4 Attachment(s)
PSU Rectifier + Capacitor smoothing board for toroidal transformer
I've made a handful of these bridge rectifier PCBs for connecting with toroidal transformers to make PSUs ideal for stepper motors.
Attachment 20115
Attachment 20116
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:
Attachment 20119
Attachment 20118
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.
Re: PSU Rectifier + Capacitor smoothing board for toroidal transformer
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.:thumsup:
Re: PSU Rectifier + Capacitor smoothing board for toroidal transformer
I've just received mine, much nicer made than if I'd done it.
thanks,
Andy
Re: PSU Rectifier + Capacitor smoothing board for toroidal transformer
sent you pm regards components.
Thanks
Tom