With the current coronavirus situation, we’ve been encouraged to wash our hands regularly for 20 seconds – or approximately how long it takes you to hum “Happy Birthday” from beginning to end twice. That sounds easy enough, but do you really do this every time? What you need is some sort of automatic timer, perhaps with a dial gauge for easy visual reference.
As it just so happens, Gautam Bose and Lucas Ochoa built such a device with an Arduino Uno. The aptly named Wash-A-Lot-Bot detects a person’s hands in front of it via an ultrasonic sensor, then ticks a dial timer from 0 to 20 (or rather 20 to DONE!) using a micro servo.
This simple setup can be made with little more than scissors and tape, making it a great way to learn about Arduino and programming while you’re stuck indoors.
In the past I have developed various projects of ammeters based on Hall effect current sensors such as the ACS712, or on High-Side Current-Sense Amplifiers such as the MAX4080SASA or made with operational amplifiers. All these systems have an analog output which must then be digitized. The INA226 sensor has a digital output and incorporates a 16-bit ADC for which a high accuracy and precision is obtained.
Whether it’s with an old friend or new acquaintance, we’ve all had those awkward gaps in conversation. Do you speak next, or let the other person lead the discussion? If that’s not happening naturally, then SASSIE, or “System for Awkward Silence Solution and Interaction Enhancer,” is here to help.
The cylindrical device detects audio feedback via a pair of microphones positioned near each person in a conversation. When a sufficient silence is detected, SASSIE pops a flag out and rotates to indicate who needs to talk. If that wasn’t enough of a hint, it also audibly tells that person to say something.
SASSIE is powered by dual Arduino Uno boards, one of which takes care of the bulk of the control functions, while the other actuates the stepper to spin the top indicator.
What does one do with over 1,000 LEDs, white acrylic, and 288 IR sensors? If you’re Redditor “jordy_essen,” you create an interactive light panel.
In one mode, the user pull a reflective tool across the sensors to draw a paths, with potentiometers implemented to select the color. It can also be set up to play a sort of whack-a-mole game, where one has to activate the sensor in the same area where it illuminates.
For this amazing device, jordy_essen uses not one, or even two, but six Arduino Mega boards to drive the LEDs directly — in turn controlled by a webpage running on a Raspberry Pi. If that wasn’t enough hardware, an Uno is tasked with taking inputs from the color potentiometers.
To help individuals work remotely and share their designs with team members, we’re providing a free three-month upgrade to the Arduino Create Maker plan to all 1.4 million users of Create as well as new subscribers to the service. With Arduino Create everything is ready to go; there is no need to install libraries and you can quickly share your sketch with teammates via just a URL.
To gain your free three-month upgrade* all you need to do is go to Arduino Create choose the “Maker” plan with the default monthly option and enter the voucher code “CREATE4FREE” during the purchase process.
Arduino Create enables users to write code, access content, configure boards and share projects. Features such as an always up-to-date online IDE and the ability to share builds and receive feedback from other facilities means you can work from home efficiently and effectively. If you don’t want to start a project from scratch there’s always the option to tap into the power of the community on the Arduino Project Hub by browsing projects and making them your own.
The ‘Maker’ plan comes with the added benefits of up to 250 sketches allowed in your sketchbook along with 200MB space to store those sketches and libraries. You can manage more connected objects (five ‘things’) with up to 20 properties per ‘thing,’ enabling the development of complete IoT solutions. Automating processes remotely is further enabled by the Maker plan including access to set up and remotely control 5 of each cloud enabled Arduino board, three cloud-enabled Linux devices, and one cloud-enabled generic third-party board.
Find out more details about Arduino Create and all the features included in the Maker plan here.
*The ‘free 3-month upgrade to Create Maker is applicable to the monthly plan and is limited to new subscribers only. Voucher code “CREATE4FREE” expires June 30th, 2020.
Please note the first monthly payment will start three months after you purchase the plan, and you are able to cancel your subscription at any time.