1. Make a setup of 5 mOhm hunt, 2x36V Zeeners, 2x10ohm/1.6W resistors, and INA225 with 5V bias.
2. Connect 300W/220V filament lamps as load.
3. With DVM, measure AC volatge across the shunt.
4. With DVM, measure DC volatge at Output terminal of INA225.
5. Calculate load current/shunt current as: 300/220 = 1.36 A.
6. Feed Vout into A0-point of UNO and map it to show 1.36 A on the Serial Monitor.
7. Remove one 100W lamp. Check that Serial Moniotr shows: 0.91 A.
8. Keep only one 100W lamp. Check that Serial Monitor shows: 0.45 A.
9. Disconnect all loads. Check that Serial Monitor shows: 0.00 A.