Retro Arcade

...Old School...

While arcade emulators aren’t exactly unique, they’re tons of fun, and that essentially is what drove Gursehaj to build one at Maker’s Asylum Delhi. He says the idea popped in his head on a recent trip to Mumbai, when boredom led to a friend and him to go watch Pixels. Watching the retro-inspired imagery on screen, he decided to build an arcade emulator as soon as he got back to Delhi. Which is exactly what he did.

He teamed up with his friend Akshay, and showed up at the Asylum with a bag full of components. The heart of the machine is of course a Raspberry Pi, running an image of RetroPie. That particular combination lends great flexibility in terms of gameplay, by allowing multiple consoles to be emulated. We used the laser cutter at the Asylum to cut the plywood that was to be the housing for the electronics. I designed the case while Utkarsh pieced it together. Meanwhile Akshay and Sehaj worked on the code, and getting the Pi to behave.

To make it look sleek, we painted the entire thing black, and added lights inside an 8-bit cutout on top. Of course you can’t have an arcade without the buttons and controllers, so we made a trip to Chandni Chowk to procure those as well. A week of tinkering and tweaking later, we have a beautiful fully-functional retro arcade, and people have been going nuts over Mario & Donkey Kong (not that those are the only things you can play). The total cost came to about Rs 5000 INR, which includes the Raspberry Pi, the buttons & controllers, the plywood and the lights. We do have plans to keep adding to this arcade. Some of the ideas we’ve discussed, include: • External controller support • A phone charging station • Aux ports So if you’re ever in the mood for some good old Pac-Man or Donkey Kong, drop by the Asylum, and have a go at it.

• Date: 2016-02-23

Playing with Analog Circuits

Electronics

With the prevalence of Arduino and easy to use micro-controller platforms, people often overlook analog circuits. Me and my friend Karmanya wanted to make a completely analog version of a common digital circuit and given Karmanya’s predilection for LEDs, we decided to make a VuMeter. A VU meter represents the amplitude of an incoming audio signal, mostly for aesthetic purposes. The heart of the circuit is the LM3914 display driver. The driver takes input in the form of a signal from 0-5 Volts and represents the amplitude of the signal in either bar or dot form. The chip also regulates current to the LEDs which reduces the number of resistors or other components in the circuit as the entire circuit can run off any 9-12V supply.

In this circuit a LM3914 driver is connected to 30 leds, with 3 parallel leds connected to each pin. The leds themselves are of the ultra bright variety and their light gets diffused through the drinking straws. A potentiometer between pin 7 on the chip and ground controls the current supplied to each led.

We used an opamp (AD620) to amplify the signal from the audio jack (~200mV peak to peak) and bring it between 0-5V which the LM3914 required. The advantage of using an AD620 or LM386 is that they both require only a gain resistor between pins 1 and 8 to manipulate your opamp gain. Going by the datasheet of the AD620, another potentiometer was used so that different sources (phones,laptops etc) could be accounted for.

• Date: 2016-02-23

Telenoid

Teleoperate Humanoid Bot

We see a lot of humanoid robots being made in order to replace humans in different circumstances, for example in a war zone and in dangerous factories. This is amazing but there is an issue which hasn't been looked upon and that the robots that exist today are very clumsy and need a trained personnel in order to be operated or have controllers.

What if you can control a full human sized robot from a distance and there is no need of a controller and you don't need to be trained in order to use it. Well the solution is Telenoid (Teleoperated Humanoid Bot), this bot is a full size humanoid bot (currently under development) which can be operated using your own actions and gestures.

The bot consists of a camera which tracks human motion and imitates the motion. The bot can be controlled from far off distances using satellite communication for instance in a war zone. Due to motion tracking human senses are somewhat copied to the body of the bot and the bot will react the way you will in a war zone which will help to increase the response time to a situation as compared to other remote controlled bots. “ Shortcut to the FUTURE ” !

• Date: 2016-02-24

Sprite

Clear Hai ?

Sprite is a advanced traffic management system that helps in solving 3 major problems of traffic . Providing way to vehicles in emergencies such as ambulances, firetrucks etc. Saving fuel, and Traffic congestion.

Description : Sprite uses a specialized hardware control to control traffic lights in emergency situations . It can toggle traffic lights from red to green in emergency situation depending on some parameters . Sprite is well connected to your vehicle . It can show you traffic on your car dashboard and can tell you to switch off your engine if traffic lights is more than 1 minute OR traffic is bad .

Technologies Used : python, embedded device, Qt (cross-platfrom) framework, Android, JAVA, C++, QML, JS, PHP, Django!!

• Date: 2017-05-30

Alexa To Boeing

Experience ATC

Overview : Going by the problem statement given by C2 Technologies to make common people experience ATC ( _ Airline Traffic Control _ ), we have built a smart solution using Amazon's Smart Voice Service, Alexa.

Explanation : It uses Amazon's Echo Dot 2 as an interface for voice, which is an imitation of the communication that takes place between the ATC Controller and Pilots during the course of flight. It also displays a Radar Screen showing the important details of a flight's course. User can command planes to _ climb, descent and change its direction _ in order to avoid collision. In case, a collision occurs an alert is generated on user's screen.

API : If the type is ![POST] you are expected to provide x-www-form-urlencoded data in a _ JSON blob _. If the type is ![GET] then obviously, you don't need to do anything. /api/getAltitude - Get Flight's Altitude /api/getDirection - Get Direction with respect to NORTH /api/setAltitude - Set Flight's Altitude /api/setDirection - Set Direction with respect to NORTH /api/getAllFlights - Get Details of all flights in radar's range

• Date: 2017-05-30

Positio

Its Position without 'n'.

