Order Drinks With Your Mind

Barbots are a popular project around these parts. With a few pumps and a microcontroller or two, it’s possible to build something that can approximate mixing a drink. If you’ve got the patience and attention to detail, you can probably even get it to the point where it doesn’t just end up as a leaking wet mess on your mantlepiece. [Robert] has taken his build a step further by adding mind control.

To achieve this feat, a Mindflex EEG headset is pressed into service. This picks up brainwaves from the user, and processes them into two output values of concentration and meditation. Through some careful hacking, it’s possible to retrieve these values. [Robert] sends the values over Bluetooth to the barbot controller for processing. Concentration values over a certain threshold are used to cycle through the drink selection, while meditation values are used to confirm the order. Once it’s made, a voice command to “hit me” will see the drink served.

It’s a tidy build that adds a bit of fun to an already cool project. We’d love to see this taken up several levels of complexity to the point where you can directly order the drink you want, just by the power of thought. If your university-grade research project is at that level, be sure to let us know. Else, if you’re interested in how the barbot came to be, check out [Robert]’s earlier work.

 

DIY Peristaltic Pump Keeps the Booze Flowing

A few months ago we showed you a bar bot built by [GreatScott] that uses peristaltic pumps to food-safely move the various spirits and mixers around behind the curtain. The bar bot uses three of them, and at $30 each for pumps with decent flow rate, they added a lot to the parts bill. These pumps are pretty much the ideal choice for a bar bot, so what do you do? [GreatScott] decided to see if it was worth it to make them instead.

Peristaltic pumps are simple devices that pump liquids without touching them. A motor turns a set of rollers that push a flexible tube against a wall. As the motor turns, the rollers move liquid through the tube by squeezing it flat from the outside in turns. Typically, the more you pay for an off-the-shelf peristaltic, the higher the flow rate.

[GreatScott] figured it was cheaper to buy the motor and the control circuitry. He chose a NEMA-17 for their reputation and ubiquity and a DRV8825 controller to go with it. The pump is driven by an Arduino Nano and a pot controls the RPM. After trying to design the mechanical assembly from scratch, he found [Ralf]’s pump model on Thingiverse and modified it to fit a NEMA-17.

The verdict? DIY all the way, assuming you can print the parts. [GreatScott] was trying to beat the purchased pumps’ flow rate of 100mL/minute and ended up with 200mL/minute from his DIY pump. Squeeze past the break for the build video and demonstration.

Is there a bar bot build on your list? No? Is it because you’re more of a single-malt scotch guy? Build a peristaltic pachyderm to pour your potion.

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Open Source Barbot Needs Only Two Motors

Most drinkbots are complicated—some intentionally so, others seemingly by design necessity. If you have a bunch of bottles of booze you still need a way to get it out of the bottles in a controlled fashion, usually through motorized pouring or pumping. Sometimes all thoe tubes and motors and wires looks really cool and sci fi. Still, there’s nothing wrong with a really clean design.

[Lukas Šidlauskas’s] Open Source Barbot project uses only two motors to actuate nine bottles using only a NEMA-17 stepper to move the tray down along the length of the console and a high-torque servo to trigger the Beaumont Metrix SL spirit measures. These barman’s bottle toppers dispense 50 ml when the button is pressed, making them (along with gravity) the perfect way to elegantly manage so many bottles. Drink selection takes place on an app, connected via Bluetooth to the Arduino Mega running the show.

The Barbot is an Open Source project with project files available from [Lukas]’s GitHub repository
and discussions taking place in a Slack group.

If it’s barbots you’re after, check out this Synergizer 4-drink barbot and the web-connected barbot we published a while back.

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Drinking with your Robot

We’ve seen tons of bartending robots before, but we’re not sure we’ve ever seen a robot that actually drinks with youUntil now anyway.

Designed and built by a South Korean inventor, [Eunchan Park], he built this robot to drink with, quite literally.

The story goes that he tried drinking alone in 2012 because he did not have a girlfriend at the time. He didn’t enjoy drinking alone and promptly stopped. But then recently he tried drinking with two glasses on the table, and cheers himself when drinking. According to him, the alcohol tasted much better that way, which drove him to build Drinky, the Alcohol Drinking Robot.

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In Soviet Russia, Drink Serves You

There’s just something about having an automatic bartending machine that screams “we’re in the future now” — and it’s a future we approve of. This project is called the Alkomat (Google Translate), and it’s a handy little machine capable of mixing drinks for five people at a time.

Inspired by the RumBot, [Strn] wanted to practice his hand at hardware integration and product development from idea to creation — and just looking at some of the photos of this, he did a damn good job.

On the inside of Alkomat is a recycled inkjet XY carriage which can index on each of the five drinks. A series of four tubes feed up to peristaltic pumps that provide alcohol from the bar rack. Once he had the hardware sorted out and operational, he set out to make the machine look as presentable as possible. Using a mixture of counter-tops and laminated wood panels from furniture, he’s boxed up the whole thing and made it look like something you might actually be able to buy from a store — maybe IKEA?

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Margarita Drip Infuser Ensures a Perfect Mix

In order to get a margarita just right, the various ingredients need to be mixed together quite vigorously to over-come the different viscosity of the fluids. Looking to create his own barbot of sorts, [TVMiller] decided to make a Margarita Drip Infuser to help make margaritas a bit easier.

Using various chem lab supplies, [TVMiller] has cobbled together something pretty awesome. The Infuser can take up to 8 different ingredients into its test tube reserves, and after the drink ingredients are programmed on the computer, the magic begins.

An Arduino Uno controls a bank of 8 relays which control small fluid solenoids, with each control pulse releasing just a single droplet of fluid. An LED for each valve is run in parallel adding a bit of a light show to the mixing experience. If that’s not enough, he’s also created a copper cooling coil to chill the drink as it is poured.

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Arduino Drink Dispenser Turns Quarters into Liquid Courage

Ever feel the need to have your very own alcohol vending machine at home? Well if you do, [Ben] and [Dan] have just the Arduino based machine for you!

It was actually part of a school assignment for product design at Brunel University – the whole thing was designed and built in just over a week. The machine accepts and counts coins giving you a total readout on the LCD screen. When the correct amount is inserted you can select your shot and the machine will pour you a stiff one.

The thing we like about this vending machine — we’re not sure if it actually qualifies as a barbot — is that it doesn’t have any fancy pumps. In fact, it just uses two inexpensive solenoid valves and gravity to dispense the drink, much like a typical bar bottle dispenser.

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