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Computer Mainboard Circuit 440LX2_07

Published:2011/6/24 1:51:00 Author: | Keyword: Computer Mainboard, 440LX2_07

Computer Mainboard Circuit 440LX2_07
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Computer Mainboard Circuit 440LX_09

Published:2011/6/24 3:26:00 Author: | Keyword: Computer Mainboard, 440LX_09

Computer Mainboard Circuit 440LX_09
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Computer Mainboard Circuit 440LX_10

Published:2011/6/24 3:25:00 Author: | Keyword: Computer Mainboard, 440LX_10

Computer Mainboard Circuit 440LX_10
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Computer Mainboard Circuit 440LX_11

Published:2011/6/24 3:23:00 Author: | Keyword: Computer Mainboard, 440LX_11

Computer Mainboard Circuit 440LX_11
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Computer Mainboard Circuit 440LX_12

Published:2011/6/24 3:22:00 Author: | Keyword: Computer Mainboard, 440LX_12

Computer Mainboard Circuit 440LX_12
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Computer Mainboard Circuit 440LX_13

Published:2011/6/24 3:20:00 Author: | Keyword: Computer Mainboard, 440LX_13

Computer Mainboard Circuit 440LX_13
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Computer Mainboard Circuit 440LX_14

Published:2011/6/24 3:19:00 Author: | Keyword: Computer Mainboard, 440LX_14

Computer Mainboard Circuit 440LX_14
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Computer Mainboard Circuit 440LX_15

Published:2011/6/24 3:18:00 Author: | Keyword: Computer Mainboard, 440LX_15

Computer Mainboard Circuit 440LX_15
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Computer Mainboard Circuit 440LX_16

Published:2011/6/24 3:10:00 Author: | Keyword: Computer Mainboard, 440LX_16

Computer Mainboard Circuit 440LX_16
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Computer Mainboard Circuit 440LX_17

Published:2011/6/24 3:04:00 Author: | Keyword: Computer Mainboard, 440LX_17

Computer Mainboard Circuit 440LX_17
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Computer Mainboard Circuit 440LX_18

Published:2011/6/24 3:03:00 Author: | Keyword: Computer Mainboard, 440LX_18

Computer Mainboard Circuit 440LX_18
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optically controlled timing street light circuit

Published:2011/6/22 9:44:00 Author:Nancy | Keyword: optically controlled, timing street light

The circuit shown is a optically controlled timing street light circuit which indicates that the illuminating lamp can work automatically several hours at dusk and then automatically extinguish. After dark, the BG4 conducts under the optoelectronic switch, the oscillator circuit formed by IC turns on, the ③ of IC1 outputs pulse continuously. For the charging time constant is large with the oscillating period of the oscillator circuit T ≤R7C3, the voltage of C3 is 1/3VCC at the beginning of operation, the ③ output of IC2 is high level, triggering SCR to conduct, both ends of lamp ZD energize and glow. (View)