Measuring the pH can be very useful if we are developing an aquarium, a hydroponic or an automated aquaponic. Next we will explain how this sensor works, how we should calibrate it and we will put an example of functional code to use it with Arduino.
The scroll of a mouse works using a rotary encoder to detect the direction and movement of the wheel so that it helps us better handle the interface of different programs such as web browsers, PDF readers, text editors, etc. .
But a rotary encoder has its advantages and disadvantages regarding using a potentiometer with Arduino as we will see in the following tutorial.
The ESP8266 is a low-cost Wi-Fi chip with full TCP/IP stack and MCU (Micro Controller Unit) capability. This small module allows microcontrollers to connect to a Wi-Fi network and make simple TCP/IP connections using Hayes-style commands. The low price and the fact that there were very few external components on the module attracted many hackers to explore the module. This chip is perfect to start a new IOT (Internet of Things) project.
Measure distances using ultrasonic sensors with Arduino is very common, but not only distances are measured, are also used in robotics for obstacle detection. If you are thinking of using one of these modules in your projects then we explain how the HC-SR04 sensor works. Continue reading
Continuing with sensors that can be used in aquaponics, hydroponics systems or automatic outdoor plant care, we will explain how to use a water level sensor to control the amount of water we have in a tank. The same sensor can also be used to detect if it is raining.