So I took a cheap mini drill from Ali Express added a motor controller, stripped out the transformer that had a Euro lead on it and added an NZ cord and plug and now I have a mini drill that goes really slow and the whole thing cost lest than $20
The following user(s) said Thank You: Nosferatu, yak
It's not really a score in the sense that I found something cheap, I bought the components with the intention of building a variable speed drill. Without the motor controller it runs at some insane speed but with the controller you can see it turning, it's that slow. It also has a fair amount of torque which is always good.
I have a feeling that I'm going to be building another one for someone else....... so I'll try to document the steps so anyone can do it.
I can't post pictures as I've made mine already and I don't want to be held accountable if you electrocute yourself or burn your house down.
Basically here are the steps roughly, if you have to ask more questions then you shouldn't be doing it and that's not just me being mean.
THE TRANSFORMER HAS 240V ON ONE SIDE OF THE PCB IT CAN KILL YOU
There's a screw on the bottom of the power adaptor, unscrew it and slide the transformer out, then cut the wires that go to the pins.
Next up take an old donor lead from an old appliance, I prefer the figure of 8 two pin leads. Leave the plug on but cut the socket (the female end) off.
Strip back the lead to expose the brown and blue cores.
Now solder them to the two points on the transformers PCB that the two leads from the pins are attached (removing them first).
The output side of the Transformer also needs to be removed (that's the one with the 12V connector on) unsolder it.
Add two new leads from the motor controller labelled + / - Power and solder them to the points you just removed.
Using the 12V lead you just unsoldered connect these up to the + / - Motor out connectors on the speed controler.
Make sure you don't put + to the - input of the speed controller or you will kill it, the other end isn't so important as the motor will just run the wrong way.
I won't be doing mine, got a mate who's an autosparkee who will know his stuff and can help
Otherwise if you would like to do a build/how to post I can send u mine to make up and tak photos as you go instead if that helps?
I don't really want to do a how to as I'm not sure of the legal side, if one of you electrocutes yourself following my guide.
Again I would offer to do it, but if it burns your house down am I liable?
All you're doing is moving wires around it's not hard, bring yours to Taupo and I'll take some photos and highlight where things go.