The objective of this post is to describe a cheap rain sensor that can be used to detect rain with microcontrollers such as the Arduino or the ESP8266.
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.
Continue reading “ESP8266: Controlling a LED matrix with the 74HC595 ICs”
Buying cheap electronics at eBay: part 3
This post lists some ICs commonly used in electronic projects and explains how to buy them for cheap prices at eBay.
Continue reading “Buying cheap electronics at eBay: part 3”ESP8266: Controlling a motor with the ULN2803A
The objective of this post is to explain how to control a motor, including its speed, using an ESP8266 and an ULN2803A integrated circuit.
Continue reading “ESP8266: Controlling a motor with the ULN2803A”
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.
Continue reading “ESP8266: Controlling chained SN74HC595 ICs”
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.
SN74HC595: Shift Register
The objective of this post is to perform a brief analysis of the SN74HC595 shift register and its working principle.
Buying cheap electronics at Ebay: Part 2
This post lists some basic components for creating projects that require soldering and explains how to buy them for cheap prices at eBay.
Designing a LED matrix
The objective of this post is to explain how to create a simple LED Matrix using PNP transistors and a ULN2803A integrated circuit, and assuming that only one LED needs to be connected at each time.