Working : There are 2 IR sensors that will be attached in a vertical line at a good distance. Due to this we can detect whether the person is sitting straight or not. If the person is sitting for a very long duration in the wrong position, it notify the person via app to sight in correct position. See the images to get a more clear image of how it is working.

Built With : 1. Python 2. Swift 3. PHP 4. Arduino

Try it out: https://github.com/Gursehaj/Positio-Backend

• Date: 2017-05-30

Surface

Make Any Surface Smart

What it does : It has a potential to make any kind of surface smart. It uses an advanced knock detection technique and also distinguishes between a knock patten and something thrown at it . How we built it : The brains of Surface are handled by INTEL EDISON, which makes it a IoT Enabled device. The knocking of the sensor is detected via an Accelerometer and as usual alot of coding makes it a potential market product.

Challenges we ran into : Detecting the knocks out of accelerometer was a big challenge and then distinguishing the patterns. Accomplishments that we're proud of : Achieving those knocks on the surface precisely and for a very vast distance is a commendable accomplishment we made.

Built With : 1. Intel-edison 2. Pytho 3. PHP 4. Android 5. Accelerometer 6. Ifttt

• Date: 2017-05-30

Autonomous 2D mapping Bot

Map the World

An autonomous bot which check its surrounding and creates a virtual map, so that map can be used to derive valuable data such as area where humans can’t go. A fully autonomous robot can: 1. Gain information about the environment 2. Work for an extended period without human intervention 3. Move either all or part of itself throughout its operating environment without human assistance 4. Avoid situations that are harmful to people, property, or itself unless those are part of its design specifications

1. The rotary encoders will tell the relative position of the bot from where it started moving. 2. The IR sensors are used to 2D map the surroundings. 3. The IMU sensor tells the direction of movement.

This bot can be used to map places where humans can't reach or endangers their life like debris after an earth quake, dark underground tunnels etc. However this can also be used to map areas inside public buildings so blinds can take advantage of it to easily move inside the building.

• Date: 2017-05-31

The Hulk

Automating Agriculture

A picture is worth a thousand words. Please wait as I get the documentation ready for this project.

• Date: 2017-08-26

Knowledge is Power

Teaching Students

A picture is worth a thousand words. I have taught over 1500 students be it in schools, colleges or at Maker's Asylum.

Have taken classes on Arduino, basic electronics, Matlab, OpenCV, PCB Designing, Autodesk Fusion 360, Raspberry Pi.

I personally feel that knowledge should be shared with these young minds to shape our world and let future bright minds start a bit early on their journey.

• Date: 2017-08-29

Autodesk Speaker Kit

Fusion 360

This kit was made for Autodesk's stall at Digifest Rajasthan in Udaipur. The assembly of the speaker are just six simple steps. 25 kits were prepared with a bit help of Canvas of Dreams.

The speaker was designed on Fusion 360. Design was such that the two speakers were like eyes and 3D printed eyebrows can be applied on top of it to give the speaker an expression.

I used 4mm plywood. The design was laser cut using Adobe Illustrator. Every single piece was then given a coat of varnish to make it look dark in colour. A simple and elegant design was added in front with Autodesk and Fusion 360 logos for branding.

• Date: 2018-02-01

Raah

Lead the Way

The blind know whats in front of them with the help of their stick but they don't know where to go. They have to either ask someone each and every time or someone needs to hold their hand and take them to their destination.

Raah is a smart belt which acts as a navigation helper to the visually impaired through haptic feedback. It uses data from MPU 6050(Gyroscope, Accelerometer and Compass) in conjunction with google maps and tells the user in which direction to go via haptic feedback.

Since it has accelerometer in built, the belt can tell whether the person is walking or travelling in a vehicle.

• Date: 2018-02-01

Worky

Table for Co-Working

This was one of my biggest freelancing projects. The table is a conventional looking wooden table but has tons of features which are helpful for a co-working space and even for an office.

The table consists of a reading lamp, biometric locked drawer, wireless charging, a tablet, laptop stand and plugs for charging your laptop. The table also has ultrasonic sensors at the bottom of the table which collects data for how long the person was sitting at the table.

The tablet runs a custom app which can be used to store user's notes, can order uber or place order for a coffee or for things on Amazon. When the person logouts from the tablet, all the notes are stored online and if the person login to another table, his/her notes are fetched from the cloud.

• Date: 2018-02-01

Wifi Lock

Magnetic Lock

You have a glass door and want it to be accessed from anywhere around the world. A simple circuit consisting of ESP32 controlling a relay.

The board is connected to your local wifi and using an app you can lock or unlock your door from anywhere around the world. The lock also has a functionality to unlock the lock from inside the room.

The size of the is designed so small that it perfectly fits inside the traditional magnetic lock.

• Date: 2018-02-01

8 Channel AC Dimmer

Control your Home

An eight channel module which can control the speed of an AC fan or brightness of an AC bulb. Every channel is capable of handling 300 Volts at 15 amps.

The board is designed in such a way so that it can fit inside a conventional eight module switch board which is very common in offices.

The board works with ESP 32. It connects to a local wifi and can be used with Google Home, Amazon Alexa and other voice assistants.

• Date: 2018-02-01

Freelancing Card

Everyone needs one

The colour scheme of the card matches my website. It contains all the essentials required by someone. The design was done on Adobe Illustrator.

• Date: 2018-02-25