with toroidal transformers to make PSUs ideal for stepper motors.

    Click image for larger version. 

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    Click image for larger version. 

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    They have two 10,000uF 100V capacitors in parallel to give 20mF total. This is good for a machine with three of the common 3Nm stepper motors from a 50VAC toroidal transformer and OK for four 3Nm motors, though in this case I like to use two and put one on each winding.

    Examples:
    Click image for larger version. 

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    Click image for larger version. 

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    Component cost (approx):
    Capacitors 2 x £2.50,
    Rectifier, £0.44,
    Terminal blocks, £0.30
    3W resistor, £0.04,
    PCB laminate, £0.30

    So I think £10 each is a fair price, plus postage - 2nd class Royal mail is £2.85 up to 1kg.

    If anyone buys one I'll make a diagram and post any guidance required here. If lots of people buy them I'll get PCBs made and buy the capacitors in bulk, which should reduce the price a little.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  2. The Following 4 Users Say Thank You to Jonathan For This Useful Post:


  3. #2
    Jonathan I think that is a very nice gesture from you and I am sure it will take the pressure from quite a few that are not happy building one.
    ..Clive
    The more you know, The better you know, How little you know

  4. #3
    I've just received mine, much nicer made than if I'd done it.

    thanks,
    Andy

  5. #4
    sent you pm regards components.

    Thanks
    Tom

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