Category Archives: Electronics

Electronics: Rain Sensor

Posted on December 18, 2016 by antepher

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. Advertisements

Posted in Electronics | Tagged Arduino, cheap electronics, eBay, Electronics, ESP8266, NodeMCU, Rain drop sensor, Rain sensor, Sensor | 1 Comment

ESP8266: Controlling a LED matrix with the 74HC595 ICs

Posted on September 17, 2016 by antepher

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.

Posted in Electronics | Tagged 74HC595, Arduino, Electronics, ESP8266, LED, LED driver, LED Matrix, Microcontrollers, NodeMCU, prototyping, Serial, SN74HC545, ULN2803 | Leave a comment

Buying cheap electronics at eBay: part 3

Posted on September 17, 2016 by antepher

This post lists some ICs commonly used in electronic projects and explains how to buy them for cheap prices at eBay.

Posted in Electronics | Tagged 74HC595, cheap electronics, eBay, Electronics, MCP41010, prototyping, SN74HC545, ULN2803, ULN2803A | Leave a comment

ESP8266: Controlling a motor with the ULN2803A

Posted on September 12, 2016 by antepher

The objective of this post is to explain how to control a motor, including its speed, using an ESP8266 and an ULN2803A integrated circuit.

Posted in Electronics, ESP8266, Microcontrollers | Tagged Arduino, DC Motor, DC Motor Speed Control, Electronics, ESP8266, Microcontrollers, NodeMCU, prototyping, ULN2803, ULN2803A | 1 Comment

ESP8266: Controlling chained SN74HC595 ICs

Posted on September 4, 2016 by antepher

The objective of this post is to illustrate how to chain two SN74HC595 ICs and controlling them, using SPI, with the ESP8266.

Posted in Electronics, ESP8266, Microcontrollers | Tagged 74HC595, Arduino, Electronics, ESP8266, LED, Microcontrollers, NodeMCU, prototyping, Serial, SN74HC545 | 5 Comments

ESP8266: Connection to SN74HC595 via SPI

Posted on August 31, 2016 by antepher

The objective of this post is to explain how to transfer data between the ESP8266 and the SN74HC595 using the SPI interface.

Posted in Electronics, ESP8266, Microcontrollers | Tagged 74HC595, Arduino, Electronics, ESP8266, LED, LED driver, Microcontrollers, NodeMCU, prototyping, Serial, Serial Peripheral Interface, Shift Register, SN74HC545, SPI | 4 Comments

ESP8266: Connection to SN74HC595

Posted on August 30, 2016 by antepher

The objective of this post is to explain how to connect the SN74HC595 8-bit shift register to an ESP8266 to control some LEDs.

Posted in Electronics, ESP8266, Microcontrollers | Tagged 74HC595, Arduino, Electronics, ESP8266, LED, Microcontrollers, NodeMCU, prototyping, Serial, Shift Register, SN74HC545 | 4 Comments