Circuit Diagram

TDA7056A and TDA7056B—the 3.5WBTL audio power amplifier integrated circuit

Published:2011/6/4 8:25:00 Author:qqtang | Keyword: audio power amplifier, integrated circuit

1. Function featuresA few electric parameters of TDA7056A and TDA7056B are different, but their basic are the same, so they can substitute each other. In addition to a power amplifier circuit of 3.5WBTL, the IC can also control the sound volume, protect overheat and protect short circuit, and it characterizes wide voltage range(4.5-18v), few external elements and stable work, etc.2.pin functions and dataTDA7056A and TDA7056B are in 9-pin single line package, whose pin functions and data are shown in Table 1.Table 1. Pin functions and data of TDA705OWB   (View)

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The intelligent voltmeter circuit

Published:2011/6/5 21:31:00 Author:Seven | Keyword: digital voltmeter

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Common Electrical Motor Controlled Circuit (5)

Published:2011/5/27 6:06:00 Author:Sue | Keyword: Common, Electrical, Motor, Controlled

When the circuit is set up, S1 and s2, s3 and s4, s5 and s6 will be put in 3 controlling site. Push s1 in the first site, KM will be connected, M will start working. Push s2 then, KM is released and M stops working. As this principle, push s2 in the second site or push s5 in the third site, KM will be connected and M starts working. Push S4 or S6, KM will also be released and M stops working. This makes the 3-site control of the motor.   (View)

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The internal circuit and pin functions of M37210M4-705SP and its signal flow circuit

Published:2011/6/5 21:24:00 Author:Seven | Keyword: internal circuit, pin functions, signal flow

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The internal circuit of M37221M2-609SP with pin functions and signal flow circuit

Published:2011/6/2 8:03:00 Author:Seven | Keyword: internal circuit, signal flow circuit

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The light energy-saving control circuit

Published:2011/6/5 2:00:00 Author:Seven | Keyword: energy-saving control

The light energy-saving control circuit can make the light be in OFF state in the daytime, when people walk by and make sounds at night, the light is working automatically, and it is power-saving and practical. It is suitable for the corridor lighting. In the following figure is the circuit of the controller.   (View)

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The DC low-voltage switch circuit designed with NE555

Published:2011/6/5 21:19:00 Author:Seven | Keyword: low-voltage switch circuit

VD1－VD4,R1,C1 and C2 of the switch form a rectifier filter circuit. NE555,R2,R3,C4,VD6 and so on form a multi-resonate oscillating circuit, whose frequency is about 20KHz. R4, C3 and VD5 form a step-down steady circuit, which provide the NE555 with a working voltage of 12V. The high power pipe VT1 and the transformer T consist a switch circuit. The working condition of VT1 is controlled by 3-pin of NE555, the conducting time depends on the width of pulses, the pulse width is adjusted by R3. If the pulse width becomes wider, the output voltage is getting higher, and vice versa.   (View)

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TDA6120Q-the integrated circuit of single chip video amplifiers

Published:2011/6/4 7:48:00 Author:qqtang | Keyword: single chip, video amplifiers

TDA6120Q is an integrated circuit of single chip video amplifiers, which is produced by Philips Corp., and it is usually used in local and imported projection color TV, such as Changhong projection color TV.1.function features TDA6120 consists of feedback stage, amplifier circuit, I/V (current/voltage) converter circuit, current source circuit, pre-added heavy net circuit, negative current detection handle circuit, and buffer amplifier circuit and other additional function circuit, etc. The internal circuit of it is seen in Figure 1.   (View)

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The internal circuit of M37210M4--786 and its signal flow circuit

Published:2011/6/5 21:10:00 Author:Seven | Keyword: internal circuit, signal flow

M37210M4786 is in 52-pin dual line package, whose internal circuit and pin fu   (View)

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Common Electrical Motor Controlled Circuit (4)

Published:2011/5/27 6:00:00 Author:Sue | Keyword: Common, Electrical, Motor, Controlled

