Day: July 11, 2019

Robotic Dishwashers And Dishwashing As A Service

July 11, 2019 by 53 Comments

There’s a story that goes back to the 1980s or so about an engineering professor who laid down a challenge to the students of his automation class: design a robot to perform the most mundane of household tasks — washing the dishes. The students divided up into groups, batted ideas around, and presented their designs. Every group came up with something impressive, all variations on a theme with cameras and sensors and articulated arms to move the plates around. The professor watched the presentations respectfully, and when they were done he got up and said, “Nice work. But didn’t any of you idiots realize you can buy a robot that does dishes for $300 from any Sears in the country?”

The story may be apocryphal, but it’s certainly plausible, and it’s definitely instructive. The cultural impression of robotics as a field has a lot of ballast on it, thanks to decades of training that leads us to believe that robots will always be at least partially anthropomorphic. At first it was science fiction giving us Robbie the Robot and C3PO; now that we’re living in the future, Boston Dynamics and the like are doing their best to give us an updated view of what robots must be.

But all this training to expect bots built in the image of humans or animals only covers a narrow range of use cases, and leaves behind the hundreds or thousands of other applications that could prove just as interesting. One use case that appears to be coming to market hearkens back to that professor’s dishwashing throwdown, and if manufacturers have their way, robotic dishwashers might well be a thing in the near future.

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Make A Compatible Raspberry Pi Clone – But Your Pi Must Die

July 11, 2019 by 34 Comments

The world is awash with Raspberry Pi clones that boast fruity names, but those looking for a piece of the real thing will find their compatibility only goes so far. Shaky Linux distros abound and, with a few honourable exceptions, they are not for the faint-hearted. The reason that a market hasn’t emerged for fully-compatible clones is that the Pi people seem to have a monopoly on the world’s supply of the particular Broadcom SoCs that they use, forcing would-be competitors to source the brains of their outfit elsewhere.

It’s easy to buy a Raspberry Pi SoC though, if you don’t mind receiving a Raspberry Pi along with it. So to make a compatible Pi clone for space-constrained applications, the folks at Arducam removed the SoC from a Pi 3 and designed a surface-mount module board for it, making a 40 mm x 25 mm postage-stamp style system-on-module. It’s not a Raspberry Pi, but it runs Raspbian.

Their board is not one that they will be selling, but it does open up interesting possibilities for others with an eye to creating Pi boards in different form factors. It would be fascinating for example were somebody to produce an open-source module board for a Pi SoC. Some of you might be asking why the existing Compute Module was not suitable for them; in the write-up they cite mechanical issues with the SODIMM socket.

This isn’t the first compatible Pi clone we’ve seen. Aside from the intriguing but short-lived Odroid W there was another even smaller Arducam offering that never made it to market.

A Drop-In Controller Replacement For Commercial Reflow Ovens

July 11, 2019 by 17 Comments

If you need a reflow oven, you can very easily head down to Walmart or Target and pick up a toaster oven for fifteen bucks or so. Even without any control electronics, a bone-stock toaster oven works well enough for reflow soldering, but if you want to do it right you’ll also want to add a themocouple, a microcontroller, and maybe a fancy display. That’s option one.

If you value your time more than your money, you’ll probably just plonk down a few hundred bucks for a T-962A reflow oven, the standard infrared oven that’s meant for reflowing solder. It’s a good oven, but as with all bargain basement tools from China, the user interface isn’t great. [PhillyFlyers] is working on a drop-in controller for what is probably the most popular reflow oven on the planet, and this thing looks good.

This is a controller for the T-962A oven that includes all the connectors as the stock control board. We’ve seen a few of these projects to improve cheap tools, from 3D printer controllers to a replacement board for the ubiquitous K40 laser cutter. Now the most popular reflow oven is getting the same treatment.

The specs for this replacement board include a five-inch, 800 x 480 display, powered by an STM32H7 microcontroller. All of the usual functionality of the oven is retained, but it adds the ability to hand-draw reflow profiles, save reflow profiles to an SD card, and support for four K-type thermocouples. Basically, it’s what you would expect from an upgraded version of the T-962 oven.

Most importantly, this is a direct drop-in replacement for the stock electronics. Grab one of these boards, and all you have to do for installation is break out a screwdriver. It makes a great tool even better, which is exactly what this very popular reflow oven needs.