Friday, April 7, 2017

How to Get Emergency Power From a Phone Line

How to Get Emergency Power From a Phone Line
What do you do if the power is out and you need to charge your cell phone to make an emergency phone call? Don’t worry. There are plenty of potential power sources all around you. One of them is the phone line. In this instructable, I am going to show you how you can use the phone line to power your small electronic such as your phone or other USB devices in an emergency.

Note: This project is intended for emergency situations only. Please be aware of applicable local laws regarding phone lines in your area.

Step 2: Check the Phone Line With a Multimeter

Check the Phone Line With a Multimeter
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Before you try to tap into the electricity in the phone line, you should check it with a multimeter to see what you are working with.

Start by cutting open a phone cord and separating the internal wires. In most cases you will have one red wire and one green wire. Strip the insulation off the ends. Then plug the cord into a phone jack and use a multimeter to measure the output voltage. At my house, I measured an open-circuit (no load) voltage of 52 volts DC.

Then I hooked up various resistors to see what the output would be with different loads. I determined that the supply voltage isn't regulated. This means that the voltage changes depending on the resistance of the circuit that it is powering. After some calculating, I worked out that the base signal coming out of my phone jack pretty closely resembles a 52 Volt DC source with a 628 ohm internal resistance.

Basically this means that I can run a 12V circuit at 64mA, a 9V circuit at 68mA, or a 5V circuit at 75mA. This isn’t a lot. But it is enough to charge a cell phone.

Step 3: Construct a Simple Voltage Regulator Circuit

Construct a Simple Voltage Regulator Circuit
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We know that the phone needs 5 volts in order to charge. But we don't know how much current it draws or it's equivalent load resistance. So we can't charge the cellphone directly from the phone line. We need to use a voltage regulator to bring the output of the phone line down to 5 volts and keep it there. A LM7805 5 volt regulator should work fine.

To make this simple phone line adapter you will need the phone cord that we have been working with, the 5V voltage regulator and a USB connector cable with a female end. Just connect the red wire from the phone line to the first lead on the regulator and connect the green wire from the phone line to the second lead. Then connect the black wire from the USB cable to the second lead on the regulator and connect the red wire from the USB cable to the third lead on the regulator. If you can't solder the wires together (because the power is out), you can just wrap the wires around each lead. If you do this, you should bend the leads of the regulator away from each other. This will help you avoid accidentally crossing the wires.

This simple regulator circuit is able to safely convert the base phone signal into something that can be used to charge your phone. However, many voltage regulators are not able to handle the AC signal that they would receive if the phone rang. So if you are worried that you might receive a call while your regulator is hooked up to the phone line , then you may wish to add a diode between the red wire from the phone line and the first pin on the voltage regulator. This will protect your circuit from problems that may be caused by reverse polarity.

Step 4: Use Other Regulators for Other Output Voltages

Use Other Regulators for Other Output Voltages
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A 7805 regulator will work if you need an output of 5 volts but other kinds of voltage of voltage regulators are also available. Other voltages in the 78xx series include 6V, 8V, 9V, 10V, 12V, 15V, 18V, and 24V. In addition to these fixed value regulators, there are also variable regulators that let you set the voltage level with the use of a few external components. One such variable voltage regulator is the LM317. These are what you would use if you needed a different output voltage.

Step 5: Finished Phone Line Adapter Tool

Finished Phone Line Adapter Tool
Plug the phone cord into the nearest phone jack. Then plug your phone and charging cable into the USB cable. Your phone should begin charging. In a few minutes, your phone should have enough power to make a call.

Wednesday, April 5, 2017

QSB-91 shooting knife (China)






Trigger type
Double action only
Caliber
7.62x17 Type 64
Weight, empty
0.69 kg loaded with sheath
Length
265 mm
Barrel length
89 mm
Capacity
4 rounds


QSB-91 shooting knife was developed in China during early 1990s, and is in use by special elements of PLA and Chinese armed police.