When Q and S1 are connected, KM KT1 are connected. M begins to work. After a while, KT1's time delay connected contactor is connected and KA KT2 are connected. KM KT1 are released. M stops working. After a while, KT2's time delay disconnected contactor is disconnected and M is released. M and KT1 are connected. M starts working again. When KM is released and M stops working, push button S2, KM will be connected and M will start to work.   (View)

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The internal circuit of M37210M4-786SP with pin functions and signal flow circuit

Published:2011/6/2 8:36:00 Author:Seven | Keyword: internal circuit, pin functions, signal flow circuit

M37210M4786SP is in 52-pin dual line package, whose internal circuit, pin fun   (View)

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The internal circuit of M37221MA-0545SP with pin functions and the signal flow circuit

Published:2011/6/2 7:08:00 Author:Seven | Keyword: internal circuit, pin function

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Common Electrical Motor Controlled Circuit (3)

Published:2011/5/27 5:56:00 Author:Sue | Keyword: Common, Electrical, Motor, Controlled

S1 is starting button, S2 is stop button, S3 is jogging control button. When the circuit is started, Q is connected. S1 is pushed and KM is connected. KM1 KM2 are connected. M begins to work. When S1 is released, KM is still connected. When we stop the circuit, S2 is pushed and KM is released. M stops working. When jogging control is needed, S3 is pushed, KM is connected. M begins to work. When S3 is released, KM is released and M stops working.   (View)

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The voltage stabilizing DC power supply circuit of 5V, 4W switch

Published:2011/6/2 6:58:00 Author:Seven | Keyword: DC power supply

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TDA6107Q-the integrated circuit of the single chip video amplifier

Published:2011/6/4 7:21:00 Author:qqtang | Keyword: integrated circuit, video amplifier

TDA6107Q is an integrated circuit of the single chip video amplifier which is produced by Philips Corp., and it is widely used in large screen color TV.1. Function featuresTDA6107Q consists of 3 lines of primary color(i.e R,G and B) signal amplifiers, it replaces the traditional video amplifiers of 3 separated lines. Its internal circuit is as shown in Figure 1. 2.pin functions and dataTDA6107Q is in 9-pin single-line package, whose pin functions and data are shown in Table 1. Table 1 pin functions and data of TDA6107Q   (View)

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The siren control keyboard circuit

Published:2011/6/2 6:54:00 Author:Seven | Keyword: keyboard circuit

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TDA4859--the integrated circuit of power supply control and scanning signal handling

Published:2011/6/4 8:10:00 Author:qqtang | Keyword: power supply control, scanning signal handling

1.function features TDA4859 contains I2C general connector circuit, power supply fault amplifier circuit, primary current detect circuit of power supply, the output circuit of power supply motivation pulse, the output circuit of motivation circuit, the adjusting circuit of HAFC and distortion, field oscillate and motivate circuit, the handle circuit of travel-field synchronization signal, and travel-field amplitude compensation circuit, etc.2.pin functions and dataTDA4859 is in 32-pin dual-line package, whose pin functions and data are seen in Table 1.   (View)

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The over-current/pressure/heat charging circuit

Published:2011/6/2 6:53:00 Author:Seven | Keyword: over-current/pressure/heat, charging circuit

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TDA4565--the brightness delaying integrated circuit

Published:2011/6/5 3:15:00 Author:qqtang | Keyword: integrated circuit, brightness delaying

TDA4565 is he brightness delaying integrated circuit produced by Philips, which is widely used in local and imported large screen color TV.1. Function features TDA4565 contains two lines of differentiation and integration handle circuits of chromatism (R-Y) and (B-Y) signals, switch storage circuits, clamp circuits, time delay circuits, throttle valve circuits and so on. 2.pin functions and dataTDA4565 is in 18-pin dual in-line package, whose pin functions and data are listed in Table 1.Table 1 the pin functions and data of TDA4565   (View)

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The AC voltage regulation circuit of close-loop control

Published:2011/6/2 6:40:00 Author:Seven | Keyword: voltage regulation, close-loop control

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