Real Time Clock: DS3231
The DS3231 is a real time clock from Maxim that allows us to measure time with a very good accuracy.
Real Time Clock: DS3231 Read More »
The DS3231 is a real time clock from Maxim that allows us to measure time with a very good accuracy.
Real Time Clock: DS3231 Read More »
How to connect the DHT11 sensor to an ESP8266 and obtain measurements.
ESP8266: Read DHT11 measurements Read More »
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
Buying cheap electronics at Ebay: Part 1 Read More »
Architecture of a simple IoT temperature logger using the ESP8266 and a web server deployed on the cloud.
IoT: Temperature logger Read More »
Description of Kirchhoff’s Current Law (KCL).
Laws of electronics: KCL (Kirchhoff’s Current Law) Read More »
Description of KVL (Kirchhoff’s Voltage Law), one of the basic laws of circuit analysis.
Laws of electronics: KVL (Kirchhoff’s Voltage Law) Read More »
How to use the ULN2803A IC to control a DC motor, using an Arduino board.
Using a ULN2803A to control a DC motor Read More »
This post describes some conceptual errors with voltage sources, that arise from the definition of voltage source and short circuit.
Shorting a voltage source conceptual error Read More »
This post describes the HC-06 Bluetooth module and shows a simple app to turn on and off a lamp with an Arduino board.
Arduino Bluetooth with HC-06 Read More »
This post explains some basic calculations with resistors and voltage dividers.
Resistors calculations and voltage divider Read More »