Ldr
Day 10: Project — Smart Night Light
Day 10 of Learn Coding with Arduino — build a night light that switches itself on when the room goes dark, plus a push button so you can override it too.
Day 16: Show Sensor Values on the LCD
Day 16 of Learn Coding with Arduino — show live potentiometer and LDR readings on the 16x2 LCD without any flicker. Your Arduino gets a real dashboard.