Maker Faire 2014 for an Electronics Maker

This is the third year I am going to the faire, and every year it gets bigger and better. With all the MTA metro work on the weekends its always a challenge to get there, but once you reach the New York Hall of Science it’s like entering Willy Wonka’s chocolate factory ! filled with creativity, Robots, Drones and Mentos Fountains making it a geek paradise.

The flag....we are proud of...

The flag….we are proud of…

The intel Edison

The intel Edison

I feel the main highlight was the talk by Jim Chase, the product manager for Intel Edison. Intel is changing the way people look at Iot(Internet of Things) devices with their new Edison platform. A single tiny board computer that runs YOCTO Linux (YOCTO is also IP friendly) on a dual core 500 MHZ processor along with a 100 MHz MCU for real-time operations which is also equipped with Bluetooth 4.0, 1GB ram and 4GB of onboard eMMC memory. But, Intel did not stop with that. They added onboard wifi (FCC certified) and are also launching a cloud infrastructure for all their Iot devices. This would enable companies to directly buy Iot cloud services and cloud analytics from Intel. The Edison is also designed to be fit into products and the company now partners with design firms that can incorporate the Edison into a product design.

the Hat

the Hat

According to James Adams of the Raspberry pi foundation, more and more companies are looking to drop these single board computers into their products . Pi has therefore also come up with compute modules that can directly integrate into products. Like the shields from arduino and capes from BeagleBone, Raspberry pi comes up with its very own ‘HATs’. These HATs come with an interesting feature that enables the pi to auto the HAT and configure its hardware settings to work with that HAT.

There were a few interesting presentations from the BeagleBoard foundation highlighting the PRUs available on the BeagleBone black and the Arduino Tre Project. The PRUs are microprocessors/co-processors that are connected to the main CPU for on the beaglebone for I/O expansion. There are two PRUs available on the BeagleBone black that run at 100Mhz. Using BOTSPEAK you can program scripts to run on these PRUs for time critical operations. Unfortunately, these PRUs do not support interrupt modes but offer a very low latency and are completely real-time since they have no overhead from the CPU or the OS.

Moving on, Belkin is going all in for the Maker community .With their WeMo maker you can now connect your toaster to the internet or program your dryer to send you a message. This pro-hacking WeMo maker has one digital input (TTL 5v) and a controllable relay contact that supports a load up to 24 watts. For their next version, they have promised more I/Os and an ADC. The current version is expected to launch on October 15.

there are cute :)

there are cute 🙂

Apart from all these presentations and talks, the Makerfaire was overflowing with interesting projects and ideas. Robotis came up with their mini humanoid robots and smart servos that make building robots easier. These servos cost around 20$ and you can cascade up to 24 servos on one channel and address them independently by using just 3 wires.

Kettlebug has a new fitness tracker that can monitor the activity of your kettlebell and tell your instructor if you are not doing enough squats ( or may be that was just for me). It was also interesting to see the FirstBuild initiative by GE and Local Motor where you can post ideas for Green technology and GE/Local Motor would build it for you. Interestingly, you also get a royalty for every device sold. The Green Bean project which is a hardware platform that talks to a proprietor GE RF link embedded in all the new GE appliances for diagnostics.

The green Bean   source:

The green Bean source:

Another Interesting product from Carbide Labs was the Pick ‘n Paste machine. This machine applies solder paste, picks and places passives that are up to 0603 packages and ICs with a 0.8mm pitch.



This was the year of Iot devices! The Linino board from the makers of Arduino Yun makes it easier to connect your project to the internet. The we-io is another board for Iot, but it runs a powerful WRT Linux. The DFROBOT and TAH provides BLE solutions for Iot. Anniken BLE shield for arduino has a powerful UI interface for app development. They was also a few new players to the single board computer like UDOO, Humming Board, Wand Board and RIoT Board


I-robot 🙂

Life sized 3d printed humanoids from InMoove were really cool and so was that big 3d printer that printed flower pots.

3D printed vase

3D printed vase

A giant 3D Printer

A giant 3D Printer

Dancing Ferro magnetic particle from CHOREOV, and their choreographic algorithms that turn music to dance.


you printed!

You could also get your figurine built using the SCAN-A-RAMA .Ultimaker had their launch deal where you would get a free 3d doodler. m3d was selling its desktop 3D printer for 349$.

If you came looking from some high voltage projects, OneTesla was hiding in the kickstarter farm with their singing tesla coil.


Delta smart faucet

Delta was showing off their innovative faucets and toilets that never get clogged. Brain wave generated music by Lisa Park was another crowd favorite.

Brain wave music

Brain wave music

Around 6pm I finally got time to grab lunch. All in all, it was a day well spent and now its time to MAKE…!!

vend a tweet!!

Just got done with the twitter enabled vending machine at Lowell Makes. Twitter has always helped people to connect to the world, and there is no reason our vending machine at Lowell makes should not have a twitter account. With some awesome Bash from @leftyfb and my pet python ,Tweetmachine now looks out for your tweet and vends out a 3D printed toy for every tweet. check out our cool demo and come over to lowellmakes to play around with the tweetmachine. You can find our code here; more improvements coming soon.

photo 1 photo 2


Day at the MAKERFAIRE 2012

I was super excited to meet all the wonderful, talented and creative makers from all around the world. here are a few of the photos from my trip..

