AnnMarie Thomas: Hands-on science with squishy circuits

Prevoditelj: Igor Dobec Recezent: Tilen Pigac - EFZG

I'm a huge believer in hands-on education.

Ja jako vjerujem u praktičnu edukaciju.

But you have to have the right tools.

Ali morate imati prave alate.

If I'm going to teach my daughter about electronics,

Ako želim naučiti svoju kćer o elektronici,

I'm not going to give her a soldering iron.

neću joj dati lemilicu.

And similarly, she finds prototyping boards

I slično, tiskane ploče

really frustrating for her little hands.

će biti stvarno frustrirajuće za njezine male ruke.

So my wonderful student Sam and I

I tako sam sa svojim odličnim studentom Samom

decided to look at the most tangible thing we could think of:

odlučila proučiti što je najopipljivija stvar koje bi se mogli sjetiti,

Play-Doh.

igranje s plastelinom.

And so we spent a summer

I tako smo proveli ljeto

looking at different Play-Doh recipes.

gledajući u različite recepte za plastelin.

And these recipes probably look really familiar

I ti svi recepti najvjerojatnije izgledaju poznato

to any of you who have made homemade play-dough --

svima koji su radili plastelin u kućnoj izradi --

pretty standard ingredients you probably have in your kitchen.

poprilično standardni sastojci koje svi imate u svojoj kuhinji.

We have two favorite recipes --

Imamo dva omiljena recepta --

one that has these ingredients

jedan koji ima ove sastojke

and a second that had sugar instead of salt.

i drugi koji ima šećer umjesto soli.

And they're great. We can make great little sculptures with these.

I oni su odlični. Možemo napraviti odlične male skulpture s njima.

But the really cool thing about them is when we put them together.

Ali stvarno super stvar na njima je kad ih spojimo.

You see that really salty Play-Doh?

Vidite ovaj vrlo slani plastelin,

Well, it conducts electricity.

on provodi struju.

And this is nothing new.

I to nije ništa novo.

It turns out that regular Play-Doh that you buy at the store conducts electricity,

Ispada da i običan plastelin kojeg kupite u dućanu provodi struju,

and high school physics teachers have used that for years.

i profesori fizike u srednjim školama to koriste godinama.

But our homemade play-dough

Ali naš plastelin iz kućne radinosti

actually has half the resistance of commercial Play-Doh.

zapravo ima dvostruko manji otpor od komercijalnog plastelina.

And that sugar dough?

A onaj plastelin sa šećerom?

Well it's 150 times more resistant to electric current

Pa on ima 150 puta veći otpor prema električnoj struji

than that salt dough.

od slanog plastelina.

So what does that mean?

I što to znači?

Well it means if you them together you suddenly have circuits --

Pa to znači ako ih spojimo da imamo električne krugove --

circuits that the most creative, tiny, little hands

krugove koje najkreativnije, male ruke

can build on their own.

mogu izrađivati.

(Applause)

(Pljesak)

And so I want to do a little demo for you.

I želim napraviti jednu malu demonstraciju za vas.

So if I take this salt dough,

Ako uzmem ovaj slani plastelin --

again, it's like the play-dough you probably made as kids,

opet, on je poput plastelina kojeg ste imali kao djeca --

and I plug it in --

i spojimo ga --

it's a two-lead battery pack, simple battery pack,

ovo je standardni spoj baterija --

you can buy them at Radio Shack

možete ih kupiti u trgovini s elektromaterijalom

and pretty much anywhere else --

i skoro svugdje drugdje --

we can actually then

i tada možemo zapravo

light things up.

upaliti stvari.

But if any of you have studied electrical engineering,

Ali ako je netko od vas studirao elektrotehniku,

we can also create a short circuit.

možete također napraviti i kratki spoj.

If I push these together, the light turns off.

Ako ih spojite, svijetlo se ugasi.

Right, the current wants to run through the play-dough, not through that LED.

Struja želi prolaziti kroz plastelin, a ne kroz LED.

If I separate them again, I have some light.

Ako ih opet razdvojite, imate svijetlo.

Well now if I take that sugar dough,

Ako sad uzmem ovaj plastelin od šećera,

the sugar dough doesn't want to conduct electricity.

šećer ne provodi električnu energiju.

It's like a wall to the electricity.

Poput zida za struju je.

If I place that between, now all the dough is touching,

Ako ga stavim između, sad se sav plastelin dodiruje,

but if I stick that light back in,

ali ako ponovno utaknem žarulju,

I have light.

imam svijetlo.

In fact, I could even add some movement to my sculptures.

Zapravo, mogu čak i dodati neke pokrete mojim skulpturama.

If I want a spinning tail, let's grab a motor,

Ako želim rotirajući rep, uzmimo motor,

put some play-dough on it, stick it on

stavimo malo plastelina na njega, spojimo ga

and we have spinning.

i okreće se.

(Applause)

(Pljesak)

And once you have the basics,

Jednom kad imate osnovne elemente,

we can make a slightly more complicated circuit.

možete raditi i malo kompleksnije krugove.

We call this our sushi circuit. It's very popular with kids.

Ovo zovemo sushi krug. Vrlo je popularan kod djece.

I plug in again the power to it.

Opet spojim struju na njega.

And now I can start talking about parallel and series circuits.

I sad možemo pričati o paralelnim i serijskim spojevima.

I can start plugging in lots of lights.

Mogu spojiti mnogo svijetla.

And we can start talking about things like electrical load.

I možemo početi pričati o stvarima tipa električno opterećenje.

What happens if I put in lots of lights

Što se dešava kad spojimo više svijetla

and then add a motor?

i onda dodamo motor?

It'll dim.

Zatamni se.

We can even add microprocessors

Možemo čak dodati i mikroprocesore

and have this as an input

i onda imamo ovo kao ulaz

and create squishy sound music that we've done.

i stvaramo glazbu s elastičnim zvukom.

You could do parallel and series circuits

Možete slagati paralelne i serijske krugove

for kids using this.

za djecu.

So this is all in your home kitchen.

Sve ovo imate u svojoj kuhinji.

We've actually tried to turn it into an electrical engineering lab.

Pokušali smo ovo pretvoriti u laboratorij električnog inžinjerstva.

We have a website, it's all there. These are the home recipes.

Imamo web stranicu, sve je gore. Ovo su sve kućni recepti.

We've got some videos. You can make them yourselves.

Imamo i video materijale. Možete ih sami napraviti.

And it's been really fun since we put them up to see where these have gone.

Bilo je stvarno zabavno vidjeti gdje su sve završili otkad smo ih stavili gore.

We've had a mom in Utah who used them with her kids,

Imamo mamu u Utahu koja ih je koristila sa svojom djecom

to a science researcher in the U.K.,

do znanstvenih istraživača u Ujedinjenom Kraljevstvu

and curriculum developers in Hawaii.

i sastavljača kurikuluma na Havajima.

So I would encourage you all to grab some Play-Doh,

Želim vas ohrabriti da svi uzmete malo plastelina,

grab some salt, grab some sugar and start playing.

malo soli, malo šećera i počnete se igrati.

We don't usually think of our kitchen as an electrical engineering lab

Najčešće ne gledamo na našu kuhinju kao laboratorij elektrotehničkog inžinjerstva

or little kids as circuit designers,

ili na djecu kao dizajnere električnih krugova,

but maybe we should.

ali bi možda trebali.

Have fun. Thank you.

Zabavite se. Hvala.

(Applause)

(Pljesak)