Tutorials

2018-02-14

Using a Potentiometer

Tutorial potentiometer, raspberry pi, sensors 0

The Raspberry Pi’s GPIO pins are digital pins, so you can only set outputs to high or low, or read inputs as high or low. However, using an ADC chip (Analogue-to-Digital converter), you can read the value of analogue input devices such as a Potentiometer. SPI The analogue values are […]

2018-02-14

Using an Ultrasonic Distance Sensor

Tutorial distance, HC-SR04, raspberry pi, sensors, ultrasonic 0

In air, sound travels at a speed of 343 metres per second. An ultrasonic distance sensor sends out pulses of ultrasound which are inaudible to humans, and detects the echo that is sent back when the sound bounces off a nearby object. It then uses the speed of sound to […]