snippets

IOT Push Button (Like Amazon Dash)

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Amazon Dash button is an incredible piece of hardware and another example of “applied engineering” in Amazon, just like Kindle. The inspiration for this project isn’t directly derived from amazon dash, I wasn’t aware of it until I started digging the internet but at end, I had to set the performance goal to Amazon dash, because … Read more

Kindle Universal Dashboard

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Kindle is Super awesome ! Because of its e-ink display. I wanted a display to present data which has – Least power consumption, Not painful to eyes & obviously one which doesn’t emit blue light. E-Ink displays fit perfectly to my requirement – acquiring a display which can be driven using Raspberry Pi or Arduino is hard, … Read more

Javascript Domless events

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Using jQuery or nodejs makes you addicted to pubsub (publish/subscribe) model. Nodejs has nattive support for event emitters but javascript doesn’t have. Events are only binded to a DOM, using which doesn’t make sense and its also adds to performance cost. To solve the problem i wrote a custom class which implements `on` and `emit` … Read more

Converting Opensource Dictionary to JSON

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Folddoc provide free online computer dictionary but they don’t have any standard tool or format to import dictionary in database or so. Dictionary can be downloaded form http://foldoc.org/Dictionary.txt Run the following nodejs code it will dump dictionary to OUTPUT.json and don’t forget to remove initial lines of disclaimer or they will add to your dictionary. … Read more

Backup Server Configurations to Git

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When you have multiple servers it pain to remember every configuration and it may take hours to configure servers again incase you need. It is also impractical to copy each files. There are few tools available but they come with overhead attached moreover its fun to write custom solutions 🙂 1. Create directory 2. cd … Read more