Published:2011/6/22 19:55:00 Author:chopper | Keyword: principle, Glanz, microwave oven
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Published:2011/6/22 19:59:00 Author:chopper | Keyword: capacitive, step-down, LED, driving
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Published:2011/6/22 20:02:00 Author:chopper | Keyword: subterranean cable, detection circuit, radio
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Published:2011/6/22 20:48:00 Author:chopper | Keyword: work performance, test circuit, three-terminal, integrated regulator circuit
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Published:2011/6/22 20:50:00 Author:chopper | Keyword: quartz crystal, pick circuit
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Published:2011/6/22 20:55:00 Author:chopper | Keyword: aluminium electrolytic capacitor, conditioning circuit
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Published:2011/6/22 21:00:00 Author:chopper | Keyword: 0-433V voltage, star-star connection, 3 boosters
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Published:2011/6/20 6:09:00 Author:chopper | Keyword: 0.1C5A, standard nickel-cadmium battery, charger circuit
The following circuit makes use of the constant-current characteristic of capacitor and adopts pulsant direct current source to charge.Its effect is greater than pure DC,and it can charge one or more nickel-cadmium batteries.
(View)
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Published:2011/6/16 0:48:00 Author:chopper | Keyword: power follower
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Published:2011/6/14 8:27:00 Author:chopper | Keyword: automobile, burglary-resisting system
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Published:2011/6/16 22:14:00 Author:chopper | Keyword: transient state, luminance, improvement, integrated circuit
TAl226NA is a transient state of luminance improvement integrated circuit,and it is applied to various large-screen colour TVs to improve the transient state of luminance.Its function and data of pins of the integrated circuit are shown as chart 1.
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Published:2011/6/16 22:07:00 Author:chopper | Keyword: charger
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Published:2011/6/16 1:10:00 Author:chopper | Keyword: TTL, integrated door
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Published:2011/6/25 20:43:00 Author:qqtang | Keyword: emitter circuit
BA1404 is the special integrated circuit of FM stereo sound, as the working feature is good, it is also used in wireless control. BA1404 needs a low power supply voltage, its power is also low, and its structure is completed, it needs a few external elements, and finally, it works stably and reliably. The notes of using BA1404 are listed as follows: (1) to keep the frequency feature of the emitter conforming to that of the FM broadcast receiver, we need to fix a pre-emphasizer whose time constant is 50μs in the left and right channel, see as the figure.
Figure: The emitter circuit composed of BA1404 (View)
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Published:2011/6/25 20:30:00 Author:qqtang
Figure: The TS26 principle circuit (View)
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Published:2011/6/25 20:29:00 Author:qqtang | Keyword: dual polarity, power supply
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Published:2011/6/25 20:28:00 Author:qqtang
Figure: The μPC1373H/HA typical application circuit (View)
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Published:2011/6/25 20:26:00 Author:qqtang | Keyword: logic frame
Figure: The YN9101 logic frame circuit (View)
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Published:2011/6/25 20:25:00 Author:qqtang | Keyword: FET pipe, timing flash circuit
With the figured circuit, we can compose a circle light timing control circuit with a few elements. The circuit consists of the MOS time-base circuit 7555, CMOS decimal counter(pulse distributor) 4017 and end stage VMOS power transistor. The power transistor controls the bulb whose maximum current is 2A. The resistor RV between the bulb and the power supply +UH is used to limit the connected current.
The time-base frequency is adjusted by the potentiometer (about 0.5~10HZ). The 9 stage circling storage is controlled by the square wave output signal with the help of the clock. (View)
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Published:2011/6/26 1:03:00 Author:Vicky | Keyword: Ten-Channel Temperature Patrol Detecting
Temperature Sensor adopts 3AX31 and is in the form of diode. When the temperature changes, the resistance K presents linear variation.
Oscillator is composed of IC1 (555), rce, R1, and C1 etc. The frequency is: f=1.44/(R1+2rce)C1. Therefore, the rce presents linear variation with the changing of temperature, and f also varies proportionally to realize the conversion of temperature and frequency. If ten spots are to be tested, then 10 temperature-frequency converters are needed.
In the circuit, IC2 adopts hex inverter CD4069, and F1,F2,F3 make up trigger generator of 0.2 Hz, that is to send a count pulse CP to the count circuit IC3 every 5 seconds. (View)
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