Published:2011/6/10 1:10:00 Author:Seven | Keyword: chat transfer, collinear phones
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Published:2011/6/10 1:27:00 Author:Seven | Keyword: electric mouse killer
It is said that mice are sensitive to magnetic field, which is why common high-voltage girds have bad effects on killing mice. The mice killer in the text has no high voltage ordinarily, so it won't cause the warning of mice, however, once mice touched the grid, the grid would generates a high voltage and kill the mice quickly. See as the figure, 1B is a separating and boost transformer. As the grid takes the earth as a pole, to prevent the mains protector from mistaking actions, the transformer is separated from the mains circuit. (View)
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Published:2011/6/10 1:19:00 Author:Seven | Keyword: phone wire, distributor
MCK100
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Published:2011/6/10 1:11:00 Author:Seven | Keyword: principle diagram, IC reader/writer
This is a IC card and its reader/writer circuit, in which the reader/writer consists of a MPU, key board, display, supervision circuit and so on. The IC card is X76F100Y of XICOR.
2.1 the IC and its connectorX76F100 is a secure series FLASH E2PROM of 128*8 bit, of which either of the reader code and encoder code is 64 bit. The package pin of the smart card is as shown in Figure 2. The chip is packaged on a card, and the card is inserted into the connector of the IC reader, then the reader/writer and fulfills functions of encodeing, checking, saving,withdrawing and so on. (View)
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Published:2011/6/10 1:12:00 Author:Seven | Keyword: hardware, principle circuit
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Published:2011/6/10 1:13:00 Author:Seven | Keyword: principle circuit
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Published:2011/6/10 1:20:00 Author:Seven | Keyword: principle circuit
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Published:2011/6/10 1:20:00 Author:Seven | Keyword: principle circuit
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Published:2011/6/10 1:22:00 Author:Seven | Keyword: MP3 hardware
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Published:2011/6/10 1:22:00 Author:Seven | Keyword: MP3 circuit
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Published:2011/6/10 1:26:00 Author:Seven | Keyword: Aiwa walkman
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Published:2011/6/10 1:27:00 Author:Seven | Keyword: massager circuit
The massager circuit of SCH (View)
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Published:2011/6/10 1:28:00 Author:Seven | Keyword: USB multi-media
Brief description: it doesn't need an external power supply or a sound card, and the cost is 20 yuan.
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Published:2011/6/10 1:29:00 Author:Seven | Keyword: sound circuit
Pin functions and reference voltage of TDA7057: 1-pin:0~1v----DC sound volume control 12-pin:0v----empty3-pin:2v----input 14-pin:19v----power supply5-pin:2v----input 26-pin:0v----signal GND7-pin:0~1v--DC sound volume control 28-pin:8.6v----positive output 29-pin:0v----power amplifier GND 210-pin:8.6v----negative output 111-pin:8.6v----negative output 212-pin:0v----power amplifier GND13-pin:8.6v----positive output 1 (View)
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Published:2011/6/10 1:29:00 Author:Seven | Keyword: sound circuit, color TV
TDA2009I-pin:1.2v----left channel input; 2-pin:0.8v----left channel feedback; 3-pin:12v----mute/noisy;4-pin:0.8v----right channel feedback; 5-pin:1.2v----right channel feedback; 6-pin:0v----ground; 7-pin:0v----empty; 8-pin:12.4v----right channel output; 9-pin:24v----power supply; 10-pin:12.4v----left channel output;11-pin:---- (View)
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Published:2011/6/10 1:30:00 Author:Seven | Keyword: sound circuit
This circuit is from Changhong C2191, which is of OTL dual-channel connectionPin functions and reference voltage of TDA1521:1-pin:11v----backward input(L channel signal input);2-pin:11v----forward input 1;3-pin:11v----reference 1(it's 0v when it is in OCL connection, and it's 1/2Vcc when it's in OTL connection );4-pin:11v----ouput 1(L channel signal output);5-pin:0v----negative power supply input(it connects with the earth when it is in OTL connection ); 6-pin:11v----output 2(R channel signal output);7-pin:22v----positive power supply input; 8-pin:11v----positive input (View)
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Published:2011/6/10 1:30:00 Author:Seven | Keyword: sound circuit
Pin functions and reference voltage of TDA10131-pin:0v----earth;2-pin:7.7v----sound output; 3-pin:16v----power supply; 4-pin:13.5v----power supply; 5-pin:0.3v----power supply; 6-pin:6.7v----pre-output; 7-pin:2.8v----sound volume control; 8-pin:1.9v----audio input; 9-pin:0v----earth (View)
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Published:2011/6/10 1:31:00 Author:Seven | Keyword: sound circuit, color TV
Pin functions and reference voltage of TA8218AH1-pin:1.9v----backward input terminal; 2-pin:3-pin:0v----earth; 4-pin:1.9v----backward input terminal;5-pin:2.1v----heavy low-frequency audio signal input;6-pin:2.1v----L channel audio signal input;7-pin:1.9v----backward input terminal;8-pin:8.9v----filter;9-pin:26v----power supply; 10-pin:13v----L channel audio signal output; 11-pin:4.7v----mute;12-pin:4.5v----empty;13-pin:0v----earth; 14-pin:13v----heavy low-frequency audio signal output (View)
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Published:2011/6/10 1:32:00 Author:Seven | Keyword: Sound circuit
Pin functions and reference voltage of AN52651-pin:12V----pre-stage power supply; 2-pin:5v----audio signal input terminal;3-pin:0v----mute control terminal(it's mute when it is in a high LEV);4-pin:0.1V----input terminal of sound volume control voltage;5-pin:7v----wave filter; 6-pin:7.4v----negative feedback input pole; 7-pin:0v----earth; 8-pin:7.5v---- the output pole of power amplifier; 9-pin:15-----power supply of power amplifier (View)
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Published:2011/6/10 1:32:00 Author:Seven | Keyword: door bell
47.The dual sound door bell without batteryAs the popularity rate of phones is higher and higher, more and more homes have domestic phones, however, usage rate is low, therefore, it's economic to use the 48v(60v) DC current of phones as the working energy. Now we introduce a dual sound door bell without battery, the circuit principle is shown in the figure. From the figure, we can see that the circuit is changed from the common circuits of phone rings. a and b are the positive and negative poles of phone wires, respectively.
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