What is it?

A circular dot-display powered with one ARM Cortex-M0+ micro-controller and 19 LEDs shows twinkling, rotating and other lighting special effects. This display has two pieces. One is the base board where the micro-controller and other components are sitting. The other PCB is the face plate where a beautiful graphic is printed. The face plate likes an add-on to the base to soften the glaring LEDs.

This display is hackable.

• The base board has 5 pins open for other usages such as UART port or GPIO.
• The base board could provide 3.3V power to the add-on face plate.
• The SWD traces to ARM Cortex M0+ are available.
• The kit comes with the source code for SAMD20.

This display comes as a fully assembled kit. The ARM Cortex is pre-programmed with the firmware which show different lighting effects in the video.

Please note that this board has no power and accepts 3.3V only. You could provide the power with a battery and other sources.

A boost converter is made with a boost regulator and a battery holder of 2 AA batteries. You can check out with this option so that you do not have to worry about where to find a power source of 3~3.3V.

Why did you make it?

• The display is a beauty. Just enjoy it while it shows off.
• This display may be ideal for the ARM-Cortex based development from bare metal. Easy to get started. The micro-controller is ATMEL SAMD20E17.
• Besides the special lighting effects, two displays can communicate through UART port. So two displays can synchronize their special effects.
• This display can be used as a module to form a bigger show. For example, you could construct a digital clock with 4 such displays.

What makes it special?

The LED display could be too glaring for eyes sometimes. The two-piece design make the display soft and gentle.

Links

• Visit nwmaker.com for more update
• Follow nwmaker at Twitter