learning with leds - adafruit industries · 2018-08-22 · playing with leds, batteries and...

Learning with LEDsCreated by Rick Winscot

Last updated on 2018-08-22 03:39:11 PM UTC

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Guide Contents

Guide ContentsTools / MaterialsIntroduction

Did you know...Diode?

ComponentsPackagingKittingTeaching and Learning

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Tools / MaterialsIntroductionI've been making these little kits for kids (and kids of friends!) as well as school groups. its a nice way to get startedplaying with LEDs, batteries and switches

Did you know...

"An LED (light-emitting diode) is a special kind of diode that emits light when a current flows through it. The LED hastwo terminals, an anode and a cathode. Because it is a diode, electrons can only flow in one direction. When theelectrons cross the barrier between the anode and the cathode, they release a photon, which produces light."

Diode?

"A diode lets electrons flow in only one direction. It works like a switch: when current is flowing one way, the switch ison, but when current tries to flow the other way, the switch turns off. Sir John Ambrose Fleming is best known forinventing the diode, originally called the kenotron."

So much awesome knowledge!

And, here is a way to share this blinky awesomeness.

A list of materials you will need.

LEDs - our rainbow flashing LEDs are the most satisfying (https://adafru.it/caH)CR2032 Batteries (http://adafru.it/654)220 Ohm (https://adafru.it/d4v) or 330 Ohm (https://adafru.it/d4w) resistorsDiagonal Cutters (http://adafru.it/152)Small Flat Pliers (http://adafru.it/146) or Crimping Pliers (http://adafru.it/1213)Shrink Tubing (http://adafru.it/344)

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Small Ziplock Baggies ( 2 x 3 inches )

Optionally, you can include a LED sticker, badge, or both in your kits.

If you don't have any of these tools, you might want to consider Ladyada's Electronics Toolkit (http://adafru.it/136). Ithas everything you need... and more.

If you plan on soldering any of the components, I recommend using SAC305 RoHS lead-freeSolder (http://adafru.it/734)... especially if your kits are going to be in tiny hands.

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ComponentsStart by cutting the cathode (short leg) of the LED down to about 6mm.

Pick a leg, any leg on the button... and snip it off as near to the body of the button as possible; minimizing the sharpsnaggy bits.

Bend the pin across from the one you clipped out and the other two pins into the body of the button.

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If you are worried about sharp / pokey bits, you can use the leg of the LED you cut off to bridge the two legs of thebutton.

Use SAC305 RoHS lead-free Solder... especially if your kits are going to be in tiny hands.

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This circuit uses 20-24 AWG Crimp Sockets (https://adafru.it/d4x) to easily connect each component.

Wrap a socket around the free leg of the button and crimp in place.

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You can use a small pair of pliers, jewelry crimps, or one of the awesome crimpers (https://adafru.it/caH) from theAdafruit store.

Time to trim-up some resistors.

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Cut the lead to about 5mm on both sides of the resistor.

Crimp a socket on only one side... just like you did with the button.

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Leave the other side as a bare pin.

Dress up your crimp sockets with a bit of 2 - 3mm shrink tube.

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About 6mm each (because it shrinks) will do.

One over the crimp socket on the button.

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One over the crimp socket on the resistor.

Shrink the tubes with a heat gun, hand torch, match, lighter, or solar death ray of your choice.

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voilà... one down.

Fire burns... be careful!

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PackagingThe package template (blue download link below) includes a ready-to-print PDF and the original Adobe Illustrator file...modify away!

I've used standard printer paper here. It's easy to cut, fold, and glue... at the expense of the package being a little morefragile. If you want something more durable, you can always upgrade to cardstock.

https://adafru.it/d4y

https://adafru.it/d4y

After printing, cut on the solid lines...

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Using a straight edge, bend on the dotted lines.

'Pinching' the curved lines is pretty easy with standard printer paper... a little more difficult with card stock.

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Grab your favorite glue or sticky-tape dispenser.

I use a double-sided tape dispenser... it's fast and friendly. Apply to both tabs in the middle section.

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Carefully align the side tabs and press together.

You can put a dab on the lip of the package now... or wait until the last step of kitting; I prefer the latter.

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KittingYou can kit all the components yourself... or make a little family fun!

It's important to QA your kits - no one wants to open a dud!

Use plates, cups, or small containers to separate your components. Then, give each of your staff a battery and showthem how to assemble / test a kit.

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Good kits are disassembled and go in a small ziplock bag, bad ones are retired to the rubbish bin.

Time to add a battery and set of components to each one of your packages. Root Beer Floats may be needed at thispoint to replenish the massive amounts of energy expended.

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Teaching and LearningThere are so many fantastic resources to help you introduce electronics into your curriculum... for the young learner,you can use Ladyada's E is for electronics coloring book (http://adafru.it/1000).

Have you seen the MAKE presents series by Colin Cunningham?

MAKE presents: The LED (https://adafru.it/d4z)

MAKE presents: The Resistor (https://adafru.it/d4A)

MAKE presents: The Diode (https://adafru.it/d4B)

MAKE presents: Ohm's Law (https://adafru.it/d4C)

Great videos to help build context in your lesson plans.

Have you seen Snap Circuits® (http://adafru.it/739)?

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Or... littleBits (https://adafru.it/d4D)?

The future is bright... keep calm and blink on!

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