The habit of opening multi-tasks or apps on the iPhone devices usually lead to unresponsive screen and apps. That gives the user no choice but to force close or exit them to return normally.
In the previous iPhone devices as well as iPod Touch and Ipad is simply by double press on the home button to bring up all the opened apps and then swipe them upwards.
However with iPhone X is done differently because there is no Home button anymore. So how to force close it in this new device? Follow this tutorial guide
1. On the Home screen, swipe up from the bottom of the screen. This will reveal all the opened apps in the background (iOS multitasking).
2. Hold the app and then tap the no-entry icon OR the easy way is to swipe up to force close the app
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Obviously, we all know the pain, when we lose the cellphone signal. It's not the eighteenth century now; the cell phones are not just phone, they packed a mini-computer inside. Significantly, they are called smart-phones, and they are becoming smart day by day. Though some $5000 phone may handle the situation, maybe they get signals in mares, but we need to think about general peoples. Today I present some methods, by which you can make a booster antenna for your cell phone.
Consequently, the process is called DIY project. Eventually, a little or no engineering knowledge is required for the task.
Using Paper Clip: Bend a paper clip in L shape then place that into antenna hole or SIM card slot! Make sure, and your phone is parallel to it. Secure the clip using a clear piece of tape.
Custom Antenna: Accordingly, take 20 cm long, 2-4 mm iron wire, make it square shape, and bend the end in parallel. Then attach it in the back of your cell phone, and connect that with the signal weir.
Aluminum Foil antenna: Take a big piece of aluminum foil, and then roll it. Using that roll, make a circular shape, that need to be attached in the back section of the phone. Use copper weir to attach it with the antenna hole. Use duck tape or plastic for avoiding unnecessary shorting. Meanwhile, you may add a back cover for a finished look.
Using the three process mentioned on the upper section, you can make a booster antenna for a cell phone for yourself. Surprisingly, you may buy some booster antenna for your cell phone from the market. The best part is, they are cheap and easy to use. Now the choice is yours.
You can capture full screen or selected portion that you want and saved on your desktop.
How to take a full screenshot
On your keyboard hit + Command (⌘) + Shift + 3 key simultaneously on the keyboard.
The screen capture output is stored on the desktop as a .png file.
How to select a portion of the screen and capture the image
On the keyboard press Command + Shift + 4 at the same time. The pointer then transformed to a cross chair cursor.
Using mouse move the cross chair cursor to the intended area where you want to capture,
Still using a mouse then click, hold and drag the mouse button to make a selection. While dragging, hold Spacebar, Shift or Option to change the selections behavior.
Finally, release the mouse button to capture. Use the Esc key to cancel capture but do this before releasing the button.
The print screen image can be found on the desktop as a .png file
How to take a screenshot of a dynamic popup menu list and prevent it from being hidden.
Using the mouse or trackpad button - click on the menu to show its contents.
On the keyboard press Command + Shift + 4 key at the same time as the mouse cursor pointer will transform to a cross chair icon.
Using the mouse, click and hold the mouse left button and drag to select the menu. Once done release the mouse or trackpad button to capture.
How to screen capture of a window:
Press Command + Shift + 4 on the keyboard. The cursor will transform into a cross chair icon.
Hit the Spacebar button on the keyboard and the cursor changes to a camera icon.
Using mouse or trackpad button move the camera over to a window - it will automatically highlight it.
Click on the mouse left button or trackpad to capture
To cancel, press Esc on the keyboard before click to capture.
The output of the screenshot is on the desktop as a .png file format
The best 3rd party screen capture software Snagit for Mac;
If you are doing screen capture very often especially for work purpose - the combination of the button will tire you doing it day after day. Most of the time this small matter turns to disaster when it messes with your hard work.
Fortunately, there is a software called "Snagit" that especially can do this work with one press of a button and it really helps to reduce 90% of the time if there are plenty of screenshots to make. Apart from that it automatically saves the image to a specified folder that you have chosen instead of the desktop. This will reduce the time to delete or remove them again to prevent messing with the desktop screen.
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A frequency generator is an electrical/electronic device or circuit which creates a signal at a preset frequency. It could be fixed frequency such as (10 Mhz, 20 Mhz, 25 Mhz, 48 Mhz, 64 Mhz, 125 Mhz, or 330 Mhz) or adjustable frequency with that range.
Type of frequency waveform: sawtooth, square wave, sine wave, pulse.
What is the common use of frequency generator?
Frequency generators are used mainly in radio telecommunication devices - for Very High Frequency (VHF) range are used in radio telecommunications such as Walkie Talkie, car remote control, etc. Ultra high frequency or UHF band ranges from 330 Mhz up to 3000 Mhz (3 GHz) are used in high tech telecommunication devices mainly smartphones, internet modem, WiFi, wireless telecommunications.
How to make the easiest and simplest form of frequency generator?
To, some people especially who don't involve or new to electronics may sound very complicated to understand. Fortunately, there are electronic components that can be used to generate frequencies. We are not going to talk about Voltage Control Oscillator which requires some electronic knowledge and hands-on experience to understand it but active crystal oscillators which can generate frequency using a single component.
If you don't know about active crystal oscillator - video will give you an idea how it looks like and how to use it to generate frequency signal (square wave). The component consisting of 4 pins where the first pin with the dot is (NC = Not Use) and the second pin on the right of the dot is ground (connect to negative), the 3rd pin on the left above dot is (VCC connect positive) and the 4th pin on the top right of the dot is the output frequency signal.
This component can be powered by 5-volt battery or USB power supply to generate the square wave signal. Note that the frequency signal generated by this component is fixed and you can buy a couple of them with the following common frequency variations 10 Mhz, 15 Mhz, 20 Mhz, 25 Mhz, 40 Mhz, 48 Mhz, 125 Mhz, 330 Mhz. This is enough to generate some frequency needed in regular electronic devices like radio and televisions signal.
Higher frequencies can be obtained from the crystal by the means of frequency multiplication but we are not going to cover that part since it is a little bit complicated for a beginner to understand.
How to use the crystal oscillator?
Since most media and telecommunication devices such as walkie-talkies, radios, televisions and drone remote controls, toys remote controls are using radio frequencies to function - we can make use of the crystal oscillator to help to amplify their signals when it is weak. Some of the experiment I've done based on this crystal can be found here - how to boost cellphone signal using a 20 Mhz active crystal oscillator component. You can think of any such as Television antenna, Radio antenna etc depending on your needs on what kind of problem you are facing particularly on the weak signals.
Where to get active crystals components?
Online electronic stores like Element14, DigiKey, Mouser sells high-quality electronic components manufactured by the like of Murata, Abracon, Analog Devices. Or you can buy cheap China brand from eBay where you can get 125 Mhz and 330 Mhz for just a few dollars.
Another way is to salvage crystal oscillators from faulty telecommunications devices such as cell phones (mini SMD), switches/modems (internet), Televisions, Internet network devices, etc.
Some Knowledge
Do you know the conventional Russian made radar jammers are heavily reliant on the frequency signals generated by the crystal oscillators to generate its frequency? However, of course, they added some voltage oscillators circuit to assist on the signal variations. And the beauty is the Russian army has the best radar jammer on the planet in terms of military applications.
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