[ad_1]
Once we final featured David Johnson-Davies, he had created an fascinating Morse code messaging pendant. As with many builds, one concept led to a different and the pendant impressed him to come back up a seven-pointed star PCB. Six of those factors comprise coloured LEDs that twinkle in random patterns.
The design runs on an ATtiny10, with three I/O pins that mild up the six LEDs via the facility of Charlieplexing. On this configuration, a number of I/O pins are coupled collectively that output excessive or low alerts, or minimize issues off altogether as inputs. This enables these three pins to exert outsized management over six lights.
As programmed, every flashes in a barely totally different method to create the twinkle impact, dictated by a operate defined within the mission writeup. Every LED has its personal resistor in collection, somewhat than a resistor for every ATtiny10 output. This enables them to be fine-tuned based mostly on the person voltage drop of every mild, normalizing mild output as wanted.
Transferring firmware to the system the identical because the Morse Code pendant, utilizing the Tiny Programming Interface (TPI), together with a customized pogo-pin setup. ATtiny10 code, in addition to the PCB design, is discovered on GitHub permitting you to check out this luminescent creation your self!
[ad_2]
