Circuit Diagram

Shape and internal wiring circuit diagram of Beijing Cherokee starter relay

Published:2011/5/4 3:02:00 Author:Rebekka | Keyword: Beijing Cherokee , starter relay

Shape and internal wiring circuit diagram of Beijing Cherokee starter relay.   (View)

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LED Open-circuit Protective Circuit

Published:2011/5/3 8:34:00 Author:Joyce | Keyword: LED, Open-circuit, Protective, CP2126

As you can see,italmost has no impact on the receiving sensitivity of mobile phones that whether CP2126 works or not .But if the chip X is at work,the receiving sensitivity would decrease because of the interference caused by EMI . Meanwhile, under the typical condition that CP2126 with a voltage input of 3.6 V drives three white light LED, the conversion efficiency can reach 83% . The design of PCB will also have a great influence on the performance of the circuit. Generally, routings on the part of high frequency should be as short and thick as possible,vias to the ground should be as lagre and abundant aspossible to meet the requirements claimed in the relevant information of CP2126 . In application, LED may happen to have some open fault.In this case, because the feedback voltage of pin CS will keep at 0, so if there is no protective circuit, this kind of boost circuit will boost till the switching tube within gets punctured and breaks down.Therefore, chips without the protection of built-in protective circuit need to add a Zener diode to protect the internal switching tube. The LED open-circuit protection circuit is shown in the graph.It is obvious that such protective circuit will increase the cost of the system and the acreage of PCB . Another method to protect the circuit is to add a pin, use capsulation like SOT23-6L,and sample and detect the voltage of UOUT. Because CP2126 has a built-in output open-circuit protective circuit, it can ensure that the chip would not be damaged in the circumstance that no change has to be done to the peripheral application circuit and LED is open.When malfunction is removed, thechipcan again work properly.   (View)

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880MHz Low Noise Amplification Application Circuit Composed Of RF2347

Published:2011/5/3 20:00:00 Author:Robert | Keyword: 880MHz, Low Noise, Amplification, Application

This pictureshown below is the 880MHz low noise amplification application circuit composed of RF2347. The RF signal is inputed to the 3 foot, and is outputed from 7 foot after amplification in the amplifiers. The 3 footis directly coupled with the internal amplifier, so a 22pF block-DC coupling capacitor is added outside the 3 foot, and therelated resistance would be 50Ω when working at 836MHz. The 7 foot is the output port of the open collector electrode, which can be connected to power Vcc through choke coil or matching inductor. This foot's typical matching resistance is 50Ω, and can be connected to external output-matching networks to suit the amplifier's output resistance, so that can get the maximum output power and efficiency. The 1 foot is for power down control terminal, which is used to control the drift current. When VPD=(2.8±0.1)V (Typical IPD is 8.5mA) the circuit begins to work; when VPD<0.9V the circuit becomes closed; VPD reqiures external RF bypass circuit.   (View)

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Input status indication circuit

Published:2011/5/3 6:53:00 Author:Christina | Keyword: Input status, indication

This circuit monitors the bit data input, and shows H or L on the 7-segment digital display by the conditions. This circuit uses two 7437 inverters and one DL-704 LED common cathode. The diode symbol means one segment of the digital tube (when segment A displaying H or L , the diode symbol means nothing). The 7437 inverter's power connection are: (14) connects to +5V, (7) connects to ground.   (View)

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Beijing Cherokee light off-road vehicle air-conditioning control wiring circuit diagram

Published:2011/5/4 2:51:00 Author:Rebekka | Keyword: Beijing Cherokee, light off-road vehicles

Beijing Cherokee light off-road vehicle air-conditioning control wiring circuit diagram.   (View)

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Beijing Cherokee light off-road vehicles instrument panel lighting wiring circuit diagram

Published:2011/5/4 2:49:00 Author:Rebekka | Keyword: Beijing Cherokee, light off-road vehicles

Beijing Cherokee light off-road vehicles instrument panel lighting wiring circuit diagram.   (View)

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Accord sedan automatic temperature control system circuit diagram

Published:2011/5/4 2:08:00 Author:Rebekka | Keyword: Accord sedan, temperature control system

Accord sedan automatic temperature control system circuit diagram.   (View)

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Beijing Cherokee light off-road vehicles audio and dome light wiring circuit diagram

Published:2011/5/4 2:50:00 Author:Rebekka | Keyword: Beijing Cherokee , light off-road vehicles, audio and dome light wiring

Beijing Cherokee light off-road vehicles audio and dome light wiring circuit diagram.   (View)

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Santana 2000(gasoline injection motor)car air conditioner(continuation)circuit wiring circuit diagram(2)

Published:2011/5/4 2:31:00 Author:Nicole | Keyword: Santana 2000, gasoline injection motor, car air conditioner

