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Single Phase Induction Type Energy Meter Single phase induction type energy meters are extensively used for the measurement of electrical energy in single phase A.C circuits. One can find such meters installed in homes. It is also called as single phase watt-hour meter. Single Phase Induction Type Energy Meter Principle: torque is produced to rotate the disc is due to interaction of two fluxes. Since the e.m.f induced in the disc by induction, this instrument operates on A.C only. Construction: The below fig shows the various parts of a single phase induction type energy meter. It consists of a shunt magnet, a series magnet, a rotating disc, a brake magnet and a counting mechanism. The shunt magnet consist of a number of M shaped iron laminated core wound with a fine wire of many turns i.e. coils and is connected across the supply. The shunt coil carries a current proportional to supply voltage and is known as Pressure coil . The flux produced by shunt magnet lags behind the supply v...

Simple but high efficiency of this circuit is a Colpitts oscillator for VHF. Ideal for higher frequencies above 50 MHz, Colpitts oscillators are used for VHF parasitic capacitance of the circuit is in parallel with the feedback capacitance desired and causes no undesired spurious resonances which may occur with the Hartley oscillator. The circuit above is a VCO FM, it is a grassroots project with grounded feedback from collector to emitter. A Colpitts oscillator is a series of designs for electronic oscillator circuits using a combination of an inductance with a capacitor to determine the frequency. Make an Oscillator 50-300 MHz Colpitts Type Circuits Diagram

USB connector there are only 2 kinds, namely the connector type A and type B connector, as shown below. Type A connector used to connect the USB cable into the USB terminal on the back of the computer the last few years of production. Type B connector used to connect the USB cable into the USB terminal on the equipment, for a simple USB devices, such as mouse, usually do not use the connector B, to save cost in the cable directly connected to the inside of the mouse. Specified in the standard reference pesyaratan very strict to USB cable, not just the cable can be used, all the more for USB full-speed transfer of data to 1.2 Mega bps. So that the USB cable always sold as a ready-made, one end attached to the connector type A and the other end attached to the connector type B, no one sells it off the USB connector. On the computer, usually there are two terminals for connector type A, so it can easily be paired with 2 pieces of USB devices. Manufacturing company that makes the ...

                                        Permanent magnet type DC motor                                         Permanent magnet type DC motor                                        Permanent magnet type DC motor                               Permanent magnet type DC motor (back side )                           Permanent magnet type DC motor (back side )                          Permanent magnet type DC motor (back side )                   ...

Advantages and Disadvantages of Dynamometer Type Instruments Advantages: 1.        These instruments are free from hysteresis losses and eddy current losses. 2.        They have a precision grade accuracy. 3.        These instruments can be used on both A.C and D.C. They are also used as a transfer instruments. 4.        Electrodynamometer voltmeters are very useful where accurate RMS values of voltage, irrespective of waveforms, are required. Disadvantages: 1.        They have a non-uniform scale. 2.        These instruments have a low sensitivity due to a low torque to weight ratio. 3.        They are more expensive than either the PMMC or the M.I type instruments. 4.        These instruments are sensitive to overloads and mechanical impacts. Theref...