Joe Grand is Hiding Data in Plain Sight: LEDs that Look Solid but Send a Message

Thursday night was a real treat. I got to see both Joe Grand and Kitty Yeung at the HDDG meetup, each speaking about their recent work. Joe walked us through the OpticSpy, his newest hardware product that had its genesis in some of the earliest days of data leakage. Remember those lights on old modems…

via Joe Grand is Hiding Data in Plain Sight: LEDs that Look Solid but Send a Message — Hackaday

Joe Grand is Hiding Data in Plain Sight: LEDs that Look Solid but Send a Message

Open Source Turtle Robot Kit Teaches Beginners & Creates Beautiful Art

 writes on the Tindie blog about this robotics kit from The Maker’s Box:


Open Source Turtle Robot Kit Teaches Beginners & Creates Beautiful Art

The Open Source Turtle Robot (OSTR) was created as the basis for a two-day workshop where high school students could gain hands-on experience with engineering concepts. The finished robot even creates interesting pieces of art via pen plotting with Turtle graphics.


The project is Arduino compatible for ease of programming and powered by 4 AA batteries to make it cost effective. Stepper motors were chosen for accurate motion, and the parts were 3D printed for easy customization.

Open Source Turtle Robot Kit Teaches Beginners & Creates Beautiful Art

Tindie seller: Renier van der Lee & Vinduino

From  on the Tindie blog:

Seller Feature: Renier van der Lee & Vinduino LLC

Renier van der Lee is the father of three kids, a technology enthusiast, and a self-proclaimed “gentleman farmer,” which sounds incredibly official on its own. He is also a Tindie seller who created the award-winning Vinduino sensor, which has seen massive growth and sales both on Tindie and beyond since its inception.

Join us as we explore the history and proliferation of this unique and endlessly useful device that has a huge impact on water conservation and savings for growers.

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What is Vinduino, and How Does it Work?

Vinduino is a water-saving irrigation project for vineyards, but it has applications for all types of growers who live in drought-ridden countries. Vinduino utilizes a gypsum soil moisture sensor to accurately measure the moisture present around the roots of a plant.

It was originally designed for use in vineyards, where it can be connected to several long-range RF LoRA modules and charged by solar power. All of this is connected to the irrigation system. When the sensor detects a drop in moisture, the sprinklers turn on, and not a moment before.


The concept won the Best Product award during the 2015 Hackaday Prize, which aims to find projects that have potential as a product people would want. Vinduino was also selected for residency in the SupplyFrame Design lab.

Renier first tested his VInduino installation on his own vineyard. Prior to the creation of Vinduino, he was spending over $4,300 each year on a vineyard management company to ensure his vines were watered.

Once he switched over to Vinduino, he didn’t need their assistance anymore. Over the course of a single year, he managed to save 430,000 gallons of water, which equates to $1,925 in cost savings. The entire installation costs $635. It offers a great return on the investment almost immediately and represents a viable solution for the ongoing water shortages in California and across the world.

Tindie seller: Renier van der Lee & Vinduino

Hardware Happy Hour (3H) Chicago on June 12th

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The next Hardware Happy Hour (3H) Chicago is Tuesday, June 12th:

June 3H Meetup

Tuesday, Jun 12, 2018, 6:30 PM

Saint Lou’s Assembly
664 W. Lake St Chicago, IL

6 Members Attending

We’re doing a June 3H meetup! We’re planning on Saint Lou’s where we had many successful meetups last year. This is subject to change, so please check in before you arrive on Tuesday. We’ll be loop centric, as usual. Be sure to remember to bring the projects you’ve been working on! It’s been a few months since our last meetup, so hopefully you have…

Check out this Meetup →

Hope to see you there!

Saint Lou’s Assembly

664 W Lake St Chicago, IL 60661

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Hardware Happy Hour (3H) Chicago on June 12th