Pololu 302 Elenco 21-881 Sound Reversing Car FlySky FS-i4X 2.4GHz 4CH AFHDS R/C Transmitter with FS-A6 Receiver 7kΩ pull-up resistors if your

7kΩ pull-up resistors if your microcontroller lacks internal pull-ups

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carbon film resistors like these are excellent for audio applications

Pololu 302 Elenco 21-881 Sound Reversing Car FlySky FS-i4X 2.4GHz 4CH AFHDS R/C Transmitter with FS-A6 Receiver 7kΩ pull-up resistors if yourPololu 302 Elenco 21 881 Sound Reversing Car The Pololu 302 Elenco 21 881 Sound Reversing Car is an educational robotics kit that combines mechanical assembly with sound activated reverse functionality, designed to teach fundamental principles of motor control, sensor integration, and autonomous behavior. Electronics educators, STEM instructors, and hobbyists use this kit to demonstrate practical applications of sound detection circuits and