I think maker fair was more about 3D printers this time, they even had a 3D printing farm, Make 3D and a lot of exhibits  on 3d printing and few on shop bot( bot which works on wood). Make also introduced their new Replicator2 the new maker bot from MAKE. they were a lot of goodies from PJ tools and Xprotolab (20$ oscilloscope + logic analyzer . I was quite amazed with the Xprotolab, tiny little oscilloscope and logic analyzer that can fit on your bread board, i did like the I2C logic analyzer it gets rids of all the waveform and shows your the raw data..not bad for a 20$ oscilloscope.

Make also gave away a free edition of the make magazine, in the MAKE stall. I also got to meet PETE from spark fun electronics who does according to PETE, a very friendly guy!!

here we go…

The most innovative make bot ever, and i luv the precision. the B9 creator

Arduinos cant get any bigger…I was happy to hear about the new arduino with the ARM cortex M) now we can play music with the the DAC on chip (it works… saw him do it) and has a debugger and USB host . Loved the speech by ALF the mastermind behind the AVR architecture.

i had always see this on you tube…non Newtonian fluids

and there was light…lots and lots of LEDs

That is eben from raspberry pi, a very inspirational talk, on how he can afford to make and sell raspberry pi made in Wales,UK for 35$.

Me with the Co-Founder of Arduino project, a man with a big heart for opensource….

PETE from sparkfun very humble and friendly…

the Metro card Robot, turned a lot of heads…

This tiny robots are really cute..

and there was music..

and a free 3D-MAKE magazine…

firefox@makerfair to introduce the new webmaker

i did buy a T-Shirt got a few stickers from sparkfun…took the train to times Square…

God bless america….(thanks for reading….)

luv the the MakerFaire and u T….

System call explained

I recently got stuck with this problem, when i do a system (“/bin/mytestexe -s 13”)call. it  would return a 100 insted of a 1, many forums do give a lot of vague explanations why this happens. the the answer to this problem can be found in the WAIT.h file. If you go thorough this file we will get to know that. The return is 4bytes long not 8…
2byte code return, 2 byte execution info
1) bytes code return:
It shows the value my code has returned. my function (executable) used to return a 1. this makes the output 100.

2) bytes execution info
It shows the info of the command, for example the compiler could not find “/bin/mytestexe” it would return a 127 error if it cant the the file. Refer (sys/wait.h) for more details efinisions of the error codes.

Nice work

I hope this is not animated, and if it is not animated, its a really really awsome Halloween project..check out the video…

New Blog…on MSP430 soon…

Finaly after a month of travel…i am back to mumbai, and i am working on a new blog/tutorial on how to get started on MSP 430xx family of Microcontrollers…they are ultra low power controllers! and TI gives free samples 🙂 all u need is a MSP Launch pad by TI which is just 4$…also check out this cool video from TI..showing how a controller can be powered from GRAPES :-O

There is a lot of Forums an wikis which will help u get started in no time…

data logger !! that is easy!!

Many of my students keep asking me, how can I make a plug and play device like a pendrive, well in defiantly not very easy, I will give you two easy ways to do the same, it a easiest is… using a Easyusb module by daniel brodani..documentation is available on a very simple module but the storage is limited to 2 MB, but its quite ok for a dataloger! .txt files are usually less than a KB. The interfacing is quite simple, it has UART lines TX and RX, connected them to your controller, go through the data sheet you will find commands to make a new file and write data, once the data is written u will see the file when u plug it in.

The second not so easy method to make a SD/MMC card data logger, to write the code on your own you need to have a clear understanding of SPI communication and FAT32 by windows, i was amazed initially to find out memory cards use SPI protocol! for all the newbies out there the is and AVR fat library which you can use! They also give sample code downloads for AVR, PIC and 8051. If you are comfortable working with Arduino, there is also a Arduino FAT libraryhere which is much simpler to use…and for all the lazy geeks there sparkfun had made a nifty micro SD card logger OpenLog using the arduino FAT library and its only 23$ add USB compatibility to your projects now!..happy datalogging!!

Arduino buzzz!!!

Arduino? not heard of it!! its not as crazy as it sounds in a very simple development environment using Atmega8, our friends at arduino had made a amazing IDE with a vast library they have functions for everything including SPI, I2C or even every complex algorithms for Ethernet chat client!! and making it more easier the coding is in C++…and the most exciting part, its completely open-source! is a very good place to get started but i have also put up a tutorial on instructables on arduino…just follow the easy steps and in no-time you will have your very own arduino…even for those creative bugs out there…try to get hold of a Lilly pad…you can have a nice LED display on your Ts for Christmas…check out the video below for IDEAs!!

Hello world!

hi! guys hey its me sajin! i am back with my blog!! it was down for a while! i was doing my project for a while, it was fuzzy e-farming system, u can see all about it here. so i am back to wordpress, i just like the interface here! its better than blogger. mean while i did a tutorial on instructables. its become a featured Instructables in 2 days, with 1000+ visits. i am also trying to get my hands on TIs EZ430 chronos…it is an amazing watch to learn about MSP430 or CC430 micros. and for all those peopel out there who is bored and does not know wat to do watch these videos. it is an amazing channel on electronics, help to to understand the theory in electronics.

when i first started into electronics i thought it was all about making stuff, and the theory is not “very” essential! but making my project had to go through a lot of basic theory, lots and lots of it, about current, voltage and lots of stuff like tat! how many of u actually know where to use a Mosfet and where to us a BJT or wats with JFET? or what is an SCR, ya we learned all that in or class! who remembers! but if u really want to get into making things start with a resistor! again…and go all the way up! microcontrollers comes last!! dont miss out on the basic and make a circuit with a nice with big processors!! it wont work!!(it should not work).

also for those who are not into electronics and still want to make stuff…visit or my instcuctable its any an easy way to start…

tada…cya later guys!