Circuit Diagram

LED Festival Illumination Controller (5)

Published:2011/7/10 7:43:00 Author:Sue | Keyword: LED, Illumination, Controller

The 220v ac voltage will provide LED drive circuit with working voltage after it is rectificated by VD1-VD4. The other circuit will provide IC with +6v working voltage after it is limited and reduced by R1, stablized by VS, filtrated by C1. After the oscillator begins to work, it will output low frequency oscillate signals. The signals will be put on V1-V4's base electrode through RP2-RP5 after it is reversal processed by D1-D4. Then V1-V4 are connected intermittently. VL1-VL50, VL51-VL100, VL101-VL150,VL151-VL200 will be illuminated intermittently. By adjusting RP1's resistance value,the oscillator'sworking frequency will be changed. Then LED's illumination effects can be changed.   (View)

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μPC2400HF series of regulator, main features and pin of DC-DC circuit and power monitor

Published:2011/7/9 8:26:00 Author:Lucas | Keyword: regulator , main features , pin , DC-DC circuit , power monitor

μPC2400HF series of three-terminal regulator ( positive output) It is the four-terminal low dropout series of regulator with fixed output voltage; output voltage is 5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V; output current is 1A; output voltage error is ± 2%; when output current is 1A, the minimum typical value of difference between input and output voltage is 0.5V; maximum input voltage is 36V; Operating Temperature is -20 ~ +85 ℃; it contains overheat protection, protection circuit in safe operating area.   (View)

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μPC2260H series of regulator, main features and pin of DC-DC circuit and power supply monitor

Published:2011/7/9 7:35:00 Author:Lucas | Keyword: regulator, main features , pin , DC-DC circuit , power supply monitor

μPC2260H series of regulator ( with reset end) It is the five-terminal low dropout series of regulator with fixed output voltage and output voltage in 5V; the maximum output current is 500mA; typical value of no-load circuit current is 1.2mA; output current is 500mA, the typical value of maximum input voltage is 0.5V; when output voltage drops, it outputs low signal; external capacitor can set reset time constant; typical value of standby leakage current is 1nA; maximum input voltage is 35V; the power consumption is 20W; operating Temperature is -20 ~ +85 ℃.   (View)

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μPC2250H series regulator，main features and pin of DC-DC circuit and power supply monitor

Published:2011/7/9 7:20:00 Author:Lucas | Keyword: regulator, main features , pin, DC-DC circuit , power supply monitor

μPC2250H series regulator(with reset end) It is the four-terminal low dropout series of regulator with fixed output voltage; the output voltage is 3V and 5V; output current is 100mA; typical value of no-load circuit current is 1.3mA; when output voltage drops, it outputs reset signal; maximum input voltage is 12V; power consumption is 1.2W; operating Temperature is -20 ~ +85 ℃; typically value of standby leakage current is 1μA.   (View)

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μPC16300 series of regulator, main features and pin of DC-DC circuit and power supply monitor

Published:2011/7/9 23:30:00 Author:Lucas | Keyword: regulator, main features , pin, DC-DC circuit, power supply monitor

μPC16300 series of three-terminal regulator( with negative output) It is the three-terminal regulator with fixed output voltage; output voltage can be -5V,,-8V,-12V,-15V,-18V,-24V; output current is 0.005 ~ 1A; maximum input voltage of μPC16324 is -40V, and the rest is -35V; Operating Temperature is -20 ~ +85 ℃; it includes overcurrent, overtemperature protection, safe operating area protection circuit; it can be interchangeable with the 7900 series.   (View)

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Stepper Motor ULN2003 Internal Diagram And Equivalent Circuit

Published:2011/7/8 23:31:00 Author:Robert | Keyword: Stepper Motor, Internal, Diagram, Equivalent

In practice general driving channels is more than one. But using the discrete circuit shown in the picture will get large volume. So in many cases it always uses ready-made ICs for multi-channel driving. Commonly used small type stepper motor driving circuit can be ULN2003 or ULN2803. This book's auxiliary experiment board uses the ULN2003. ULN2003 is one of the high-voltage large-current darlinton transistor array series products. It features high current gain, high working voltage, wide temperature range, high loading capacity and so on. So it is adequate to many kinds of high-speed large-power driving systems. The ULN2003A is made up of 7 groups darlinton transistor arrays and corresponding resistances network and clamping diodes network. It has the load capacity of driving 7 groups at the same time. It is a single-chip bipolar large-power high-speed IC. The ULN2003 internal structure and its equivalent circuit is shown in the picture.   (View)

