Introduction: The Engineer's Proposal of marriage Ring

"Marriage is a book of which the first-class honours degree chapter is printed in poetry and the remaining chapters in prose."

Engineers are too techie that sometime they are misunderstood for their way of organism romantic.I so disagree that ,engineering has it's own art.In my case i believe to exist always unique when information technology should refer show how much you love your daughter.
I accept Pt is the best proposal anchor rin material , only why not put the brain to creativeness and see how some basic electronics stuff can take in a beautiful proposal of marriage ring.

The Unsurpassed Part of the Mob

As we know every proposal has two answer it can be YES an Nobelium.

If the answer is

YES

The light-emitting diode glows

So if you the likes of this throw do make sure as shootin that you vote for information technology , in the wedding competition/Solace zone .

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Step 1: The Challenge

So the main take exception was to make a electronic ring that lights up when you fatigu it.

The main take exception in making unity was

  • Things should be compact that mean power source should be besides small.
  • Information technology should turn on when worn

All the items utilized will be easily available and totally salvaged and recycled.

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Step out 2: Part List

Electronics part

you will arrive the ferrite from an old ballast and the other at a local radio patronise the monetary value here is 0.15$in total

  • A ferrite torroidial core
  • 2X 10-15 cm long-dated thin wire
  • 1 k opposition
  • 2N2222 electronic transistor

Hardware break

you need to bribe this from a localized petrol station or hardware station

  • 1 gas pipe tightener ring

Tools

You will pauperism the following tools

  • bonding iron
  • scissors
  • paste gun
  • twezzer

Step 3: Power Choice

Power selection would beryllium very obvious to say that it would be a button cell bcecuase they

  • Light weight
  • High power
  • Variety of dimensions

Lets see the common type of push cellular telephone

CR2025

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This CR-2025 lithium bombardment, much known as a push battery, is a 3 volt battery that looks like a coin. Situation friendly, philosophical theory for cameras, calculators, watches, toys and another electronic devices Works in both depressed &adenosine monophosphate; high temperature operations. With this high power lithium technology, it offers dependable maximum power and a lifetime value for diminutive devices.

Battery Specifications

  • Nominal Voltage: 3 V
  • Capacity: 160–165 mAh

CR2032

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The CR2032 Battery Battery provide an excellent combination of high energy and continuous voltage supply. CR2032 Battery is a high-energy, mint-cell lithium battery that lasts longer than silver-oxide batteries and is groovy for use up in watches, medical devices and different electronics. Suitable replacements for brands like Duracell®, Eveready and Panasonic®. These batteries furnish long shelf life for back up Energy Department purposes together with ideal temperature resistance and superior storehouse capacity. This lithium coin batteries are guaranteed to cater optimal performance end-to-end the life of the shelling. CR2032 Stamp battery is ideal for cameras, wristwatches, electronic agendas and games, and calculators.

Battery Specifications

  • Voltage: 3
  • Capacity: 210

AG10

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AG10 Barrage is a button fles alkaline battery with a nominal voltage of 1.5V. The AG10 Battery is a 1.5V alkaline button cell battery that is used for small electronic devices. It is a popular Alkalescent button cell bombardment commonly victimized in cameras, calculators, toys, and watches.

Stamp battery Specifications

  • Nominal Voltage: 1.5 V
  • Capacity: 180 mAh

AG13/LR44

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The AG13 / LR44 / L1154 Electric battery is a primary cell barrage fire, and it is not-reversible. The AG13 Battery is a small and economical Alkaline battery with a nominal voltage of 1.5V. This alkaline button cell battery provides provident power living and excellent sustained exponent sources to your twist. Whole kit and boodle effectively in both low and high temperature. An saltlike barrage is a stamp battery that uses atomic number 25 dioxide and atomic number 30 to make over a chemical reaction, and it is an thrifty alternative to silver oxide batteries, while still providing high capacity and long usage.

Battery Specifications

  • Nominal phrase Voltage: 1.5
  • V Mental ability: 80 mAh

The Winner

LR2032/LR2025 has Postgraduate capacity but referable less size of it AG10 /AG13 is the winner but there is a problem how to puddle the voltage from 1.5V to 3.0V

Stride 4: James Prescott Joule's Thief

What is a Joule Thief ?

A James Prescott Joule stealer is a tour that sucks all act of electro-chemical juice out from a barrage fire and drives a output much the battery voltage.

It is a self oscillating voltage booster station and are extremely used DIY torch visualise to drive a LED at 1.5V battery .

How does IT work ?

The electrical circuit works by quickly shift the transistor. Initially, current begins to flow through the resistance, alternative winding and base-emitter junction which causes the transistor to lead off conducting collector current through the primary twisty. Since the two windings are connected in opposing directions, this induces a voltage in the subaltern winding which is positive, which turns the transistor on with higher diagonal. This self-stroking/convinced-feedback work on almost instantly turns the transistor connected as hard American Samoa possible (putt it in the chroma part), fashioning the collector-emitter path look alike essentially a closed switch (since VCE will be but about 0.1 volts, assuming that the base afoot is screaky enough). With the first winding effectively across the battery, the current increases at a rate relative to the supplying voltage segmented by the inductance. Transistor switch-unsatisfactory takes place away different mechanisms bloodsucking upon supply voltage.

Tone 5: Making the Circuit on Bread board

It was due to pull in's superior easy video that helped ME make the joule's thief

The steps are every bit follow :

  1. Take 2 wire and round them around single end
  2. Wound the wire roughly the torroid ferrite burden.
  3. Wind it close to the torroid for 8-9 multiplication.
  4. After that separate the two wire.
  5. Pack one of the end of the two wire.
  6. And solder it to the strange wire one other end.
  7. Solder a 1 k resistor to information technology .
  8. solder the 1k resistor to the base of 2N2222
  9. the collector is coll

Step 6: Qualification the Ring

Now the first gainsay fitting all the electrical circuit connected the to a ring , i was thinking alot of material to chose , like wires and pvc ring when i proverb pipework tightening ring in my planetary hous.
this was the perfective tense one for my build because

  • IT had a obedient surface field to stick all the components
  • My girlfriend's resound finger is a trifle trouble whatsoever to feel ring at-least for me so if this one has claims adjustor.
  • This is tardily to see for anybody so comprehensive build

Step 7: The Switch

The turning happening of the ring was a challenge itself because i precious it to turn the led on when the reverberate is placed in hired hand.
in-short the answer is Yes.

Possible solution i thought

  • Using two aluminium foil rag .
    Foils are good conductor of electricity and soh it was considered to be used for making a ramp up the manual switch .

why it is rejected ?

The foils would be damage after some use (it did damaged patc making only :P )

  • Exploitation push button

Push button are zealous for this case simply the challenge was again to use one that is real small.
And also how the triggering will be done. Luckiliy i had some old salvage ipod press clit that came in handy and i used them for the build

Step 8: Sticking Everything on the Echo

The last thing was to paste everything happening the closed chain .
Exploitation the glue joystick i glued the ferrite kernel inaugural.Then glued the transistor and the resistor on the both one-half and then added the turn on the reverse side of the ring. so that when it wore due to pressure the switch is pressed and the ring glows and the result is "YES"

Step 9: A trifle Fun With the Ring

I and my sister was decided to make just about light trails pass with the ring indeed we tested it with a exposure of 10 sec and 100 iso in a dark room.
We were doing some random motion and hither's what we got.

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