All too often, the commentors here on Hackaday display some parsimony in their engineering prowess. If someone uses a Raspberry Pi to blink a few LEDs, someone will invariably chime in that an ARM microcontroller would do just as well. switching a relay on and off belies the capabilities of a 32-bit Cortex microcontroller when a simpler 8-bit build would certainly suffice. Of course this can always be minimized to a 555 circuit and additionally still to conditioned pigeons tapping a crucial in action to either food or opiates. I’d like to take this opportunity to present a tutorial. Not just any tutorial, but the actual foundation of everything we love here at Hackaday: blinky, glowey things.
You can check out the rest of this tutorial after the break.
Bateria
Put bluntly, every project taking care of electrical energy needs a power source. Whether through mains power, a solar cell, some sort of odd inductive contraption, or through a chemical reaction, every electronic project needs a power source. I have considered a few different power sources for this project including mains power (far too hazardous to use with a light bulb), a bicycle generator (I’m focusing on strength training this week. Cardio is next week), hamsters and wheels (burning the hamsters as a fuel source and using a heat exchanger to turn a turbine), and magnets (how do they work?). In the end, I settled on using a battery to power the light bulb for this project.
The battery used for this build. It consists of four ‘D’ cells connected together in series by means of a COMF UM-1×4 battery holder. It supplies 6 Volts across its terminals.
The power source for this project is called a battery, as it is made up of a collection of cells. [Benjamin Franklin] came up with this terminology, alluding to artillery formations. just as a lot more than one cannon is needed to form an artillery battery, a lot more than one cell is needed to form one electronic battery. Yes, this indicates the AA, AAA, C, and D cells are not batteries per se, but individual cells. They only become batteries when used together. One exception of this is a 9 Volt battery, itself made of eight AAAA (that’s quadruple-A) cells. Na serio. go take a pair of pliers to a 9 Volt battery and see for yourself.
For this project I’ve used ‘D’ cells, as they have a larger capacity than AAA, AA, and C cells. The longer life of D cells is vitally crucial for this project; I very much expect to have this project sit in the back of my closet or tucked away in some drawer for quite a while until I stumble across it one day and remember the stunning April morning where I wrote this tutorial fueled by at least two pots of Kawa.
Of course just simply putting a battery next to a light bulb won’t do any good. regrettably transmission line theory is far too broad a subject to cover in this short tutorial so I’ll just have to cover the basics ideal now. This battery has two leads coming out of it; a positive and a negative. If we connect the positive wire to the negative wire, electrical energy will flow through the gap. At higher voltages, a small spark may form. With the voltages we’re working with here, it’s fairly safe, although it is possible to electrocute yourself with even these small voltages. While this may only be possible by stabbing your heart with electrodes and applying power, safety is of utmost worry when playing with electricity.
Żarówka
As connecting the positive and negative terminals of a battery together is amazingly stupid, we might as well throw in a light bulb. For this build, I’m using a 6 Volt light bulb that pairs perfectly with our four D cell battery. just like our battery holder, the socket for the light bulb is attached to a piece of plywood, much a lot more convenient and ergonomic than any flashlight or electric lantern.
You may notice the light bulb is off in the picture below. This is because the light bulb is not screwed down completely into the socket. Yes, unlike LEDs where electrical contacts are soldered on, light bulbs are normally wired into a circuit with a screw-type base. just as with the lid on a jar of peanut butter, you screw the light bulb into the socket by turning it clockwise. To remove the light bulb from the peanut butter, unscrew it by turning it counter-clockwise.
Before we get into the actual process of turning on a light bulb by screwing it into its base, let’s first consider how a light bulb works. The light bulb was developed by [Thomas Edison] after many, lots of failed attempts at creating a functional electric light. The light bulb I’m using passes electrical current through a tungsten filament, heating it up and producing light as blackbody radiation. before discovering tungsten as a best filament for an electric light, [Edison] tried hundreds of different materials from carbonized bamboo to the hopes and dreams of a young [Nikola Tesla]. Of course the use of tungsten wasn’tBez jego zbiorów – w tym czasie nie było komercyjnego stosowania dla wolframu i jego bardzo wysokiej temperatury topnienia, najwyższy z dowolnego elementu, uczynił go niepraktycznym do stosowania w przemyśle.
[Edison] Zastosowanie wolframu w jego udanej żarówce gwarantowało ciągłe zatrudnienie tysięcy tungsten górników w backwoods West Virginia Tungsen Towns. Życie nie było łatwe, sprzedawaj swoją duszę do sklepu firmowego i obserwować, że twoje dziecko dorastają, aby wziąć twoją pracę po utracie tragicznej jaskini. Oczywiście warunki pracy poprawiły się po zamieszek Miner Wolfsten z 1824 r. I interwencją batmana gubernatora.
Zamykając, profesor na wyspie Gilligana był niekompetentnym głupcem. Ponieważ nie był wyraźnie materiałem naukowym lub inżynierem strukturalnym w stosunku do jego niezdolności do naprawienia dziury w łodzi, możemy tylko założyć, że był jakiś rodzaj fizyka lub inżyniera elektrycznego. Nie jest to zgodne z działaniami profesora; Nawet drugi rok licencjackich byłoby w stanie skonstruować podstawowy przetwornik szczeliny iskier przy użyciu komponentów znalezionych w ich radiu i okablowaniu znalezionym na pokładzie statku.
“Zaczekaj.” Mówisz, “transmisje szerokopasmowe, a zatem przetworniki szczelinowe iskier są nielegalne”. Tak, to rodzaj tego punktu. Gwarantuję, że jeśli profesor zbudował nadajnik spłonka – i pamiętaj, że jest to najprostszy nadajnik, który może być wykonany z kokosów i ewentualnie jedna z suknie wieczorowa pani Howe – amatorska operator radiowy wyśledziłby je w ciągu kilku godzin . Wiemy już, że profesor znał Morse’a od sezonu Dwa odcinek, Ghost A Go-Go, więc naprawdę nie ma nic przestać profesora i wszystkich, którzy wychodzili z wyspy.