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Index 409

The multi-function fan with frogs calling control circuit using LC901

Published:2011/12/6 21:22:00 Author:Ecco | Keyword: multi-function fan , frogs calling , control circuit

The multi-function fan with frogs calling control circuit using LC901
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Multi-function fan with animal sound control circuit using BA3107

Published:2011/12/6 21:45:00 Author:Ecco | Keyword: Multi-function fan , animal sound , control circuit

Multi-function fan with animal sound control circuit using BA3107
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Multi-function fan with nature sound control circuit using BA3106

Published:2011/12/6 21:44:00 Author:Ecco | Keyword: Multi-function fan , nature sound , control circuit

Multi-function fan with nature sound control circuit using BA3106
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Multi-function fan with seashore control circuit using BA3103

Published:2011/12/6 21:43:00 Author:Ecco | Keyword: Multi-function fan , seashore , control circuit

Multi-function fan with seashore control circuit using BA3103
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Multi-function fan with twitter control circuit using BA3102

Published:2011/12/6 21:42:00 Author:Ecco | Keyword: Multi-function fan , twitter , control circuit

Multi-function fan with twitter control circuit using BA3102
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Multi-function fan control circuit using BA3101

Published:2011/12/6 21:40:00 Author:Ecco | Keyword: Multi-function fan , control circuit

Multi-function fan control circuit using BA3101
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Automatic kitchen ventilator circuit

Published:2011/12/6 21:20:00 Author:Ecco | Keyword: Automatic kitchen ventilator

Automatic kitchen ventilator circuit
The circuit isshown in the chart, when thecooking smoke smells heavy,the hood starts automatically to emitsound and light alarm signals ; until the smoke concentration decreases , it will automatically cut off the power of hood M. (View)

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Automatic intermittent lubrication control circuit

Published:2011/12/6 1:47:00 Author:Ecco | Keyword: Automatic, intermittent lubrication , control circuit

Automatic intermittent lubrication control circuit
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DC motor PWM speed control circuit

Published:2011/12/6 1:47:00 Author:Ecco | Keyword: DC motor, PWM speed control

DC motor PWM speed control circuit
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Voice filter circuit using LM387

Published:2011/12/6 1:52:00 Author:Ecco | Keyword: Voice filter

Voice filter circuit using LM387
The filter circuit in the voice frequency range is composed of concatenation elements, and the frequency rangeis 360Hz ~ 3kHz. (View)

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The filter (regulator) circuit for different application areas

Published:2011/12/6 21:04:00 Author:Ecco | Keyword: filter, regulator, different application areas

The filter (regulator) circuit for different application areas

Figure a ~ k show the filters or regulator circuits which can be applied to different frequency bands. It can adjustband-pass in 750Hz ~ 2500Hz. Languageband band-pass fu = 300Hz, f0 = 3500Hz (View)

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The single-phase bridge rectifier Π filter circuit

Published:2011/12/6 21:06:00 Author:Ecco | Keyword: single-phase, bridge rectifier , Π filter

The single-phase bridge rectifier Π filter circuit
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The analog rotary award guessing device circuit

Published:2011/11/30 0:49:00 Author:Ecco | Keyword: analog , rotary , award guessing device

The analog rotary award guessing device circuit
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Several typical application circuits of ND838

Published:2011/11/30 2:17:00 Author:Ecco | Keyword: Several, typical application

Several typical application circuits of ND838
The outputs of the circuits shown in Figure (a), (b), (c), (d) are respectively directly drive the output transistor , SCR , relay , COMS circuit , TTL circuit. (View)