Parts List

• Arduino microcontroller
• Full breadboard
• R1: 10KΩ potentiometer
• R2: 1KΩ resistor (brown, black, red stripes)
• R3: 330Ω resistor (orange, orange, brown stripes)
• Q1: S39014 NPN transistor or equivalent
• PB1: pushbutton switch
• One long jumper wire
• LCD1: LMB162ABC 16×2 LCD (liquid crystal display) with soldered 16-pin male header (electrical connector)

Figure 16-1. A Logic Tester with an LCD