Toroidal transformer voltages - sanity check needed!

[Jonathan]

I'm going to get a switched mode Din rail 12V PSU for 12V needs to simply things, so don't need any extra windings.

Luke11cnc has one that might be suitable going spare. I've got a few too...

35V is cutting it a bit close. It theoretically gives 49.5V rectified, less 1.4V for the bridge, gives about 48V, but that's at a rated input of 230Vac, so by the time you allow 10% for mains variation, it takes you well over 50V.

It depends...
Clearly 30V transformer is the safest option - the margins are a bit close otherwise. I probably shouldn't recommend more but if it was me I'd get the 35V and if required do what I said in the last post to reduce the output a bit. Then maybe run the motors with oscilloscope on power supply just to be sure.

Airlink looks to have £9 postage, which makes them more expensive than Rapid electronics ... if it's some other electronics bits you need then Rapid is bound to have them which might even get you to the free postage boundary.