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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. Introduction The objective of this post is to explain how we can control a LED matrix using 2 74HC595 ICs and a ESP8266. With this method, we will only …
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The objective of this post is to explain how to control a motor, including its speed, using an ESP8266 and an ULN2803A integrated circuit. Hardware Since the digital pins of a microcontroller can only source a limited amount of current (in the case of the ESP8266, 12 mA maximum [1]), we can't directly use them …
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How to control a DC motor, including its speed, using an ESP8266 and an ULN2803A integrated circuit.
How to use the Pulse Width Modulation (PWM) technique with the ESP8266
The objective of this post is to illustrate how to chain two SN74HC595 ICs and controlling them, using SPI, with the ESP8266. Introduction The objective of this post is to illustrate how to chain two SN74HC595 ICs and controlling them, using SPI, with the ESP8266. Naturally, the working principle is the same for using the shiftOut …
Continue reading "ESP8266: Controlling chained SN74HC595 ICs"
The objective of this post is to explain how to transfer data between the ESP8266 and the SN74HC595 using the SPI interface. Introduction The objective of this post is to explain how to transfer data between the ESP8266 and the SN74HC595 using the SPI interface. An explanation on how to control some LEDs using this …
The objective of this post is to explain how to connect the SN74HC595 8-bit shift register to an ESP8266 to control some LEDs. Introduction The objective of this post is to explain how to connect the SN74HC595 8-bit shift register to an ESP8266 to control some LEDs. The code to interface with the device is …
The objective of this post is to perform a brief analysis of the SN74HC595 shift register and its working principle.
The objective of this post is to explain how to encode a JSON message using the ArduinoJson library. Introduction The objective of this post is to explain how to encode a JSON message in the ESP8266, using the ArduinoJson library. We assume that the ESP8266 libraries for the Arduino IDE were previously installed. You can check how …
The objective of this post is to explain how to parse simple JSON Arrays on the ESP8266, using the ArduinoJson library. Introduction In this post, we will create a simple program to parse a JSON string that includes an array of integers. We assume that the ESP8266 libraries for the Arduino IDE were previously installed. …
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