Circuit Diagram

The 875p computer main board circuit (094)

Published:2011/6/10 1:33:00 Author:Seven | Keyword: main board

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The over-current protection circuit of thyristors

Published:2011/6/9 0:11:00 Author:Seven | Keyword: over-current protection circuit, thyristor

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The transistor over/low-voltage protection circuit

Published:2011/6/9 0:12:00 Author:Seven | Keyword: over/low-voltage, protection circuit

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The nonpolarity charging circuit

Published:2011/6/9 0:13:00 Author:Seven | Keyword: charging circuit

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The switch power supply circuit of single chip microcomputers and developing devices

Published:2011/6/10 1:34:00 Author:Seven | Keyword: power supply circuit, single chip microcomputers

This text is to introduce a switch power supply which is used in the developing devices of single chip microcomputers or lab electric devices. This circuit characterizes stable output, adjustable voltage, small size, steady functions and so on. The output switch power supply output is 1.8A, the output voltage ranges +15v~+5v which can be set, and the input voltage is fit for the power supply of AC90v~240v 50/60HZ, so it can provides with power for lab electric experiment measuring devices, and it can also be used to charge the battery of 6v/12v.   (View)

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The FAW Toyota-Reiz engine control diagram (2)

Published:2011/6/9 0:16:00 Author:Seven | Keyword: Toyota-Reiz, engine control

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The Faw Toyota-Reiz ignition system circuit

Published:2011/6/9 0:22:00 Author:Seven | Keyword: Toyota-Reiz, ignition system

See as the figure. The Faw Toyota-Reiz ignition system circuit   (View)

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The on-line tester circuit of diodes and triodes

Published:2011/6/10 1:36:00 Author:Seven | Keyword: on-line tester, diodes and triodes

In the circuit is the on-line tester circuit of diodes and triodes. The tester consists of the multi-resonate oscillator and single steady trigger centralized on the dual time-based 556 circuit, LED1 and LED2, etc.The multi-resonate oscillator consists of half of 556, R1 and C1, etc, whose oscillating frequency is f=1.44/R1C1. The single steady trigger consists of the other half of 556, by which the output poles of 5-pin and 9-pin output a couple alternating square wave testing signals, and the couple of signals have opposite polarities and the peak voltage is 9v, the frequency is 5Hz.   (View)

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The FAW Toyota-Reiz engine control diagram (1)

Published:2011/6/10 1:35:00 Author:Seven | Keyword: Toyota-Reiz, engine control

See as the figure, this is the FAW Toyota-RuiZhi engine control diagram (1)   (View)

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The Faw Toyota-Reiz cooling fan diagram

Published:2011/6/9 0:18:00 Author:Seven | Keyword: Toyota-Reiz, cooling fan

See as the figure. The Faw Toyota-Reiz cooling fan diagram   (View)

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precision bridge isolation and measurement amplifier circuit

Published:2011/5/15 1:04:00 Author:John | Keyword: isolation and measurement amplifier circuit, precision bridge

Bridge isolation and measurement amplifier circuit is widely used for industrial process control, which is composed of ISO102 and INA102 with low noise and low power comsuption. Just as shown in the figure. ISO102 is capacitor coupled buffer and isolation amplifier circuit, having a gain of 1000. It is mainly used for 300Ω bridge signal amplification. The power supply of a bridge is completed by the two parts. One is that the supply side(INA102 12 feet) provides l4mA current through the 680Ω resistor, the other is that the +5 V reference from the ISO102 incentive provides 2.7mA current. The plused 16.7mA current powers the bridge. Changing signal of the bridge can be directly input to the differential input point of INA102. It can achieve isolation amplifier of both bridge signal and output voltage Uo. The measurement circuit is powered by PWS725A or PWS726A and other DC / DC conversion devices. So the implementation of no common ground and no total power supply can be achieved in isolated parts. The circuit can be directly used for accurate measurement of direct pressure, weight and physical strain and so on.   (View)

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universal dual power quad op-amp circuit

Published:2011/5/15 1:06:00 Author:John | Keyword: dual power, quad op-amp

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integrated circuit typical application circuit

