diac

Hi all I have an angle grinder which have Maximum power of 950 watt And my country provide 220 volt as voltage source But it have one speed and i want to make a dimmer to control its speed. I used this circuit but it provides at least 130 VAC It make the machine rotate so fast How can i make...

Hello all, I'm currently doing some work on a piece of equipment which has been in my work's storage cupboard for about 8 years. On said piece of kit was this PCB that has seen better days (picture attached). I can't find any paperwork for it and it doesn't appear on any of my electrical...