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Index 1464

The power ground connection, fault indicator and data connector circuit of the 2.0L(L34) engines

Published:2011/7/20 3:54:00 Author:Borg | Keyword: power ground connection, fault indicator, data connector

figure 1. The power ground connection, fault indicator and data connector circuit of the 2.0L(L34) engines of Shanghai GM Buick-Regal (View)

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The camshaft position, crank axle and igniting coil circuit of 2.0L(L34) engine

Published:2011/7/20 3:49:00 Author:Borg | Keyword: camshaft position, crank axle, igniting coil

figure1. The camshaft position, crank axle and igniting coil circuit of 2.0L(L34) engine of Shanghai GM Buick-Regal (View)

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The 2.0 L（L34）engine cooling and idle speed air temperature sensor circuit

Published:2011/7/20 3:46:00 Author:Borg | Keyword: idle speed, air temperature sensor

The 2.0 L（L34）engine cooling and idle speed air temperature sensor circuit
Figure 1. The 2.0 L（L34）engine circuit of Shanghai GM Buick-Regal--air-conditioning pressure sensor, throttle position sensor, admission MAP sensor, engine cooling temperature sensor and idling speed air temperature sensor (View)

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The 2.0 L（L34）engine evaporation emitting circuit

Published:2011/7/20 3:41:00 Author:Borg | Keyword: evaporation emitting

Figure 1. The 2.0 L（L34）engine evaporation emitting circuit of Shanghai GM Buick-Regal (View)

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The 2.0L(L34) engine idle speed air control, oil position switch and pressure display circuit

Published:2011/7/20 3:38:00 Author:Borg | Keyword: idle speed, oil position switch

Figure1 The 2.0L(L34) engine idle speed air control, oil position switch and pressure display circuit of Shanghai GM Buick-Regal (View)

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The division circuit for ratio calculation

Published:2011/7/14 23:04:00 Author:Fiona | Keyword: ratio calculation

The division circuit for ratio calculation

Circuit function This circuit is the division circuit that the input signal Z is divided by X. Besides operating EO = 10Z / (-X) and calculating the ratio or percentage,it also can be used as AGC amplifier (A=1/X） which inputs control voltage from the X side. But it can't do large-scale operations. If the input X as the denominator turns smaller, 1 / X will increase,.When X = 0, the gain is infinite, so for division, the range is limited. Circuit work If the IC is used as a multiplication, the output voltage feedbacks to the Y input, does the 1 / X calculation, and then multiplies by Z. Because of adding a multiplication unit in the OP amplifier feedback loop, the X input turns smaller so that the circuit would become unstable. and the X values are different, closed-loop frequency characteristics will change because of X's different values. Pay attention to use it. Z-ended input signal has been inverted in the output, the X input only can use the negative voltage . When X = 10V,the circuit uses VR2 to adjust scaling factor to make A = 1. It also can use VR2 to do disorders adjustment of dynamic range of the division circuit.After reducing the variable range, in order to facilitate adjustment, it addsvoltage divider circuit composed of the R1, R2. Input 1V from Z,input 1V from X, adjust VR1 to make the output to be -10V (A =- 10).when Z = 0.1V, X =- 0.1V,it also can get 10V output, but it can not guarantee the accuracy and stability Degrees. In addition, the frequency response changes with the value which is inputed from X.This point also should be noted. (View)

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Telephone and facsimile apparatus protection circuit

Published:2011/7/11 2:51:00 Author:Fiona | Keyword: Telephone and facsimile apparatus, protection

Telephone and facsimile apparatus protection circuit is shown as above,due to the exterior line often appears instantaneous high voltage to result in the damage of the telephone,the facsimile apparatus and so on.In view of this situation,this protection circuit can effectively prevent the damage of the telephone and the facsimile apparatus because of lightning stroke and line's accidental over-voltage.The circuit has no affect on telephone and facsimile apparatus completely. The transistor VD is 9013 and β = 65-115;Directional triode thyristor VS is SAC616;Resistor is the RJ type,nominal power is 0.25 ~ 0.5W on average. (View)

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Tiida-BL remote control door system circuit Figure 1

Published:2011/7/14 23:18:00 Author:Fiona | Keyword: remote control, door system

Tiida-BL remote control door system circuit Figure 1
(View)

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Tiida-BL remote control door system circuit

Published:2011/7/14 23:17:00 Author:Fiona | Keyword: remote control, door system

Tiida-BL remote control door system circuit
(View)

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Tiida rear window demister circuit Figure 2

Published:2011/7/14 23:17:00 Author:Fiona | Keyword: rear window demister

Tiida rear window demister circuit Figure 2
(View)

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Single stage PFC high brightness LED driver circuit achieving 700 mA current

Published:2011/7/19 8:49:00 Author:Fiona | Keyword: Single stage, high brightness, driver

Single stage PFC high brightness LED driver circuit achieving 700 mA current

Figure is single-stage PFC LED driver power supply.With the increasing use of LED,especially extensive use of the offline type switch power supply composed of a sample circuit,it surely makes the power grid's power factor severely reduce and the power grid's reactive power consumption increase finally.Therefore increasing the switching power supply power factor and reducing harmonic current have become the development direction of LED lighting power supply in the future.This section describes using the falling rise and fall without transformer single-stage circuit,it can provide high conversion efficiency,it is low-cost,high reliability and high-power LED driver power supply. (View)

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Tiida rear window demister circuit Figure 1

Published:2011/7/14 23:18:00 Author:Fiona | Keyword: rear window demister

Tiida rear window demister circuit Figure 1
(View)

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relay drive circuit on low power supply voltage

Published:2011/7/14 23:16:00 Author:Fiona | Keyword: relay drive, low power supply voltage

relay drive circuit on low power supply voltage
V1 is unijunction transistor BT33C,it composes the relaxation oscillator with R1, R2, R3 and C1,SCR is one-way controlled silicon,when press the start button AN1,the circuit is energized,because the SCR has no trigger voltage,the circuit is not conducted,the relay J doesn't move,the power charges the capacitor C2 to close to supply voltage through R4 and VD1(Vcc-VD1 drops).Meanwhile,the power R1 charges the capacitor C1. After a few seconds,the C1's voltage is charged to close to the trigger voltage of V1, C1 discharges immediately through V1 and forms a positive pulse on the R3, this pulse is all the way added to the V2 base to make the V2 be quickly saturated conducted,V2 collector namely capacitance C2 positive closes to ground. (View)