Op-Amp Basics: Build a Light Sensor Amplifier
An LDR (light-dependent resistor) in a divider gives you a voltage that wanders maybe a volt between shadow and sunlight. Feed that to a…
Tag: sensor
Arduino Ultrasonic Distance Meter with HC-SR04
Want your Arduino to sense the world without touching it? The HC-SR04 ultrasonic sensor measures distances from about 2 cm to 400 cm using sound —…
5 min