The I2CKeyPad8x8 library implements the reading of a 8x8 keypad by means of a PCF8575. Smaller keypads, meaning less columns or rows (e.g. 5x4) can be read with it too. Feedback as always is welcome.

The I2CKeyPad library implements the reading of a 4x4 keypad by means of a PCF8574. Smaller keypads, meaning less columns or rows (4x3) can be read with it too. Since 0.3.2 the library allows a 5x3, ...

When it comes to microcontroller boards, Arduino and Raspberry Pi are famous, but lately I've been hooked on the Pro Micro. Small, cheap, and easy to use—this trifecta of features really boosts the ...

The multitasking has led the computers to a revolution where one or more programs can run simultaneously which increases efficiency, flexibility, adaptability and productivity. In embedded systems, ...

To build an FM receiver, developers can use highly integrated chips, such as the TEA5767 from NXP. Here we describe an FM receiver with a frequency range of 76 to 108 MHz and 2 x 3 W stereo sound ...

CNXSoft: This getting started guide was initially posted in Thai language by Suthinee Kerdkaew, and I’ve just translated her work into English with some minor edits. As discussed in an earlier article ...

What is Switch Bouncing and Debouncing? When we press a pushbutton, or toggle switch, or a micro switch, two metal parts come into contact to short the supply. But they don’t connect instantly; the ...

This project turns the Arduino into an OBD2 on-board diagnostic tester. So, the Arduino can read OBD2 vehicle data and it can read and clear emissions-related diagnostic trouble codes and ...