A quick rundown of five essential sensors: ultrasonic, soil moisture, sound, MQ2 gas, and color recognition.
A quick rundown of five essential sensors: flame, Sharp IR distance, rain, MPU-6050, and the TTP223B touch sensor.
A rundown of five more sensors: water flow, vibration, heart rate pulse, Hall effect magnetic sensor, and dust sensor.
A comparison of DC, servo, and stepper motors by how each works and which is best suited to which use case.