The Really Bare Bones Board (RBBB) is a mini board designed for those experimental applications that require small processors, such as wearable computing, near space experiments, toy prototyping, artist’s projects or any use for a fairly small, low-cost microcontroller.

It’s one of the smallest and lowest-cost Arduino-compatible boards available right now. You can build a RBBB in under half an hour, even as a beginner. The pin labels on version B2 are now between the pins, similar to the Arduino Nano.

We recently added 3.3V models and a bundle with a cable, and a  BUB II. When ordering the bundle you may specify cable length (1', 3', 6') and voltage (3.3V or 5V) in the Order Notes field on the Shopping Cart page or we will  supply a 3' cable and a 5V regulator as the stock option.

Also available in Europe at JeeLabs.org.

Specifications

• 2.1mm power jack
• Optiboot bootloader (Uno setting)
• ATmega328 Chip
• L4931CZ50-AP TO-92 low dropout regulator (300 mA)
• Note: Regulators such as MC7805CT-BP , LM2940 , or other TO-220 1A regulators make great alternatives if you need more power on your breadboard.
• We now also have these available with 3.3v regulators (L493133)
  

Options

• Bare PCB
• Unassembled kit
• Assembled, populated, and tested board

Resources

• RBBB kit assembly instructions and schematic
• RBBB design files in Osmond PCB a Mac-only PCB layout package.
• RBBB two layer screen shot

Purchase Matrix