123-microswitch; 124-thermostat; 128-air conditioner(H, V, A, C)control switch; 129-warm wind speed range switch(four gears); 130-ventilation system air conditioner resistance; 131-air conditioner warm wind blower; 132-air conditioner relay.   (View)

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Santana 2000(gasoline injection motor)car air conditioner(continuation)circuit wiring circuit diagram(1)

Published:2011/5/4 2:21:00 Author:Nicole | Keyword: Santana 2000, gasoline injection motor, car air conditioner

121-overload relay; 122-overload relay switch; 125-air conditioner compressor electromagnetism clutch; 126-low voltage switch bar; 127-electromagnetic valve of idle speed corrector; 36-high voltage regulator; 139-cooling system relay.   (View)

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Practical two-color LED circuit diagram

Published:2011/5/4 2:46:00 Author:Rebekka | Keyword: Practical two-color LED

The actual circuit of using two-color LED display is shown as above. When input +5 V, VT1 turns on, green LED light; Input is 0, VT2 turns on, red LED light.   (View)

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Measuring small current amplifier circuit diagram

Published:2011/5/4 1:40:00 Author:Rebekka | Keyword: Measuring small current amplifier

Measuring small current amplifier circuit diagram.   (View)

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Photocoupler AC switches circuit diagram

Published:2011/5/4 2:01:00 Author:Rebekka | Keyword: Photocoupler AC switches

Photocoupler AC switches circuit diagram.   (View)

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Dynamic fit light control AC switches circuit diagram

Published:2011/5/4 1:59:00 Author:Rebekka | Keyword: Dynamic fit light control, AC switches

Dynamic fit light control AC switches circuit diagram.   (View)

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Both-way thyristor motor control circuit diagram 1

Published:2011/5/4 1:42:00 Author:Rebekka | Keyword: Both-way thyristor motor control

Both-way thyristor motor control circuit diagram.   (View)

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Both-way thyristor motor control circuit diagram 2

Published:2011/5/4 1:48:00 Author:Rebekka | Keyword: Both-way thyristor motor control

Both-way thyristor motor control circuit diagram.   (View)

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TDA4605 thick film switching power supply IC diagram

Published:2011/5/4 2:11:00 Author:Ecco | Keyword: thick film, switching power supply, IC

TDA4605 thick film switching power supply IC diagram is produced by Philips, which is widely used in domestic and imported large screen color TV and color display. TDA4605 integrated circuit includes voltage regulator sampling processing circuit, under voltage protection detection circuit, the excitation pulse output circuit, soft start control circuit, its internal circuit diagram shown in Figure 1 million. The 8-pin IC-style packaging million, the pin functions and data listed in Table 1. Figure 1 TDA4605 integrated circuit within the circuit block diagram Table 1 showsTDA4605 integrated circuit pin functions and data   (View)

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Tape recorder remote control display circuit

Published:2011/4/29 4:52:00 Author:Nicole | Keyword: tape recorder, remote control

CC4082 is connected into positive feedback, it is coordinated with all kinds function switches, they form a trigger to ensure the output electrical signal against chattering. The later or gate or trigger simulates the work logic of tape recorder, the six LEDs indicate the six states of recording, putting, rewinding, fast marching, stopping, time-out. CC4013 drives LED directly, the limited current is 4~5mA. To choose Q terminal to drive LED, because the Q terminal is unrelated to logic state. If the output voltage drops, it has no influence on Q terminal logic state.   (View)

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Improved photoelectric isolator linear circuit

Published:2011/4/29 4:50:00 Author:Nicole | Keyword: photoelectric isolator

Using negative feedback technology can improve the transport linearity of photoelectric isolator device. In figure (a), when D1 is in the feedback path, its current is linear with V1. The shortage of this circuit is not considering the nonlinear relationship between photoelectric isolator device current current transfer ratio and working current. So we should choose and adjust devicecarefully. In figure (b), increasing secondary feedback can improve the linearity. The circuit gain is 1, the frequency is 0~30kHz, the dynamic range is -8~+8V, the nonlinear distortion(it is ±8V)is lower than 0.5%, the noise is lower than 1mV, the common-mode voltage is higher than 250V.   (View)

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Industrial and mining field indicator light circuit

Published:2011/5/2 7:51:00 Author:Nicole | Keyword: industrial and mining field, indicator light

The indicator lights are fixed in the field that can help driver tojudge the situation behind car, to prevent accidents. Using phototransistor as singal sensor, when the light fell on photosensitive tube, relay J0 pulls in, a pair of often opening contacts are closed, then the green light is on, it means that there is no obstruction behind car. If there is obstruction to keep out light, then relay J0 dose not pull in, the red lights on.   (View)

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