The objective of this post is to explain how to control a passive buzzer module using an ESP8266.
Real Time Clock: DS3231
The objective of this post is to describe the main functionalities of the DS3231, a very accurate real time clock from Maxim.
Buying cheap electronics at Ebay: Part 1
This post lists some components to create a basic electronics prototyping kit, which can be bought for very low prices at eBay.
Laws of electronics: KCL
This post describes one of the basic laws of circuit analysis, more precisely KCL (Kirchhoff’s Current Law), which states that the the sum of the currents leaving and entering a node is zero.
Using a ULN2803A to control a DC motor
This post explains how to use the ULN2803A IC to control a DC motor, using an Arduino board.
Shorting a voltage source conceptual error
This post describes some conceptual errors with voltage sources, that arise from the definition of voltage source and short circuit.
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Toggling a LED with Arduino and HC-06
Following the previous post describing the HC-06 module, this one shows how to use it to build a simple program to toggle the debugging LED of an Arduino board, using Bluetooth.
This tutorial assumes the use of the HC-06 integrated in the baseboard described in the previous post.
Arduino Bluetooth with HC-06
This post describes the HC-06 Bluetooth module and shows a simple app to turn on and off a lamp with an Arduino board.
Resistors calculations and voltage divider
This post explains some basic calculations with resistors and voltage dividers.
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Cheap power supplies
This post lists some cheap options for power supplies to use in electronic and embedded systems projects.