This Saturday we’ll be in Shenzhen hosting a meetup at Bionic Brew at 19:00. Join us there and bring along your own hardware projects to show around. Everyone loves hearing about that latest build!
Even if you’re not in the area you can help us out by spreading the word. Tell your friends, share on your social media, and let us know about anyone in town who you think we should reach out to. Here’ s a poster if you want to print it out and hang it at your hackerspace, workplace, or other area where awesome people congregate.
The things you can do at this meetup: Laugh, drink, eat, and be happy. Talk excitedly about datasheets and timing diagrams. Pretend you hate talking about timing diagrams while being secretly giddy that someone wants to hear what you think of them. Recount your epic battles to meet production deadlines. Show off that latest blinky LED project you just got working. Meet a ton of awesome people. You can RSVP here to tell us you’re coming. See you soon!
[Becky Stern] has created the mindfulness bracelet, a wearable which looks great and serves an important purpose. The bracelet buzzes every hour to remind you to stand up and take a break from work, soldering, gaming, or whatever it is you may be doing. The bracelet is made up of interlinked figure 8 shapes of leather, though [Becky] says rubber from a bicycle inner tube works great as well. The final shape reminds us of the link belts sometimes found on lathes or other industrial equipment. The links are the perfect size to slip an Arduino Gemma in, along with a battery and vibrating motor. A NPN transistor, diode, and resistor round out the entire bill of materials for this design. This bracelet is a heck of a lot cheaper than the Apple watch feature which inspired it!
The time interval is set in the code to 1 hour, and can be adjusted by the user. Although the times are stored in milliseconds, the design does use the ATtiny85’s Watchdog Timer (WDT) to conserve power. This means the time can drift up to 30 seconds per hour, which is fine in this application.
Click past the break to see the bracelet in action!
Continue reading “Get up, Stand up. With a Little Help from the Mindfulness Bracelet”