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.
Read MoreThe 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.
Read MorePort expansion for the ESP-01 using the MCP23017, PCF8574 and the 74HC595 shift register are explained in this post. With circuits and sample sketches.
Read MoreControlling ESP-01 modules with the Arduino IDE is explained step by step. I provide example sketches with circuits. Also: AT commands.
Read MoreHow to control the DFPlayer Mini with Arduino or buttons; specifications and properties; folder and file structure; DFRobotDFPlayerMini library
Read MoreControl your YX5300 MP3 player with the SerialMP3Player library. And: how to (voice-) control the MP3 player with the smartphone. Also: SD card problems?
Read MoreArduino 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.
Read MoreDetailed and step-by-step instructions for HC-05 and HC-06 Bluetooth modules. AT commands, circuit, pairing and testing of the Bluetooth connection.
Read MoreA rain warning system that switches an alarm siren connected to a radio socket is presented in this post. Also: how to build the actual sensor yourself.
Read MoreHow to develop your own radio protocols for 433 MHz using Arduino and Co without libraries. Two concepts are introduced.
Read MoreHow to use radio sockets and hand transmitters using Arduino. The RCSwitch library is used. In addition: Build hand transmitters by yourself.
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