recipe 7.6. Sequencing Multiple LEDs: Creating a Bar Graph

7.6.1. Problem

You want an LED bar graph that lights LEDs in proportion to a value in your sketch or a value read from a sensor.

7.6.2. Solution

You can connect the LEDs as shown in Figure 7-2 (using additional pins if you want more LEDs). Figure 7-5 shows six LEDs connected on consecutive pins.