Instructables - Make, How To, and DIY learn about the 555 The 555 Integrated Circuit (IC) is an easy to use timer that has many applications. It is widely used in electronic circuits and this popularity means it is also very cheap to purchase, typically costing around 30p. A 'dual' version called the 556 is also available which includes two independent 555 ICs in one package. For the 555 to function it relies on both analogue and digital electronic techniques, but if we consider its output only, it can be thought of as a digital device. The output can be in one of two states at any time, the first state is the 'low' state, which is 0v. The second state is the 'high' state, which is the voltage Vs (The voltage of your power supply which can be anything from 4.5 to 15v. 18v absolute maximum). Monostable mode: in this mode, the 555 functions as a "one-shot".
How To Get Better Battery Life From Your Android Phone If you have a modern Android phone, you know the pain of turning on your phone at 5pm only to realise it’s deep in a low-battery coma. Here are the simple manual changes, and clever automatic tweaks, that will keep your phone awake and useful for far longer. There are a lot of different things that can kill your phone’s battery, and often they’re things you don’t even need. We’ve mentioned quite a few of these before, but if you’re having serious battery life issues on your phone, make sure you check each of these settings, features, and customisations to make sure you’re getting the best battery life possible out of your phone. The Features That Draw Battery Power There are quite a few settings and features on your phone that will drain battery life, sometimes without your even realising it. Your Screen Your screen, especially if it’s one of the new beautiful Super AMOLED or Super LCD displays, draws by far the most battery from your device. How To Automate These Settings
Tutorials New! Getting Started with LTspice LTspice is a high performance SPICE simulator, schematic capture and waveform viewer with an impressive library of passive devices. RFID Basics An overview of Radio Frequency Identification (RFID) technology. LIS3DH Hookup Guide A guide to connecting the LIS3DH to a microcontroller and using the Arduino library. Lessons in Algorithms Learn techniques on how to use Finite Impulse Response (FIR) filters and other data-processing tools to turn data into information. Illuminated Mask Use LilyPad LEDs, a switched battery holder, and coin cell battery to make a fun light up mask for your next costume party. Glowing Pin Create a quick and easy piece of e-textile art using a LilyPad LED, battery holder, conductive thread, and coin cell battery. Light-Up Plush Craft a light-up plush with LilyPad LEDs controlled by pressing a button and sliding a switch in the creature's hands. Looking for the old, archived tutorials?
DIY « Filippa Malmegard The Internet of Skills I just watched the refreshing TED group talk on the notion of an Interspecies Internet featuring a hero of mine, Neil Gerschenfeld of MIT’s Center of Bits & Atoms, alongside animal cognition expert Diana Reiss, brilliant network guru and evangelist Vint Cerf and the more unlikely “geek band” member musician Peter Gabriel. Loved the idea […] My visit to ‘NYC Resistor’ – Cult hackspace in Brooklyn On my trip over to NYC this Feb I popped by cult Hackspace / Makerspace NYC Resistor in downtown Brooklyn. I’d met resident hackers Astrida & Kim at Maker Faire in September but not had chance to stop by the space. Hacks gone viral – From my kitchen to 2000+ shares on Facebook One of the most popular “scrap hacks” i’ve posted onto ScrapHacker is the pallet kitchen sofa. D.I.Y’ers = The new innovators ScrapHacker guest post on Wired Design ScrapHacker gets featured in Cosmopolitan Slovenija The results are in! Looking back #1: Open Source Hardware Summit ‘Hello Etsy’ Revisited
Système canadien de référence spatiale - Calcul inverse géodésique Démonstration en ligne News: CGVD2013 is now available! Natural Resources Canada has released the Canadian Geodetic Vertical Datum of 2013 (CGVD2013), which is now the new reference standard for heights across Canada. This new height reference system is replacing the Canadian Geodetic Vertical Datum of 1928 (CGVD28), which was adopted officially by an Order in Council in 1935. Geodetic reference systems stem from the need to provide a consistent and integrated reference surface for data analysis. This site provides end-users with the geodetic data and tools they need for a range of commercial and private uses. Date modified:
Build Your Own Lenses Nikon, Canon, Leica, Pentax, Sigma, Tokina, and a host of other lens makers are all striving to bring you the sharpest lenses with all optical aberrations reduced to the minimum. That’s too bad! Because with lenses, as with life, sometimes it’s the imperfections that make things interesting. The image on the left was shot with the imperfect optics of a homemade lens. There are two components necessary for a homemade camera lens suitable for use on a SLR or DSLR: the optics (to focus the light) and the mechanics (to hold the optics in place and hopefully provide a method of adjusting the focus and aperture). The Optics Any lens that focuses light (a double convex, plano convex, or positive meniscus) can theoretically be used as a camera lens. Notice that I used the word theoretically above. So unless you already know the focal length of your lens, you should measure it. Starting Simple Let’s look at some examples, including different ways to address the mechanics. Adjustable Focus Results
Customize your Jade Clone - The Clone Wars (have started). . . iPhoneToday will give your Clone the appearance and feel of an iPhone. Install the cab file to your device and you will have two options as how you want to execute the file. The first option is as per the developer: your Today screen must be reset from the Settings menu to have no other items present other than iPhoneToday. The second option, which I recommend highly, is to copy iPhoneToday's LNK file from WM Programs to Windows StartUp directory. When you see it on your Today screen (please see the attached picture for what my modified home screen looks like), you will need to reset the icons by tapping and holding them. I recommend you pick the icon you dislike the most to use as the first one you work on. Screen - Screen # is the page or tab you want the icon to be displayed at. Icon - Icon # (where # can be equal 0 through 11) is where you want the Icon to sit on a particular page. Image - most Programs have a standard PNG file that displays it as icon. Here is our xda link:
Learn About Electronics - Home Wisdom of the Hands Weller Magnastat Autopsy and Repair » Code and Life Immediately after soldering together my USB password thingy, my solder iron, the family heirloom Weller Magnastat stopped working. Some investigation showed that the base station was providing 24V AC voltage just fine, so I decided to unassemble the handpiece to see if something could be done. Here’s what I found: It turned out my iron was salvageable; read on to learn a bit about the Magnastat and how I was able to repair mine. Magnastat basics The construction of the device is surprisingly simple (see this image): The first (blue) wire from A/C power unit goes straight to the heating element (first red wire with black tube around it). A long tube goes “out” the handle part into the iron tip, and the tip is placed at the head. Note that in my model the tip and the magnastat are one solid piece (magnastat is in the base of the tip), newer models have a separate magnastat and tip, and you can change the target temperature just by changing the magnastat part. Reviving the old Weller
Arduino on a prototype board Arduino is a great prototyping platform and most of you probably know already about it. If not, check out the Arduino pages and the Arduino playground and dive into it. A couple of month ago I ordered my first Arduino board. It was one of the Diecimila revision. So what to do if these boards are far away across the ocean and it is holiday season everywhere? Gather components Luckily I had most needed components laying around. ATmega8, 16MHz, 8kB flash memory, 1kB sram memory2 x 0.1u capacitors2 x 22p capacitors16MHz crystal10k resistor1k resistorred 3mm LEDbutton6 pin header for ISP3 pin header for serial communicationprototyping boardUSBtoRS232 converterISP programmer All components can be bought for about 4.50â‚¬, without the ISP programmer and the USBtoRS232 converter. If I had a resonator, I would have taken that, instead of the crystal and the capacitors as it needs less space on the prototype board. The USB to RS232 converter is called USB-2-bot and comes from another project. Fuses