Tag Archives: diy

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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The best LM386 video tutorial ever!

Add a 1000 uF polarised capacitor between the positive and negative rails to eliminate noise that occurs when the voltage source is from an AC-DC adapter.

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My DIY radio & MP3 player with built-in tweeter, mid & woofer speakers

The woofer is from an old 2.1 Philips PC desktop speaker. The speaker cone was replaced recently. The FM antenna is just a wire. The mid & tweeter speakers on the rear are new. They are full-range speakers, not really … Continue reading

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My DIY Boom Box doing time with AC adapter and hanging bed switch

I got lots of speakers, media players and amplifiers. I have two amplifiers in development. So, I moved my original LM386 DIY Boom Box to the kitchen where it is powered by a AC adapter. To cut the power when … Continue reading

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DIY RJ45 plug locking tab protector made from cable sheath

With great hope, I cut a piece of the sheath and stuck it to the RJ-45 plug (I crimped a new one today) just below the locking tab, taking inspiration from the Sugru RJ-45 protector on Instructables.com. I don’t know … Continue reading

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