USB BUB 3
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USB to TTL Serial Adapter
The BUB III is here!
It's blue, in honor of the Jee Internationale.
It's tiny (2 cm × 1.6 cm × 0.7 cm) — the smallest FTDI option besides an FTDI cable.
It's flexible (it can be reflashed so the LEDs indicate whatever you want).
Features:
- Red and green LEDs show serial activity on both the TX and RX lines.
- Jumper pads to select between 5V and 3.3V power levels.
- Jumper pads to select between 5V and 3.3V logic levels.
- A capacitor on the DTR line to make interfacing with breadboard and DIY Arduinos easier.
The output header matches the FTDI RS232 cable pinout (used by the BBB, RBBB, LilyPad, Arduino Pro, etc.), but with the added bonus of using the DTR line instead of the RTS line — just like official Arduino schematics.
Default Options
The BUB III ships with:
- 5V power option soldered by default
- 3.3V logic level option soldered by default
This results in power (VCC) at 5V and signal logic levels at 3.3V. This works with Optiboot and Decimilia bootloaders on every Freeduino/Arduino board we've tested.
Package Contents
The BUB III ships by itself, with the 1×6 female header soldered to the bottom.
It uses a micro-USB connector (same as most Android phones).
Jumpers
I/O jumper — Sets the logic level on the signal pins (3.3V by default):
VCC jumper — Sets the voltage on the VCC pin (5V by default):
Installing FTDI Drivers
The BUB III, like all FTDI-based USB devices, requires drivers to be installed.
Download drivers for your operating system here.
Installation is simple:
- Mac: Click the DMG file and install.
- Windows: Follow prompts after "Found New Hardware" appears. You may need to visit Device Manager to confirm or reinstall.
- Linux: Most modern kernels already have FTDI drivers installed. Otherwise, upgrade your kernel.
Once installed, the virtual serial port will appear in Arduino → Tools → Serial Ports. It will appear/disappear when you plug/unplug the BUB III.
Resources
