My First PCB Design

Posted under DIY, Hacks, Product Design on February 14th, 2021 by

Was going through my old electronics stuff back home and found this beauty. Probably the first PCB design which got made when I was a student with a friend of mine. Should be at least 12-13 years old. Locally etched, single layer.
It was for a line follower robot competition. 5 IR LED pairs and an L293D DC motor driver IC. I believe we got it working fine without any external help. These were the days before 2-day PCB delivery services, full-fledged electronic blogs, YouTube video tutorials, eCommerce component websites or heck even before proper broadband connectivity at home. 1GB per month data plan for the whole family with a blistering speed of 256KBps. Oh, those were the days…

It was super hard to do electronics in India during those times (And probably still is…)

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Heat Dissipation via Battery Charging

Posted under Educational, Product Design, Teardown, Technology on November 8th, 2020 by

The image shows the heat dissipation caused by a 10W battery charging circuit without a heatsink or forced cooling. Thermal management is a must in designs. Always follow the datasheet during layouts for the best thermal performance. Here dissipation is mostly via thermal vias and a large ground plane.

Thermal cameras will help you isolate thermal issues in your high-current boards.

Pro-tip for PCB designers: Never Ever give thermal relief for thermal vias. You will reduce the thermal dissipation with those reliefs. Folks usually miss this in design due to the usual habit of creating vias with thermal reliefs.

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