Active STEM learning with evive

The world is shifting towards new ways of learning, with rote bookish learning being phased out in favour of learning-by-doing. STEM (Science, Technology, Engineering and Mathematics) education is particularly benefiting from this movement, with students being able to learn by experimentation and unleashing their creativity. Getting students to actually experience the concepts that they are learning about makes much stronger impressions on their mind and facilitates improved learning.

evive is a self-contained prototyping lab which gives students all the tools they need for learning about circuits, building robots, and tinkering with all the objects around them. The idea behind evive was to make learning and building quick, intuitive and affordable, and we have done just that with the on-screen menu interface that gives easy access to all of evive’s functions without the need to reprogram the microcontroller for repetitive tasks. Students can learn at home by referring to a multitude of projects on the internet and connecting with the huge Arduino support community online. Features like the plug and play hardware interface make building and driving robots easy and fun, while the robust circuitry inside evive makes sure that they can try out their ideas confidently, without fear of failure. With programming skills becoming essential and interactive graphical programming environments like Scratch on the rise, evive’s Scratch compatibility allows the students to make programs graphically without worrying about syntax, and see their code actually interact with the physical world.

scratch

Be it building a toy car and controlling it from their smartphone, or making their own piano, evive enables students to get their hands dirty, build complex systems and program it, all within minutes! Students can learn the basics of electricity and electrical current by measuring voltage drops and current flow with evive, visualising it in real time using the mini-oscilloscope functionality. The best thing about evive is that when implementing their ideas becomes so easy and convenient, there is no limit on what the students can dream up and implement.

Introducing students to the world of electronics and robotics requires a humongous amount of investment in infrastructure, components and space. evive solves this problem by packing all the components they will need into a small, portable unit. It comes with learning modules like toy car, robotic arm and home automation kit which are easy to use Do-It-Yourself kits that serve as great examples for the students to start with. Complemented by these learning modules, evive offers an end-to-end active STEM learning solution which can be deployed with great ease. We are creating a huge base of video tutorials and documentation of projects that can be reproduced easily using evive, which will serve as a source of ideas for students and will help educators to create content for their curriculum.

You can learn more about evive here

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Precision sensing with evive

While making projects and doing laboratory experiments, we often need to capture the response from sensors or measure voltage drops across circuit elements for the purpose of debugging. Measuring current flow through components is a must for design of efficient power circuits.  We use a variety of instruments like voltmeter, multimeter (DMM), oscilloscope, data acquisition modules, etc. When we need to program and control devices with sensor feedback, Arduino and BeagleBone are frequently used as they are very cost effective and easy to learn platforms. However, their sensing interfaces are very primitive with very low resolution and small range ADCs. The alternative is buying an oscilloscope, which is like bringing an automatic gun to a handgun fight! Oscilloscopes are expensive, bulky and loaded with features that most researchers, let alone hobbyists, never end up using. Clearly there is a huge middle ground here which needs, and deserves, to be filled. 

evive gives you a great new way to test your circuits, without needing expensive equipment like oscilloscopes, function generators and data acquisition modules. We have integrated Analog Devices’ 24-bit isolated ADC chip ADE7912 into evive, giving it precision sensing capabilities for IoT, lab testing and debugging. While Arduinos AVR ADC takes 112us for sensing 0-5V data in 10bit resolution, evive allows you to measure 24bit resolution data in less than 15us, with an accuracy of 3mV for +-5V range, and 10mV for +-30V range. Like any oscilloscope, evive offers two channels for simultaneous measurements, with one channel being optimized for voltage measurement in the 30V range and the other being optimised for both current measurement upto 3A and voltage measurement in the 5V range, with a jumper deciding which measurement is done. The ADE7912 was chosen since it offers an isolated power supply, which allowed us to completely isolate the measurement circuit from the rest of evive, allowing you to measure voltage and current from any circuit without worrying about creating ground loops or inadvertently shorting the probes. When combined, the ADC and evives screen make a formidable mini-oscilloscope, with multiple modes of display and ranging the axes of the oscilloscope. The display can be triggered in single, scan and auto modes. The voltage division can be scaled from 20mV to 10V at the press of a button, while the time division can similarly be scaled from 2.5ms to 1ms. evive also allows you to set cursor offset for making measurements onscreen, adjust both channels offsets independently and change the level of the trigger with the on board Joystick.
Apart from viewing the graphs on the TFT screen, the data can be logged into the SD card with timestamps provided by the on-board real time clock or can be sent over serial communication. Also our LabVIEW interface allows viewing the graphs on your PC/Mac in real time via a serial USB interface.
evive data log serial
With the rapid growth and proliferation of Internet-of-Things and big data, lots of sensor network data is communicated to the cloud for a huge number of applications like weather monitoring, precision agriculture, pollution monitoring and tons of DIY hacks. With inbuilt adapters for Wi-Fi (ESP8266 ESP 12-E), RF (Xbee) and Bluetooth (HC-05), evive is IoT ready and can communicate with the cloud and other devices, with its portability making it ideal for deployment for data collection and experimentation.
Evive’s 24 bit ADC, 1.8″ TFT screen, SD card support, real time clock, serial communication capabilities and menu interface make evive a revolutionary new player in the data sensing and logging arena.