Published:2011/5/15 1:01:00 Author:John | Keyword: Typical application circuit, integrated circuit

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dual power three op-amp with high input impedance circuit

Published:2011/5/15 0:57:00 Author:John | Keyword: dual power, three op-amp, high input impedance

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LDQ852-1Integrated inside circuit box circuit

Published:2011/5/27 7:10:00 Author:John | Keyword: Integrated circuit, inside circuit box

LDQ852-1 integrated circuit mainly consists of an audio oscillator Fl and a frequency divider with grade four trigger. Power regulator II can regulate the power voltage between 3.5V-4.2V, which is able to actuate vibrato generator F2. Vibrato generator F2 is a low frequency oscillator, whose external components determine the frequency of the vibrato. Power regulator I can regulate the power voltage between 3.8V-4.5V, which is used to drive the scale generator and requency divider to work. The inside circuit box circuit has been shown.   (View)

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The electric adjuster circuit of touch fans

Published:2011/6/10 0:54:00 Author:qqtang | Keyword: electric adjuster, touch fans

The working principle of the circuitThe adjuster circuit consists of the integrated circuit IC, two-way thyristor VT and external elements, see as figure 1. When it is in the mains of 200v, the speed regulator is starting to work, but the two-way thyristor is blocked and the fan motor M is still. When the hand touches the electrode plate and the touching time is not less than 0.4s, the 8-pin if IC outputs a solid high LEV, then the thyristor is conducting and M begins to run. However, the speed regulator just works as a switch.   (View)

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The integrated amplifier circuit of TDA6107JF single chip video

Published:2011/6/4 2:27:00 Author:qqtang | Keyword: amplifier circuit, single chip

TDA6107JF is an integrated amplifier circuit of TDA6107JF single chip video, which is widely used in all kinds of local and imported big screen color TV as the terminal amplifier. 1.function features TDA6107JF contains a video amplifier circuit(i.e R,G and B, 3 ways of primary colour amplifier), black current generating circuit and other additional function circuits, etc. 2.pin functions and dataTDA6107JF is in a 9-pin single line package, whose pin functions and data are listed in Table 1.Table 1. Pin functions and data of TDA6107JF   (View)

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SSM2250 multi-function low-power amplifier integrated circuit

Published:2011/6/10 0:54:00 Author:qqtang | Keyword: multi-function, low-power amplifier

1.function featuresSSM2250 includes 3 full amplitude(output amplitude value is close to that of power supply) computing amplifiers, kluck and Ping sound removing bias circuit and switch control circuit, etc. Its internal circuit is shown in the figure. The internal circuit of SSM22502.pin functionsSSM2250 has two kinds of packages: 10-pin MSOP and TSSOP, whose pin sequence is shown in the figure, and the two packages with their relationship and the pin functions are listed in the table.   (View)

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SM5875BM—the D/A shift integrated circuit

Published:2011/6/10 0:56:00 Author:qqtang | Keyword: D/A shift, integrated circuit

1.function featuresSM5875BM includes 8-time over sampling digital filter and stimulating signal low-pass filter, which consists of serial data input connector, digital filter diminish control circuit, 3 stage noise rectifier circuit, attenuation counter, sequence controller, PWM data generator, clock generating circuit and analog signal low-pass filter, etc. Its functions include digital signal deemphasis, digit or volume attenuation, silence/mute, standard/multiple mode selecting and low-voltage power supply. Its internal circuit is shown in the figure.   (View)

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The outline circuits of some digital boards

Published:2011/6/10 0:56:00 Author:qqtang | Keyword: outline circuit, digital board

The digital board consists of special integrated circuits, highly stable reference power supply and digital display components. The digital board characterizes high precision, strong antijamming capability, good reliability, wide working temperature and convenient installation, which is a replacement of the pointer type. The digital board can be directly used in all kinds of electricity parameter tests, such as working with sensors, and it can also be used in non-electricity parameter tests, such as military strength, temperature and movement,etc. Figure: The outlines of some digital boards   (View)

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