Strain Gauge

Typical foil strain gauge. The gauge is far more sensitive to strain in the vertical direction than in the horizontal direction. The markings outside the active area help to align the gauge during installation.

A strain gauge is a device used to measure the strain of an object. Invented by Edward E. Simmons and Arthur C. Ruge in 1938, the most common type of strain gauge consists of an insulating flexible backing which supports a metallic foil pattern. The gauge is attached to the object by a suitable adhesive, such as cyanoacrylate.As the object is deformed, the foil is deformed, causing its electrical resistance to change. This resistance change, usually measured using a Wheatstone bridge, is related to the strain by the quantity known as the gauge factor.

Physical operation

A strain gauge takes advantage of the physical property of electrical conductance and its dependence on not merely the electrical conductivity of a conductor, which is a property of its material, but also the conductor's geometry. When an electrical conductor is stretched within the limits of its elasticity such that it does not break or permanently deform, it will become narrower and longer, changes that increase its electrical resistance end-to-end. Conversely, when a conductor is compressed such that it does not buckle, it will broaden and shorten, changes that decrease its electrical resistance end-to-end. From the measured electrical resistance of the strain gauge, the amount of applied stress may be inferred.

A typical strain gauge arranges a long, thin conductive strip in a zig-zag pattern of parallel lines such that a small amount of stress in the direction of the orientation of the parallel lines results in a multiplicatively larger strain over the effective length of the conductor—and hence a multiplicatively larger change in resistance—than would be observed with a single straight-line conductive wire. Strain gauges measure only local deformations and can be manufactured small enough to allow a "finite element" like analysis of the stresses to which the specimen is subject. This can be positively used in fatigue studies of materials.

New ContiComfortContact CC5 - RM200 per tyre

I already changed 4 tires for my toyota car which total cost me at RM800.00. The replacement of new tires already included balancing and alignment work.

I changed it at Jalan Kapar Klang.

Now the problem is the alignment. Already went to 2 workshop to do alignment work but until now still not good. Not sure what is the root cause. But not because of the new tires.

Looking a Solar Panel for Bird's House

Found this on the net.

Product Description

Metec Solar power station is ranging from 20watts to 10KW.
50watts=50watts solar panel
10kw=10kw solar panel

OFF-GRID SOLAR power SYSTEM 1000W (can be changed into on-grid according customer needs)
Characteristics
1) Can provide electricity for6-8h/days
2) Can guarantee that two consecutive rainy days of normal power supply.
3) Solar modules for peak power: 1000 Wp.
4) The output voltage to: 220 VAC +10% (Or 115VAC +10%)
5) Max Peak Power in one days (6-8 Hours) 6000-8000W
6) The maximum power load for the system: 800 W.
7) Protection: Battery Charger Protection, Battery Low Voltage Protection, Overload Protection

Short Circuit Protection, Thermal Protection, Fault Indication Function
1000W solar system can power the following
20 Energy Saver Bulbs
1 Radio or CD/DVD player
4 Fan
1 Refrigerator
1 Desktop / Laptop
1 20" Colour TV

Major Component
1)10PCS* Solar Modules 100w 17.2V 5.81A Polycrystalline (Mono crystalline )
2)1set * Solar Charger Controller 12V/24V 50Amps
3)1set * Solar Inverter Pure Sine Wave 24V 1000W
4)12PCS* Deep Cycle Battery Maintenance-free 12V 100AH
5)1set* Cable, Connector

Samsung Galaxy S 2 Hands-On

Samsung Galaxy S 2 Hands-On



General Samsung Galaxy S2 specs:

1. 4.3″ SUPER AMOLED Plus
2. Samsung Dual Core Application Processor
3. World Thinnest 8.49mm Slim Design
4. HSPA+ 21Mbps
5. Wi-Fi Direct
6. AllShare
7. 8MP Camera with LED Flash
8. Full HD Recording & Playback
9. NFC (Near Field Communication)
10. Game Hub, Social Hub, Music Hub, Readers Hub

Introduction to Electric Generator

In electricity generation, an electric generator is a device that converts mechanical energy to electrical energy. A generator forces electrons in the windings to flow through the external electrical circuit. It is somewhat analogous to a water pump, which creates a flow of water but does not create the water inside. The source of mechanical energy may be a reciprocating or turbine steam engine, water falling through a turbine or waterwheel, an internal combustion engine, a wind turbine, a hand crank, compressed air or any other source of mechanical energy.



Early 20th century alternator made in Budapest, Hungary, in the power generating hall of a hydroelectric station Early Ganz Generator in Zwevegem, West Flanders, Belgium.

The reverse conversion of electrical energy into mechanical energy is done by an electric motor, and motors and generators have many similarities. In fact many motors can be mechanically driven to generate electricity, and very frequently make acceptable generators.