The DS3231 is a real time clock from Maxim that allows us to measure time with a very good accuracy.
How to connect the DHT11 sensor to an ESP8266 and obtain measurements.
Introduction The objective of this series of posts is to list some electronic components and devices useful for makers and hobbyists that can be bought by very low prices at eBay. Many times, we can find those devices at a much lower price than in many specialized stores, making them affordable to more people. In this particular …
Architecture of a simple IoT temperature logger using the ESP8266 and a web server deployed on the cloud.
Description of Kirchhoff’s Current Law (KCL).
Description of KVL (Kirchhoff’s Voltage Law), one of the basic laws of circuit analysis.
How to use the ULN2803A IC to control a DC motor, using an Arduino board.
This post describes some conceptual errors with voltage sources, that arise from the definition of voltage source and short circuit.
This post describes the HC-06 Bluetooth module and shows a simple app to turn on and off a lamp with an Arduino board.
This post explains some basic calculations with resistors and voltage dividers.