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The 875p computer main board circuit (103)

Published:2011/6/5 1:30:00 Author:Seven | Keyword: main board

The 875p computer main board circuit (103)
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The 875p computer main board circuit (097)

Published:2011/6/5 1:49:00 Author:Seven | Keyword: main board

The 875p computer main board circuit (097)
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The 875p computer main board circuit (099)

Published:2011/6/5 1:29:00 Author:Seven | Keyword: main board

The 875p computer main board circuit (099)
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The 875p computer main board circuit (100)

Published:2011/6/5 1:27:00 Author:Seven | Keyword: main board

The 875p computer main board circuit (100)
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The 875p computer main board circuit (101)

Published:2011/6/5 1:25:00 Author:Seven | Keyword: main board

The 875p computer main board circuit (101)
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The ultrasonic ranging circuit

Published:2011/6/3 9:29:00 Author:Seven | Keyword: ultrasonic ranging

The ultrasonic ranging circuit
The circuit in Figure 9.12 can be used to measure the distance of 10mm~3m. This circuit is made of LM1812 special integrated chip, the external circuit is like the circuit in Figure 9.11-2, the secondary coil of transformer T and the 500pF capacitor of C1 are modulated in the frequency of 50~60kHZ, while L1 is also in it. From the oscilloscope, we can see the maximum echo sensitivity on 1-pin. The step-up transformer t1 can provide with a bias voltage of 150v for the matrix converter.   (View)

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The 875p computer main board circuit (104)

Published:2011/6/5 1:32:00 Author:Seven | Keyword: main board

The 875p computer main board circuit (104)
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The 875p computer main board circuit (105)

Published:2011/6/5 1:33:00 Author:Seven | Keyword: main board


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The 875p computer main board circuit (106)

Published:2011/6/5 1:35:00 Author:Seven | Keyword: main board

The 875p computer main board circuit (106)
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The 875p computer main board circuit (107)

Published:2011/6/5 1:36:00 Author:Seven | Keyword: main board

The 875p computer main board circuit (107)
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ATMEL AT89C51SND1 MP3 principle circuit

Published:2011/6/5 1:20:00 Author:Seven | Keyword: principle circuit

ATMEL AT89C51SND1 MP3 principle circuit
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The sound circuit:LA4225A

Published:2011/6/3 9:37:00 Author:Seven | Keyword: sound circuit

The sound circuit:LA4225A
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The ultrasonic wave receiver circuit

Published:2011/6/5 21:06:00 Author:Seven | Keyword: ultrasonic wave

The ultrasonic wave receiver circuit
Figure 9.7 shows a receiver circuit of high sensitivity. The signals, which are received from the microphone UW, is magnified to 1000 times by NE542V. And the output is rectified by VD1 and VD2 into a DC, finally, it takes actions by the VMOS transistor controller. The output current of VMOS transistor can reach 2A. Therefore, large load can be driven, such as the magnetic valve, high-power light and so on.   (View)

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the drinking water machine, Samsung 57c2304,with LCD display

Published:2011/6/5 20:56:00 Author:Seven | Keyword: drinking water machine

the drinking water machine, Samsung 57c2304,with LCD display
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The MP3 circuit (02)

Published:2011/6/3 8:21:00 Author:Seven | Keyword: MP3 circuit

The MP3 circuit (02)
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The MP3 circuit (1)

Published:2011/6/3 7:59:00 Author:Seven | Keyword: MP3 circuit

The MP3 circuit (1)
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The MP3 hardware circuit (02)

Published:2011/6/3 8:18:00 Author:Seven | Keyword: MP3 hardware

The MP3 hardware circuit (02)
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The MP3 hardware circuit (03)

Published:2011/6/3 8:19:00 Author:Seven | Keyword: MP3 hardware circuit

The MP3 hardware circuit (03)
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The MP3 hardware circuit (01)

Published:2011/6/3 7:51:00 Author:Seven | Keyword: hardware circuit

The MP3 hardware circuit (01)
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the MP3 circuit (6)

Published:2011/6/3 7:56:00 Author:Seven | Keyword: MP3 circuit

the MP3 circuit (6)
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