QSB-91 is a fixed blade combat knife with round hollow handle, made of metal. Inside the handle there are four fixed 7.62mm barrels, pointing toward the blade (two barrels at each side of the blade). Each barrel is reloaded separately from the breech, once the screw-on end cap is removed. The end cap contains a rotating striker, which turns 90 degrees before striking next primer every time the trigger is pulled. Trigger is placed at the front of the grip and doubles as a guard for the knife. Trigger unit is of double action only type, with relatively long and heavy trigger pull. Fixed sights are located on the grip, at roughly 11 o’clock position when looking from the rear. To fire the built-in gun, knife must be removed from the sheath, loaded and pointed to the target, blade first. Once sight is acquired, trigger is pulled up to 4 times, each time discharging one barrel. Apparently, QSB-91 knife cannot be fired with sheath on.
Type 64 pistol ammunition is of conventional type, based on the 7.65x17SR Browning / .32ACP cartridge, but with rimless case. Therefore, unlike practically noiseless Russian NRS shooting knife, QSB-91 shooting knife is far from being quiet when it is used to shoot at the enemy. Claimed effective range when firing built-in barrels is stated as 10 meters.


http://modernfirearms.net/handguns/hg/ch/qsb-91-e.html

NRS and NRS-2 recon / scout shooting knife (USSR / Russia)

CL380

The most revolutionary self defense gun.


CL380

  
MSRP $795.00 Shipping to begin late in 2016
Available in Stainless with black grips
Material: Stainless Steel barrel and receiver with polymer grips
Size: .85 x 2.3 x 3.6 (22 x 59 x 91 mm)
Weight: 6.0 oz. (170 grams)
Laser Info: Internal green 5 m/w
Battery: Two 1/3n
Ammo: .380 ACP
Capacity: Two rounds






bb pistol to .22 conversion tutorial

how to turn an airsoft gun into a real gun

Tuesday, April 4, 2017

PRISON BREAK

Sub-GHz receiver IC
300-480Mhz RF Signal Data Receiver IC

CMT2210AW

300-480Mhz RF Signal Data Receiver IC

The CMT2210AW is an ultra low power, high performance, low-cost OOK stand-alone RF receiver IC for various 300 to 480 MHz wireless applications. It is part of the CMOSTEK NextGenRFTM family, which includes a complete line of transmitters, receivers and transceivers.

Download Datasheet

Related products

  • Description
  • Resources
  • FAQs
  • Typical applications
1. Descriptions of RF Receiver IC CMT2210AW:

The CMT2210AW is an ultra low power, high performance, low-cost OOK stand-alone RF receiver for various 300 to 480 MHz wireless applications. It is part of the CMOSTEK NextGenRFTM family, which includes a complete line of transmitters, receivers and transceivers. 

An embedded EEPROM allows the frequency, symbol rate and other features to be programmed into the device using the CMOSTEK USB Programmer and RFPDK. Alternatively, in stock products of 315/433.92 MHz are available for immediate demands with no need of EEPROM programming. 

When the CMT2210AW is always on, it consumes only 3.8 mA current while achieving -114 dBm receiving sensitivity. It consumes even less power when working in duty-cycle operation mode via the built-in sleep timer. The CMT2210AW receiver together with the CMT211xW transmitter enables an ultra low cost RF link.

2. Features of RF Receiver IC CMT2210AW:

● Embedded EEPROM
        -Very Easy Development with RFPDK
        -All Features Programmable
● Frequency Range: 300 to 480 MHz
● Sensitivity: -114 dBm at 1 kbps, 0.1% BER
● 3-wire SPI Interface for EEPROM Programming
● Stand-Alone, No External MCU Control Required
● Configurable Duty-Cycle Operation Mode
● Supply Voltage: 1.8 to 3.6 V
● Low Power Consumption: 3.8 mA
● Sleep Current < 20 nA
● Low Sleep Current
        -60 nA when Sleep Timer Off
        -440 nA when Sleep Timer On
● RoHS Compliant
● 16-pin QFN 3x3 Package

3. Applications of RF Receiver IC CMT2210AW:

● Low-Cost Consumer Electronics Applications
● Home and Building Automation
● Infrared Receiver Replacements
● Industrial Monitoring and Controls
● Remote Automated Meter Reading
● Remote Lighting Control
● Wireless Alarm and Security Systems
● Remote Keyless Entry (RKE)

Ok guys, back again...I was wondering about this Tanner Krolle cover gun mechanism on the suitcase lock system (that by the way is carried by Saudi Arabia King, and good british royals) and this is the mechanism...of course on miniature

The Blish Lock is a breech locking mechanism designed by John Bell Blish based upon his observation that under extreme pressures, certain dissimilar metals will resist movement with a force greater than normal friction laws would predict. In modern engineering terminology, it is an extreme manifestation of what is now called static friction, or stiction.



Breech-closure for firearms.
US 1131319 A

U.S. Patent 1,131,319

HOWEVER THE LOCK SYSTEM ON THE SUITCASE IS ROUND LOOKING LIKE THIS US PATENT 1867513 CARTRIDGE CASE


DISGUISED GUNS






Naval Tactics ( Echo Era Corp)