Lot of setups should work stock with the arduino usb powering but you may need to add an additionnal 5V power supply if you goes above the 500mA power consumption Connect the ground to the arduino ...

This paper presents the simple and low-cost design of an automatic power factor correction (APFC) system for single phase domestic loads. The proposed design uses TRIACs to switch the capacitor banks ...

Open arduino setup tool, when it asks for Arduino IDE download, Press OK. A window will open to download the required arduino componenents. Open arduino setup tool; Give a unique name to your arduino ...