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Index 274

Main schematic circuit diagram of high-voltage power supply

Published:2011/3/24 21:26:00 Author:muriel | Keyword: Main schematic circuit diagram , high-voltage power supply

Main schematic circuit diagram of high-voltage power supply
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System chart of high-voltage power supply

Published:2011/3/24 21:29:00 Author:muriel | Keyword: System chart, high-voltage power supply

System chart of high-voltage power supply
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Samsung SAMSANG5508/7508 type color display switching power supply (DPl04P) circuit diagram

Published:2011/3/29 21:03:00 Author:Rebekka | Keyword: color display switching

Here is the schematic diagram of the Samsung SAMSANG5508/7508 type color display switching power supply (DPl04P)circuit: (View)

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SHARP K-160170 type display circuit diagram

Published:2011/3/29 21:01:00 Author:Rebekka | Keyword: Display circuit

Here is the schematic diagram of the SHARP K-160170 type display circuit: (View)

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Panasonic TC-43P18G rear projection TV power supply circuit diagram

Published:2011/3/29 21:00:00 Author:Rebekka | Keyword: Panasonic, rear projection TV

Here is the schematic diagram of the Panasonic TC-43P18G rear projection TV power supply circuit: (View)

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Changhong HP5188 rear projection TV power supply circuit diagram

Published:2011/3/29 20:57:00 Author:Rebekka | Keyword: Changhong HP5188, rear projection TV

Here is the schematic diagram of the Changhong HP5188 rear projection TV power supplycircuit: (View)

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Buck chopped wave switching power supply circuit diagram

Published:2011/3/24 21:42:00 Author:Nicole | Keyword: switching power supply

This is a buck chopped wave switching power supply circuit diagram. When the switching element VT is controlled as saturated conduction, the energy is stored in inductor L and capacitor C, and also is fed to the load. When the switching element VT is controlled as cut-off state, the energy stored in inductor and capacitor continue to supply the load, the diode VD constitute a current loop. Because of the switching element VT in series with the load resistor RL, so it is called series switching power supply. Chopped wave switching power supply is a DC power supply, can obtain unidirectional square wave from switch circuit, and then can get a different steady DC which is different from the input voltage after filtered. The buck is whether the input voltage Ui is positive or negative, the output voltage Uo is always lower than the input voltage Ui, that is | Uo | ≤ | Ui |. If the adjustment switching element VT has been conducting, the off-time is zero, then Uo = Ui; if VT has been cut-off, on-time is zero, then Uo = 0V. As the ratio of ton and toff is different, the output voltage Uo is between O ~ Ui. (View)

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Polarized absorption circuit-RLD network

Published:2011/3/21 1:26:00 Author: | Keyword: RLD network

Polarized absorption circuit-RLD network
We can see from the table, relatively with parallel RCD network is series RLD network, this network is a polar opening absorption circuit. The components of RLD network are: Lv inductor and an Rv-Dv series branch parallel as shown. absorber circuit nonpolarity absorber circuit heteropolarity absorber circuit turn off absorb Parallel Cv, du v/dt=Io/Cv Parallel RCD(Rv, Dv Parallel, and serial with Cv) open up absorb serial Lv, di v/dt=Ui/Lv serial RLD(Rv, Dv in serial, and Parallel with Lv) The role of Rv-Dv series branch is in the process of shut off the switching tube, the electric energy stored in Lv can be released through the Rv-Dv series slip, avoided the switching tube was damaged due to the high voltage. (View)

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LTC732 pins arrangement diagram

Published:2011/4/6 2:38:00 Author:Nicole | Keyword: pin arrangement

LTC732 pins arrangement diagram

LTC732 is a lithium ion battery constant current/ constant voltage linear charge controller, it is produced by Linear Technology company. It also can constant current charge to nicad and Ni-MH battery, the pins arrangement diagram is shown as below: The internal structure is shown as below: (View)

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Computer serial interface state indication circuit

Published:2011/4/6 1:10:00 Author:Nicole | Keyword: Computer, serial interface

Computer serial interface state indication circuit
This circuit is simple in structure, only has 6 resistances, 2 transistor and 2 LED, it is used to the computer RS-232 serial interface state indication, when D1 lights up, it means logic 0 , the interface circuit voltage is about 4.5~5.5V; when D2 lights up, then in the 1 state, the interface circuit voltage is about -7.0~-5.5V. When it is static, the power consumption is about 150μA; when there is a singal, the power consumption is about 27mA. (View)

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Computer photoelectric isolation interface circuit

Published:2011/4/6 1:23:00 Author:Nicole | Keyword: computer, photoelectric isolation, interface

Computer photoelectric isolation interface circuit
This circuit uses optocoupler to isolate the computer and peripheral device. IC2 is CCD; IC1 is threshold comparator, threshold voltage is adjusted by P1; R2, C2 form low-pass filter, to prevent IC1 from false triggering. When TTL output is in the 0 state, to light up the primary of IC2, then its secondary turn-on, made IC1 output is in the 1 state, conversely, output is in the 0 state. (View)

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Multipurpose exposure timing circuit

Published:2011/4/6 1:46:00 Author:Nicole | Keyword: multipurpose, exposure, timing

Multipurpose exposure timing circuit
This device can satisfy photographic fans to master proper exposure, to ensure the quality of photos. It has the functions of high precision timing, wide common use, exposure timing, dimming, voltage regulation and so on. Amplifier bulb or electric iron, heating blanket, lamp, electric fan, motor and electrical equipments can connect to the output socket CZ, the output power is limited by controlled slicon capacity, if it is pure resistance load, then it can provide 600W power; if it is capacitive or inductive load, the output power is lower than 300W. (View)