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Postez pe acest blog pur si simplu fiindca imi place si sunt dornic sa impartasesc cu toata lumea experimentele mele, filmarile, chestiile DIY si multe alte lucruri. Ma simt eu mai bine daca o fac :).
Blogul este in engleza, fiind o limba de circulatie internationala. Cred ca majoritatea va descurcati sa o intelegeti ;).
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It uses some kind of tritium vials that it seems are safe to handle, they emit weak beta radiation that doesn’t pass the glass. Although somebody should test these out with a Geiger counter .
This is a small project I was done with in about one hour(I didn’t found a use for it, but I’ll update the post if I do ). It’s easy to build, especially for beginners like me. And the result is satisfying.
I used 2 blue leds, and I tested the circuit on my pc Power Supply. I found out that, although it’s designed for 5V, if I connect it to a 3,3 V line it will flash quicker.
Parts list:
2x 5mm LEDs( I think it works best with blue\white leds)
2x BC547Ctransistors( ‘universal’ transistors, they’re pretty common and easy to find)
a 4,5v-5vDC source(I used my power supply to test, but you can use 3 AA batteries)
Some pictures:
This project is so easy to build that I don’t really think it’s necessary to explain how to do it. But I’ll give you some indications if you really want to build it.
-When soldering it’s really hard to solder with one hand and hold the pieces together with the other hand. You need to use some kind of stand. If you don’t have one, you can improvise, like me . I used a pair of pliers with a rubber band on them so it can hold small pieces while I solder them.
-Be attentive to polarities. For resistors it doesn’t matter(you can actually see in the pictures they’re not in the same direction). LEDs, electrolytic capacitors and transistors are polarized though. Be attentive to the schematic and solder them as indicated. Need help here too? Well here’s how to find the polarities:
LEDs: on the schematic, the negative part of the led is represented by a bar on top of that triangle. The other side of the LED(the one that, if you follow the wire, goes to the +5V input) is obviously the positive wire. Negative= Cathode, Positive=Anode. You know which is which because the anode wire is longer than the cathode. Also, near the cathode the LED is a bit flattened(it’s a bit hard to see).
Electrolytic Capacitors: this one is easy, because it’s written on the capacitor’s package(usually the negative side is indicated).
Transistors: This is a complex subject but I’m only going to clarify how to solder in the current situation. On the schematic you can see there’s an arrow on one of the wires. That’s the emitter. The middle one is the base, and the other wire is the collector. Because there’s no indication on the transistor, you need to consult the transistor’s data sheet. Here’s the BC547C datasheet.
Ok, here’s the schematic:
2 Leds flasher Schematic
I made the schematic using an open-source software: TinyCad !
Am facut un tutorial pentru un concurs in care se cere sa ai durata maxima de 30 de secunde. N-am putut altcumva decat sa accelerez vorbitul intr-un program, veti da pauza de cate ori vreti sa observati ceva in detaliu .
Din pacate tutorialul este in engleza, dar majoritatea stiti limba engleza
Hey all, I found a cool method to build a speaker ! Just search after “kipkay” on youtube, you’ll surely find it
And it’s quite cool too. This is what I did :
Made a coil on some scrap paper
Glued the coil on the plastic plate
Built some suspensions from scrap paper which will sustain the plate and coil
Put some magnets in the center of this coil while allowing it to move freely vertically
The result wasn’t as I was expecting, and I immediatly noticed the problem : the coil has a low resistance , meaning that it lacks of wire.
Well, anyway it had sound and also at full bass the plate was moving up and down, cool . At some point the coil began smoking. Here are some pictures and a video(smoking) with it :
Am incercat sa fac un motor dintr-o bucata de sarma, magnet , curent electric desigur si niste agrafe de birou. E cam fail, dar macar am reusit sa-l fac sa se invarta.
Dupa ce fac rost de un magnet cilindric incerc sa fac un motoras calumea ( e doar pentru amuzament, am eu destule motorase acasa ). O sa ma mai documentez . Chestia asta functioneaza prin inductie magnetica ? ( de aia o sa ma documentez )
Gata , am terminat de facut filmarile . Sunt 3 parti , pentru ca nu am voie sa uploadez pe youtube un clip mai lung de 10 minute iar eu am net de 512 kb/s si uploadeaza greu . ACum incep uploadul . Sper ca o sa intelegeti ceva din videourile astea pentru ca am filmat cu telefonul care are camera de 1.3 MP . Ca sa fie mai confotabil , asezati-va pe canapea , departe de monitor si dati fullscreen la video . Asa o sa se vada mai bine ( de la distanta ) si o sa intelegeti mai bine.
Titlul paginii va fi ” Bateria pe Apa ” is va aparea in categoria “DIY Electricity” .
Salut , imi pare bine sa vad ca am vizitatori deja . Blogul e in “constructie” . Adica trebuie sa-l finisez , sa-l fac mai “custom” .
Nu pot sa spun exact pe ce teme se vor axa articolele mele . E greu de spus …. Dar hai sa vedem pasiunile mele mai intai ca sa va faceti o idee :
Natura si Spatiul ( nu prea le am cu cunostintele dar imi place sa citesc despre ele )
Stiinta ( pot sa categorisesc putin )
Electricitate
Calculatorul ( lol , ceva normal )
Aproape tot ? =))
Imi place mappingul de half-life 1 dar in ultima vreme am lasat-o mai moale din cauza ca mi-am luat o placa video Ati si am probleme cu hammer editorul
[EDIT 27 septembrie 2009] M-am cam reprofilat pe Source mapping (hl2 )
Jocurile ( cui nu-i plac ? …. )
ETC …..
Deci articolele mele se vor avea teme de gen DIY ( sub forma de tutoriale ) si “prostiile” care le fac eu …. umm “experiente” cum imi place sa le numesc
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). It’s easy to build, especially for beginners like me. And the result is satisfying.
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