Parts List

• Arduino microcontroller
• MakerShield kit
• S1: tilt control switch
• R1: 1KΩ resistor (brown, black, red stripes)
• R2: 330Ω resistor (orange, orange, brown stripes)
• R3: 330Ω resistor (orange, orange, brown stripes)
• LED1: green LED
• LED2: red LED

Figure 8-1. The Up-Down Sensor block diagram

TECH NOTE

A tilt control switch is sometimes called a tilt sensor.