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CT101V1 - ChromaTab

The ChromaTab is a tiny, Arduino compatible board, that can be soldered directly onto a WS2812B intelligent LED strip.
Based on the Arduino ProMini and built around a ATMEGA328P, the ChromaTab is fully compatible with the Arduino IDE and can be easily updated or customised with new sketches. Sketches can be uploaded via a USB to serial converter. The firmware is based around the Adafruit Neopixel library and so new animations and effects can easily be created.
Measuring just 10mm in width, the ChromaTab can easily fit into the tight spaces you may want to fit lengths of WS2812B strip. The extruded aluminium profiles you can get for mounting LED lighting is one such place you may want to fit these strips with a ChromaTab.
As well as the 3 castellated pads, with a 2.54mm pitch, all the other pins are broken out with 1.27mm pitch holes arranged in 2x 10 way rows, 1x ISP 6 way row and 1x Serial 5 way row.
Included with the board are 2x 10 way, 1x 6 way and 1x 5 way male 1.27mm pitch pin headers.
This small pitch allows for systems that need to be kept small and compact. As well as the supplied headers you could also solder standard ( 1.27mm) ribbon cable directly to the through holes.
Please Note: photos show prototypes, The final product will differ slightly.
There will soon be some add-on boards (Tags) that will be designed to fit on to the 2x 10 way headers. These Tags will provide functions such as a USB to serial converter and a VUmeter.



  • Tiny form factor, just 10mm x 43mm

  • ATMEGA328p microcontroller

  • 3 Castellated pads for soldering directly onto WS2812B strips

  • 2 Buttons

  • All Arduino Uno/Mini pins broken out

  • 5v on-board regulator, can be run at down to 5v due to very low drop out

  • Add-on boards (Tags) will be available soon



43mm wide x 10mm high x 4mm deep.



Atmel ATmega328P in MLF-28pin package

Input Voltage

5V to 7V

Operating Current

Approx 90mA average during normal operation  Max. 300mA

Current per I/O pin


Clock speed



2 KB


1 KB

Flash Memory

32 KB

Digital I/O pins

14 ( of which 6 are PWM )

Analog Input pins


For the latest firmware and documentation,

click here. Go to downloads page


To purchase your ChromaTab

Go to Seeedstudio Basaar - ChromaTab


Buy direct from Carbon Frog