Category Archives: how to

How to create a cheap DIY backlit keyboard

Well, it is not really backlit. It is rather “overlit”. I took a clear-plastic-and-cardboard case, added a few LED bulbs and a transistor and connected them to 5 volts from a USB port. It is a cheap solution but far … Continue reading

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How to power 12v LED strip using 5v USB port – add a step-up transformer

USB ports supply 5 volts. The 12v LED strip requires at least 9 volts. I bought a step-up DC-to-DC boost transformer circuit which can step up from 1.5v and up it up 24 or 32 volts. It took 5 volts … Continue reading

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Low-cost DIY portable emergency light using LED strips & 9-volt rechargeable batteries

The white LED strips operate at 12 volts. They will light up even at at 9 volts but will be less brighter. The multi-colored LEDs are not really an emergency lighting option but are good enough to help you find … Continue reading

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How to write citations with Markdown & retain links in your article’s references section

I use Markdown to write articles but it surprisingly does not support citations. Markdown simply removes all references after it creates hyperlinks in the output. Today, I was writing an article today with markdown and decided to find a solution. … Continue reading

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How to make lye soap

Recently, I have been watching The Beverly Hillbillies episodes from Archive.org (https://archive.org/details/classic_tv?and%5B%5D=subject%3A%22Beverly+Hillbillies%22). In its first episode, there was a reference to home-made “lye” soap. Apparently, Sodium Hydroxide (NaOH), a base, is called lye. Mixed with a limited quantity of water, … Continue reading

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Run Opera browser 12.x DragonFly web developer tool locally

Once a path-breaking web browser, Opera is now just another Google Chrome clone. I still use the pre-Blink 12.x Presto-based Opera browser and it remains my primary browser of choice even now. I use its Developer Tools utility quite often. … Continue reading

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How to change the date format of the date column of Thunderbird or Seamonkey Mail

The date format of the date column in Thunderbird/Seamonkey Mail/IceDove is based on your current locale. If you want to shorten in it in a meaningful way, you need to change the locale. This is not a good thing to … Continue reading

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