Previously we have driven servo and DC motor using an Arduino motor shield. It is easy to interface with these motors and write the code. This time we get to the stepper motor control and discover the full potential of the motor shield. Stepper motors are more complex devices than servos or DC and require some knowledge before running them. You cannot expect to plug some voltage and see it spinning. Their primary purpose is precise stepping that gives control of how much the motor is turning. You can find a stepper motor in any printer which feeds paper incrementally – and this is where you can get one. Disk drives are another great source to scavenge. We will not get into stepper motor working theory. Do your research before trying to run one.
Nowadays, many big and small companies prefer using Ruby on Rails when creating applications that are to be delivered on the web. It is not surprising, as Ruby on Rails offers lots of advantages over other web development frameworks. Lets have a closer look at the benefits of Ruby on Rails or Ruby, as it is usually called. This framework’s main advantage is that it makes the life of a web developer easier by allowing writing less code, which is achievable due to a leaner code base. Ruby on Rails is very easy to use. Besides, it gives speed and flexibility that no other scripting language or framework can give. Creating websites with Ruby on Rails is a lot faster and easier than with other web developing solutions. Generally, to develop and launch a website, the developer needs about twelve weeks. While using Ruby on Rails, a web developer needs six weeks to complete a similar project. The modular design of Ruby on Rails allows reusing earlier created elements rather than creating new ones. Making changes and adjustments is also a lot easier if a site is created with Ruby on Rails.
Updated on 2019 with simplified settings! Setting WiFi on Raspberry Pi is easier than described earlier. The Raspberry Pi has gone through upgrades and generations, so most of the settings have been simplified. If you set up WiFi using GUI, then it same as on any windows – you select SSID and enter a password. Raspberry pi should be mostly accessed through the console since it is designed to be an embedded computer. This is why it is important to have the ability to do all things in the command line. No matter which raspberry pi you have, you can set wireless networks the same way. If you use Raspberry Pi 1 or 2, you will need a USB wireless adapter. The later boards already come with built-in WiFi and Bluetooth connectivity. To set up WiFi, you need to edit wpa-supplicant configuration file, which can be accessed by entering: To the bottom of file add your network settings as follows: Save settings by pressing CTRL+X and Y to confirm. You may need to reboot your board for the network to connect.
Yesterday a friend asked to look at his old computer. He told that computer crashes randomly with Blue Screen of death (BSOD). He suspected to be an HDD problem due to bad sectors or so. He also wanted to save his pictures if nothing else can be done to make it work. Well, I took the PC for inspection. First of all, I tried to save photos – copy them to flash memory. Started up the computer and what you know – Antivirus software expired long ago, the virus is thriving. Found out that it is worm: Win32/Brontok@mm. From its description, I found that: Win32/Brontok is a family of mass-mailing e-mail worms. The worm spreads by sending a copy of itself as an e-mail attachment to e-mail addresses that it gathers from files on the infected computer. It can also copy itself to USB and pen drives. Win32/Brontok can disable antivirus and security software, immediately terminate certain applications, and cause Windows to restart immediately when certain applications run. The worm may also conduct denial of service (DoS) attacks against certain Web sites.
It’s been over three months since the solar collector was installed. I decided to build a controller by myself. And it turned out that it stayed in the prototype stage. So I put it into the enclosure and left it like is. So far, it works fine – water is hot every day, so I have nothing more to expect. I did not capture enough pictures of the build, but I think I will share what I have. In the forum thread, you probably saw what type of system I was building. As I mentioned, the solar collector is cheaply made in China and is pressureless. They usually come with a unique controller which takes care of the refilling tank, ensuring protection from water freezing and other individual scheduled routines. A pressureless collector usually is first filled with water which heats, and then it is used (mixed with cold). The initial test shows that when the collector is in direct sun, it boils what leads to heater elements’ calcification. Overall lifetime reduces and so efficiency.
You have concluded that you desperately need a mobile phone signal booster whose main goal is to help people get rid of bad quality cell phone perception forever. Great Popularity Because Of Effective Work Such devices have enjoyed great popularity with the development of mobile services. They make the quality signal better practically everywhere you wish – in a house, in a car or a truck, in an office building, etc. What is In a Set? This wonderful gadget consists of an external antenna, a signal booster amplifier, and an internal antenna. Still, sometimes, there are models where everything is packed in one unit, making it even more comfortable working. Do not Be Afraid of Doing it for the First Time In case it is your first time when you have to buy a mobile phone signal booster, here is some advice on what to pay attention to make the right choice ever.
Potentiometers are common electronics components that convert rotary or linear motion in to change of resistance. They can be found anywhere where some adjustments are needed, volume control, and joysticks. You can dive into the long theory about potentiometers, how they are made, what materials are used, and what output characteristics they have regarding rotation angle. As an electronics hobbyist and probably pro, you usually deal with two common types of potentiometers – standard pots with knobs and trim potentiometers. The first group of potentiometers is used where the user has to access the potentiometer when he needs to change one or another parameter like sound volume or screen brightness. They usually are more prominent in size and can be mounted vertically or horizontally to board. Also, they have a panel mount with the nut. This type of potentiometers needs to be mechanically stronger and resistive material more durable due to frequent use.
Probably you have noticed that Arduino is spread worldwide. It would be ridiculous to see one manufacturer producing them. The Arduino group produces an original board that is named Arduino. This is their trademark. But being an open-source product, Arduino has become popular in almost all workshops, so demand is enormous. Since building plans are public, other electronics manufacturers started building Arduino-compatible boards. These are the same Arduino boards but with Arduino’s name and logo removed. It is 100% compatible with standard Arduino that works with software tools, extensions, and modules.
It’s no surprise that most people are reluctant to get their ID photos taken; the lack of creativity you can portray in your photos and the strict guidelines that you are required to adhere to can definitely make this a not-so-pleasant experience. However, getting our ID photos taken is something that we have to do, and so we might as well look good and get the best quality photo possible. There are numerous tips, tricks, and steps that you can implement to increase your photos’ quality and still ensure that you adhere to the strict guidelines. We’ll take a look at some of these below.
While buying a factory-built computer is quick and easy, there are many advantages to building your machine. For one thing, you are sure to get precisely the components, software, and functionality you need, versus what the manufacturer wants to give you. Another issue is that pre-made computers often have proprietary parts and cases, making them difficult to alter and upgrade; homemade machines are more flexible in that area. Finally, homemade computers can be significantly less expensive. Be sure to work in an area that’s free of dust and on a non-conductive surface, like a wooden table. You should also avoid working on carpeting, which can generate static electricity, and ground yourself by touching the computer case’s metal part before touching the components. You can also wear an antistatic wrist strap to prevent static electricity. Step 1: Set up the Motherboard · Remove the motherboard from its packaging and set it on a steady surface. Do not sit it on top of the antistatic bag that it came in. Fit the processor into the designated slot or socket on the motherboard. If it has a heat sink, it should come with a thermal adhesive for you to attach to the processor.…