Just follow the schematic diagram to complete the construction, and use any standard 9VDC Arduino power source to energize the system. Here, for demonstration, three different color LEDs (Red, Green ...

I can get the atmega168 in an arduino for about $4 and some projects don’t need that much power; infact a lot of the projects I see that use a $30 arduino can be made using a $1.50 attiny. kudos ...

Based on a Nordic Semiconductor 32-bit ARM system-on-chip that has built-in support for Bluetooth 4.0, the RFduino runs the same code as Arduino UNO and DUE boards, and it works with any type of ...