ESP8266: Controlling a LED matrix with the 74HC595 ICs
The objective of this post is to explain how to control the LEDs of a LED matrix using 2 74HC595 ICs and a ESP8266 microcontroller.
Electronics
ESP8266: Controlling chained SN74HC595 ICs
The objective of this post is to illustrate how to chain two SN74HC595 ICs and controlling them, using SPI, with the ESP8266.
ESP8266: Connection to SN74HC595 via SPI
The objective of this post is to explain how to transfer data between the ESP8266 and the SN74HC595 using the SPI interface.
ESP8266: Connection to SN74HC595
The objective of this post is to explain how to connect the SN74HC595 8-bit shift register to an ESP8266 to control some LEDs.
Buying cheap electronics at Ebay: Part 1
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 …
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.
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.