TSL2561 – light sensor module
The TSL2561 measures light intensity from which lux values can be calculated. Its interrupt functions can be used with the Sparkfun library.
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APDS-9960 – the all-rounder
The APDS-9960 allows measuring gestures, distance, ambient light and color. The module and its functions are explained in this post.
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Debugging for the Arduino UNO with Atmel Studio
Step-by-step guide to debugging the Arduino UNO using Atmel Studio and a suitable programmer. The integration of libraries is explained.
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I2C scanner
An I2C scanner sketch is introduced. This allows to determine I2C addresses or to check non-functioning circuits with I2C component.
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Port expander MCP23017
The 16-bit I/O port expander MCP23017 is introduced including a library. The functions are explained by sketches and circuits.
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Counter ICs
The counter ICs 4040, 4017 and 4033 will be presented. In addition to the counter function, I explain how to use the counters for port expansion.
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ESP-01 port expansion
Port expansion for the ESP-01 using the MCP23017, PCF8574 and the 74HC595 shift register are explained in this post. With circuits and sample sketches.
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ESP8266 ESP-01 module
Controlling ESP-01 modules with the Arduino IDE is explained step by step. I provide example sketches with circuits. Also: AT commands.
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MP3-player YX5300
Control your YX5300 MP3 player with the SerialMP3Player library. And: how to (voice-) control the MP3 player with the smartphone. Also: SD card problems?
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Controlling Arduino boards with your smartphone
Arduino boards (or other MCUs) can be controlled via Bluetooth with your smartphone. There are pre-built apps for this or you can develop them yourself with MIT App Inventor.
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