Category Archives: Electronics

Electronics: Rain Sensor

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

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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.

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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.

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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.

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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.

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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.

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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.

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