Smart Electronics 4pin KY-024 Linear Magnetic Hall Switches Speed Counting Sensor Module diy Starter Kit KY024 for arduino
$ 1.39
Description 1. has the signal output instructions. 2. single signal output. 3. effective signal output for low level. 4. sensitivity adjustable pure tone (). 5. have the field cuts have signal output 6. circuit boards output switch quantity! (can be directly by SCM)
