Category Archives: ScrapLabs Challenger

ScrapLabs Challenger : Modelling IC555 response using Arduino

Untitled Sketch 2_bb

So here is the video of a circuit’s response I made on IC555. I have used a potentiometer (variable resistance) with a standard IC555 blinking circuit. Now, I want you to model the same thing using Arduino Uno, Potentiometer (variable resistance) and an LED. The circuit is shared below. You can submit your codes at […]

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ScrapLabs Challenger: Blinking LED on prime intervals

All of us are aware of the LED blinking code from arduino examples section. We have also done some experimentation with the way LED blinking can be manipulated. I have a challenger for you based on similar arrangements. The goal is to make the LED blink in a manner that it is ON for seconds […]

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How can military tanks operate submerged in water?

The tanks can walk in water . How do they get air for combustion of their engine ?

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Scraplabs Challenger #4

So long since we challenged your brains and investigative spirit… Scraplabs Challenger #4 is here to get you working.   Tell us why both LEDs don’t glow simultaneously when connected together but glow perfectly when connected individually. Mail your entries to [email protected] and if we find your answer convincing then you might get yourself an awesome […]

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ScrapLabs Challenger – #3 Result

We have one winner and two featured commendation for ScrapLabs Challenger – #3 (http://blog.scraplabs.in/?p=184). Winner Featured Commendations Congratulations to all the winners! 🙂

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ScrapLabs Challenger – #3

We all have just celebrated Christmas! And how we loved all the food that was cooked. But with the relishing taste, here comes a chance for you to win the next ScrapLabs challenger! Microwave ovens have made cooking really simple. Their cost-effectiveness, reliability and ease of use have made them an essential appliance in the […]

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Nugget of Knowledge: Magnet falling through a copper pipe

This is also the answer to ScrapLabs Challenger – #2 The Challenger: http://blog.scraplabs.in/?p=119 The Winners: http://blog.scraplabs.in/?p=167 This can be best explained in two ways – via electromagnetic induction and conservation of energy. I’ll explain using both. Electromagnetic induction Note that we have two hands which are mirror image of each other. Note that when electricity is generated […]

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ScrapLabs Challenger – #2 Results

Sadly this time we have no winner for the ScrapLabs Challenger – #2 (http://blog.scraplabs.in/?p=119)! After reading over 300 emails on 50 threads we could find no entry that answered this convincingly. Though this provoked prolonged discussions with many students and provided them with an insight into concepts like magnetism, induction and electricity. However, we do […]

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ScrapLabs Challenger – #2

I want you guys to have a close look at this When a magnet is dropped down a copper pipe it slows down in its fall. You guys need to tell me – Why does it happen? Hint: Copper is NOT attracted by magnets. 🙂 Send your entries to [email protected] with ScrapLabs Challenger – #2 […]

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Nugget of Knowledge: Wood Gas for Driving Vehicles

This is also the answer to ScrapLabs Challenger – #1 The Challenger : http://blog.scraplabs.in/?p=41 The Winners : http://blog.scraplabs.in/?p=106 The solution to this challenger is rather amazing! Wood, say match-stick, is basically very close to hydrocarbon (like sugar). So when it burns it burns like any other hydrocarbon substance would! It is a two-step process. The carbon and […]

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