Letry – Sound activated line following – Page 57

Applies to Letry A002,B001,B002

When the microphone detects sound the first relay is activated, providing power to the second circuit which follows the black line using an IR reflective sensor.

The red LEDs are optional but recommended as they allow you to see the state of the relays easily.

schematic2LsideL FrontL topview_L

Posted in Learn, Letry.