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SWF81 And SWF82 Type Temperature Sensor Shape Structure Circuit

Published:2011/7/9 4:25:00 Author:Robert | Keyword: Temperature Sensor, Shape, Structure

The picture shows the SWF81 and SWF82 type temperature sensor shape structure circuit.   (View)

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MC68HC7O5T-16 Single-Chip Micro-Computer Integrated Circuit

Published:2011/7/9 4:35:00 Author:Robert | Keyword: Single-Chip, Micro-Computer, Integrated

The MC68HC7O5T16 is a single-chip micro-computer IC produced by the Motorola company which is widely used in Chuangwei series large-screen color TV sets. 1.Its functional features. The MC68HC7O5T16 IC's internal part is mainly made up of central processing unit (CPU), clock oscillation circuit, reset control circuit, control circuit, remote-control command signal processing circuit, key scanning decoding circuit and other some control and auxiliary function circuits and so on. 2.Its pin's function and data. The MC68HC7O5T16 IC uses 56-pin dual package. Its internal circuit diagram and pin's function and signal flowing is shown in the picture and its pin's letter code and data is listed in the table. The picture shows the MC68HC7O5T-16 IC's internal circuit diagram and pin's function and signal flowing. The table shows the MC68HC7O5T-16 IC's pin's letter code and data.   (View)

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MA6540 switching power supply circuit

Published:2011/7/9 3:47:00 Author:chopper | Keyword: switching, power supply circuit

Figure shows the MA6540 switching power supply circuit,the output voltage is 24V,output current is 6A.MA6540 is the IC of excited power MOSFET with part resonance function.   (View)

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MQ51 Improved Type Hydrogen Sensor Electrode Lead Circuit

Published:2011/7/9 20:00:00 Author:Robert | Keyword: Improved, Hydrogen Sensor, Electrode, Lead

The MQ51 improved type hydrogen sensor is a new semiconductor field-effect sensor element which is can be used in the equipments for hydrogen leak hunting, detection, monitoring and so on. It features good selectivity, high sensitivity, fast response and stable and reliable and other advantages. The MQ51 improved type hydrogen sensor electrode lead circuit is shown in the picture. The picture shows the MQ51 improved type hydrogen sensor electrode lead circuit. Picture (a) shows the lead circuit. Picture (b) shows the MQ51 improved I type circuit. Picture (c) shows the MQ51 improved II type circuit.   (View)

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power supply circuit with 5V/15A design output

Published:2011/7/9 4:28:00 Author:chopper | Keyword: power supply circuit, 5V/15A, design output

The power supply circuit whose design output is 5V/15A is as shown in picture.In the circuit, C105 is the resonant capacitor, and adopts ceramic capacitor. The chip capacitor can be used when it requires to improve the temperature characteristics.However,the current is comparative large,we should confirm the rated current of the capacitor. M101 is the delay element. C107 and R107 determine TON,and we can reduce the resistance R107 if it needs to improve the frequency.   (View)

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ZVS half-bridge output circuit

Published:2011/7/9 3:27:00 Author:chopper | Keyword: ZVS, half-bridge, output circuit

ZVS half-bridge output circuit is shown as picture   (View)

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μPC14300 series of regulator, main features and pin of DC-DC circuit and power supply monitor

Published:2011/7/9 23:37:00 Author:Lucas | Keyword: regulator, main features , pin , DC-DC circuit , power supply monitor

μPC14300series of three-terminal regulator It is the three-terminal regulator with fixed output voltage; output voltage can be 5V, 8V,12V,15V, 24V; output current is 0.005 ~ 1A; maximum input voltage of μPC14305 is 40V, and the rest is 35V; Operating Temperature is -40 ~ +85 ℃; it includes overcurrent, overtemperature protection, safe operating area protection circuit; it can be interchangeable with the 7800 series.   (View)

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low noise, efficient switching power supply circuit

Published:2011/7/9 3:40:00 Author:chopper | Keyword: low noise, efficient, switching, power supply circuit

The low noise, efficient switching power supply examples composed of soft switching circuit and synchronous rectification circuit is shown as picture.Power supply output is 16.5V/3A,conversion efficiency is 88%. Although this power is designed for 16.5V voltage laptops,you can make the output voltage between 3.3 ~ 20V through changing the secondary winding turns of transformer and other component parameters like R, C.If VT1 selects 100V voltage device, the output voltage can reach 30V. The efficiency will be 82% when output is 5V,and efficiency will be 90% when output is 30V.   (View)

