Wednesday, August 7, 2013
50W Offline Switching Power supply Circuit Diagram
The schematic shows a 50W power supply with a 5-V 10-A output. It is a fly back converter operating in the continuous mode. The circuit features a primary side and secondary side controller will full-protection from fault conditions such as over current. After the fault condition has been removed, the power supply will enter the soft-start cycle before recommencing normal operation.
50W Offline Switching Power supply Circuit Diagram
Monday, August 5, 2013
Wiring Diagram
Network Cable Use Either 568a Or Most Common 568b Wiring On Both Ends.
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Saturday, August 3, 2013
Cat7 Cables Unshielded Twisted Pairethernet Wiring
Crossover Ethernet Cable.
Figure 3 Tie Eia T568 Ethernet Wiring Standards.
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Figure 4 Wiring Diagram For An Ethernet Crossover Cable.
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Thursday, August 1, 2013
Analog Signal Transmission Circuit Through DC Supply Line
If the sensor system need an active supply, we can use only a single pair of cable to carry both the power supply and the output signal. Not only simplify the wiring, converting analog voltage level to frequency modulated pulse improve the noise immunity as well. This is the figure of the circuit;
The diode is employed to prevent the capacitor voltage to be discharged when the transistor is grounding the supply voltage source to send a zero pulse. If the sensor or input system need a supply, we can tap the power from the 1uF capacitor, as long as it need only small current. [Circuit diagrams source: Microchip Application Note]
Tuesday, July 30, 2013
Tunable Bandpass Filter Circuit Diagram
One of the difficulties in the design of higher-order tunable bandpass filters is achieving correct tracking of the variable resistors in the RC networks. The use of switched capacitor networks can obviate that difficulty, as is shown in this filter. The filter can be divided roughly into two stages: an oscillator that controls the electronic switches arid the four phase-shift networks that provide the filtering proper.
Tunable Bandpass Filter Circuit Diagram
The oscillator, based on a 555, generates a pulsating signal whose frequency is adjustable over a wide range: the duty factor varies from 1:10 to 100:1. Electronic switches ESI through ES4 form the variable resistors whose value is dependent on the frequency of the digital signal. The operation of these switches is fairly simple. When they are closed, their resistance is about 60 ; when they are open, it is virtually infinitely high. a switch is closed for, say, 25% of the time, its average resistance is therefore 240 . `Varying the open:closed ratio of each switch varies the equivalent average resistance.
The switching rate of the switches must be much greater than the highest audio frequency to prevent audible interference between the audio and the clock signals. The input signal causes a given direct voltage across CI, so the op amp can be operated in a quasisym-metric manner, in spite of the single supply voltage. The direct voltage is removed from the output signal by capacitor C10. The fourth-order filter in the diagram can be used over the entire audio range and it has an amplification of about 40, although this depends to some extent on the clock frequency. The bandwidth depends mainly on the set frequency. The circuit draws a current of not more than 15 mA.
Sunday, July 28, 2013
Electric Wiring Fuseboxhouse Stock Photo 27569707
Way Switch Wiring Diagram Variation 3 Electrical Online.
Electrical Wiring Diagram Bathroom.
250 And 525 Sx Mxc Exc Electrical System And Wiring Diagram Here.
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Outdoor Lighting Wiring Diagram 2 Gang Switch.
Electric Wiring And Fusebox In A House Stock Photo 27569707.
Typical Ac Panel Wiring Diagram.
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