Electronics designer and prolific crowdfunder Patrick Mitchell is back with his latest creation, a programmable counter designed to be used standalone or programmed from an Arduino, Raspberry Pi, or other external controller.
"The Ninja Counter is a programmable up counter, down counter, and point accumulator that can be programmed manually using only one on-board button, or digitally with your Arduino or Raspberry Pi," Mitchell explains. "To make things more interesting, you can modify the provided source code, and re-program the Ninja Counter itself using an external Arduino Uno!"
The ruler-like board is more than just a counter, though. It includes an on-board four-digit seven-segment LED display, a 10A 250VAC/30VDC relay, a piezoelectric buzzer, and a Microchip ATmega328 microcontroller, which can be reprogrammed to run the user's own code.
The Ninja Counter includes an interesting single-button user interface, which allows the user to switch between countdown, count-up, and point accumulator modes. A combination of pressing and holding sets values, and a final press starts the program — firing off an alarm and activating the relay when the programmed target is reached.
The board is currently funding on Kickstarter, priced at $6 for an unpopulated PCB or $34 for a kit-form version with all parts bar a power supply. The design is tested and production-ready, Mitchell claims, with hardware to be delivered in November this year.