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M881461-12RS Dynamic Random Memory Integrated Circuit

Published:2011/7/9 4:50:00 Author:Robert | Keyword: Dynamic, Random, Memory, Integrated

The M881461-12RS is a dynamic random memory IC produced by the Mitsubishi company. It is widely used in the cases which need random storing imformation, such as picture-in-picture large-screen color TV sets (Changhong NC-3 cassette mechanism) and so on. The M881461-12RS uses 24-pin package. Its pin's function and data is listed in the table and the Changhong NC-3 color TV sets cassette mechanism typical application circuit composed of this IC is shown in the picture. The table shows the M881461-12RS IC's pin's function and data.   (View)

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μA723/723C series of regulator, main features and pin of DC-DC circuit and power supply monitor

Published:2011/7/9 23:57:00 Author:Lucas | Keyword: regulator, main features , pin , DC-DC circuit, power supply monitor

μA723/723C adjustable regulator( positive output) It's the regulator with adjustable output voltage; output voltage range is 2 ~ 37V, output current is 150mA; when current output is between 0 ~ 50mA, the load stability is 0.08%; the maximum input voltage is 40V; maximum input voltage difference is 40V; it can be turned off in long distance; μA723 operating temperature is -55 ~ +125 ℃, μA723C is 0 ~ 70 ℃; it includes over-current limiting circuit. Similar models: LM723, 723, RC723, CA723, SG723, MB723, HA17723, NJM723.   (View)

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M658395P Digital Time-Delay Reverb Integrated Circuit

Published:2011/7/9 5:04:00 Author:Robert | Keyword: Digital, Time-Delay, Reverb, Integrated

The M658395P is a digital time-delay reverb IC produced by the Mitsubishi company. It is widely used as the Kara OK signal processing unit in home audio, TV audio, car audio etc. 1.Its functional features. The M658395P IC has internal A/D and D/A convertion circuit, low-pass filter (LDF) circuit, 16K memory (RAM), automatic voltage level control circuit (ALC), microphone amplification circuit, oscillation circuit and other some auxiliary function circuits. Its internal circuit diagram is shown in the picture. 2.Its pin's function and data. The M658395P IC uses 36-pin dual package and its pin's function and data is listed in the table. The picture shows the M658395P IC's internal circuit diagram. The table shows the M658395P IC's pin's function and data.   (View)

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W4962 switch regulator, main features and pin of DC-DC circuit and power supply monitor

Published:2011/7/10 1:54:00 Author:Lucas | Keyword: switch regulator, main features , pin , DC-DC circuit , power supply monitor

W4962 1.5A switch regulator It is the 1.5A tandem switching regulator; output voltage range is 5 ~ 40V; output Current is 1.5A; output power is 60W; reference voltage is ± 4%; duty cycle range is 0 to 100%; power efficiency is 90%; maximum input voltage is 50V ; maximum difference between input and output voltage is 50V; maximum DC output is -1V; power is 4.3W; it has the functions of soft start, current limit, thermal protection.   (View)

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M54573L Frequency Band Conversion Switch Integrated Circuit

Published:2011/7/9 5:13:00 Author:Robert | Keyword: Frequency Band, Conversion, Switch, Integrated

The M54573L is a frequency band conversion switch IC produced by the Japanese Mitsubishi company. It is widely used in many kinds of screen in domestic and imported color TV sets. 1.Its functional features. The M54573L IC's internal circuit is mainly made up of frequency-band conversion control signal decoding circuit, decoding driving control circui and other function circuits. 2.Its pin's function and data. The M54573L IC uses 8-pin single inling package. Its pin's function is shown in the picture and its typical working voltage is listed in the table. The picture shows the M54573L IC's internal circuit diagram and pin's function. The table shows the M54573L IC's typical working voltage.   (View)

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Compensation Circuit For Unequal Electrical Potential VO

Published:2011/7/9 6:27:00 Author:Robert | Keyword: Compensation, Unequal, Electrical Potential

Generally it takes the method of adding compensation resistance to eliminate the Hall element's inherent unequal electrical potential VO. But this method would affect the Hall element's sensitivity and accuracy. The picture shows several common compensation circuit. The picture shows some compensation unequal electrical potential circuits by using cross-connected resistances.   (View)

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