Author Archives: Shantam Raj

About Shantam Raj

Currently I am a final year B.Tech undergraduate majoring in “Electronics and Communication Engineering” from IIT Guwahati. I am passionate about electronics and robotics. Apart from that I love writing, visit https://medium.com/@shantam_raj for some of my works. I am a die hard soccer fan. I also love to play badminton. I am a hardware hacking enthusiast and a tinkerer !!.

Why are RF PCBs usually 4 layered?

There are RF based PCBs that are 2 layered too, I accept that but we are not talking about them here, although the answer is simple and universal to actually apply to 2 layered PCBs too. On Google you will … Continue reading

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1.8V or 3.3V ?

Is it better to run CC2650, CC2640, CC1350 or CC1310 SoCs from Texas Instruments keeping in mind ultra low power and utilizing energy harvesting at 1.8V (but consume larger current) or at higher voltages (like 3.3V ) but consume lesser … Continue reading

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Batteryless Bluetooth Beacons update 2

So, I have been making steady progress with the project. Here are some pictures of the latest stage and some videos showing the Power Management in action. The board has been tested with simple blinky program and a BLE program … Continue reading

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Batteryless Bluetooth Beacon Introduction

Its been a while since i have put up a blog post. All this time i was busy with my next project, a batteryless bluetooth low energy based device. Here is what the prototype looks like (only the BLE part). … Continue reading

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Self Sustained Wireless Sensor Node for IoT

Finally after through testing i stacked all the modules on top of each other and…… boy, don’t they look pretty 😛  (video coming soon!!) Visit the Hackster.io project page or my GitHub Project page to access the schematic, layout, Energia … Continue reading

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Energy Harvesting Shields for WiFi Micro – Part 2

I finally received the components form element14 and in a couple of days i also soldered the ics and the passives etc and did some preliminary tests. I am delighted to tell you that the preliminary tests were a success. … Continue reading

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Energy Harvesting Shields for RedBearLab’s CC3200 WiFi Micro

A little while ago i got really interested in ultralow power applications and Energy Harvesting. After researching for a while i chose to do some projects that exploit energy harvesting. For my parts selection i decided to go with TI’s … Continue reading

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Panelizing and Gerber generation in Eagle

I have been working with Eagle for quite some time but never really got a PCB manufactured. almost all the time i used the toner transfer method to make homebrew PCBs. But then i took a project in which i … Continue reading

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Sensor Hub Update

Finally my design arrived. Take a look ->     Apart from the sensor hub i had made 3 other different circuits in the same panel.(Check my Eagle post on how to do that) like this – This was the … Continue reading

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Running CC3200 on LiPo using TP4056

Looking at the User’s guide its quite clear that you can run CC3200 on 2xAA or 2xAAA batteries and of course on 5v. But it is not exactly clear if it is SAFE to run it on 3.7-4.2 v from … Continue reading

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