Circuit Diagram

Computer RS-23Z serial interface current loop circuit

Published:2011/4/10 21:14:00 Author:Nicole | Keyword: computer, serial interface, current loop

This circuit is used in computer RS-232 serial interface and current loop circuit interface, it can transform voltage singal into 20mA current singal, the maximum transmission rate is 1200 bits. CCD IC1, T1 form receiver interface circuit, T2, T3 constitute transmitter interface circuit. When adds +12V, T2, T3 are conduction, the current outflows from T2 collector, and pass along the line then reach the ① of IC1, though LED of IC1, and pass along the line again then return to transmitter, the loop current is about 20mA. When adds -12V, T2, T3 cut off, there is no current in circuit. When current flows IC1 transmitter, the receiver is conduction, T1 is conduction, T1 collector sends out +12V electrical signal, when T1 cuts off, -12V electrical signal is sent to RS-232 through R4. Then to achieve use current loop to transmit digital signal.   (View)

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Patient pager circuit

Published:2011/4/17 22:24:00 Author:Ecco | Keyword: Patient, pager ,

Patient pager circuit 1 Patient pager circuit 2 Patient pager circuit 3   (View)

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Electro-optical amplifier circuit of computer photoelectric input machine

Published:2011/4/7 0:33:00 Author:Nicole | Keyword: electro-optical amplifier, computer, photoelectric input machine

When there is no illumination, germanium photosensitive diode is high resistance, saturate BG1, cut BG2 off, and the output is -6V. When there is illumination, germanium photosensitive diode is low resistance, then cut BG1 off, turns BG2 on, cut BG5 off, the output is almost 0V. In figure, BG3, B4 play a role in reverse voltage protection. Potentiometer W is to adjust the width of output waveform, it can normal work between 600~700μs generally.   (View)

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Massor circuit using transformer to boost pressure

Published:2011/4/17 21:15:00 Author:May | Keyword: Massor, transformer, boost pressure

  (View)

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614-B23kVA AC regulater

Published:2011/3/21 0:44:00 Author:muriel | Keyword: 614-B23kVA, AC regulater

  (View)

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2～10V precision stabilized voltage supply circuit

Published:2011/4/5 22:12:00 Author:may | Keyword: 2～10V, precision, stabilized voltage supply

  (View)

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Delay light circuit wiht power switch integrated circuit(1)

Published:2011/4/15 22:47:00 Author:Nicole | Keyword: Delay light, power switch

The delay time with power switch integrated circuit is as shown, it is composed of capacitance charge-discharge loop, TWH8751 power switch integrated circuit, power supply and so on.   (View)

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Delay light circuit with battery

Published:2011/4/15 22:30:00 Author:Nicole | Keyword: delay light, battery

  (View)

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Ni-Cd battery charging circuit

Published:2011/4/14 22:11:00 Author:Nicole | Keyword: Ni-Cd battery

In the circuit, R1 is 10Ω, R2 is 200Ω. When the switch is up closed, the charging current is 60mA(constant current); when the switch is down closed, the charging current is 3mA(constant current). The total pressure drop of silicon diodes CR1, CR2 is 1.2V, and the Q1 emitter pressure drop is 0.6V, so the net pressure drop on R1 or R2 is 0.6V. 0.6V divided by the required charging current (using ampere), then it is the resistance of R1 or R2. LED indicates the work state of this charging circuit.   (View)

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Solar battery charger circuit

Published:2011/4/15 3:11:00 Author:Nicole | Keyword: solar, battery charger

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MS51C61 falling, smooth flowing color lamp with firecrackers control circuit

Published:2011/4/15 22:28:00 Author:Nicole | Keyword: color lamp, firecrackers

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SK-12P program control varied flashing color lamp with disco music contorl circuit

Published:2011/4/15 22:24:00 Author:Nicole | Keyword: program control, flashing color lamp, disco music

SK-12P is CMOS progaram control flashing special integrated circuit, it has seven-way output, it can drive seven-way SCR directly. Seven-way color lamp is cyclic changing with six kinds program control patterns chronological order, it is colorful. As shown, this is a program control varied flashing color lamp with disco music contorl circuit composed of SK-12P.   (View)

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Small night light with capacity ballasting(1W)

Published:2011/4/15 22:32:00 Author:Nicole | Keyword: small night light, capacity ballasting

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SHANGHAI GM BUICK(LaCROSSE) saloon car infotainment System circuit diagram(six)

Published:2011/4/17 21:19:00 Author:muriel | Keyword: SHANGHAI GM BUICK(LaCROSSE), saloon car , infotainment System

SHANGHAI GM BUICK(LaCROSSE) saloon car infotainment System circuit diagram is as shown   (View)

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Shanghai gm Chevrolet（Epica）saloon car 2.0L engine circuit diagram(four)

Published:2011/4/17 20:50:00 Author:muriel | Keyword: Shanghai gm Chevrolet(Epica), saloon car , 2.0L engine

Shanghai gm Chevrolet（Epica）saloon car 2.0L engine circuit diagram(four) is as shown   (View)

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SHANGHAI GM BUICK(LaCROSSE) saloon car infotainment System circuit diagram(seven)

Published:2011/4/17 21:21:00 Author:muriel | Keyword: SHANGHAI GM BUICK(LaCROSSE), saloon car , infotainment System

SHANGHAI GM BUICK(LaCROSSE) saloon car infotainment System circuit diagram isas shown   (View)

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SHANGHAI GM BUICK(LaCROSSE) saloon car infotainment System circuit diagram(eight)

Published:2011/4/17 21:17:00 Author:muriel | Keyword: SHANGHAI GM BUICK(LaCROSSE), saloon car , infotainment System

SHANGHAI GM BUICK(LaCROSSE) saloon car infotainment System circuit diagram is as shown   (View)

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Shanghai gm Chevrolet（Epica）saloon car 2.0L engine circuit diagram(five)

Published:2011/4/17 20:50:00 Author:muriel | Keyword: Shanghai gm Chevrolet（Epica）, saloon car , 2.0L engine

Shanghai gm Chevrolet（Epica）saloon car 2.0L engine circuit diagram(five) is as shown   (View)

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SHANGHAI GM BUICK(LaCROSSE) saloon car supplementary restraint system circuit diagram(one)

Published:2011/4/17 21:06:00 Author:muriel | Keyword: SHANGHAI GM BUICK(LaCROSSE), saloon car, supplementary restraint system

SHANGHAI GM BUICK(LaCROSSE) saloon car supplementary restraint system circuit diagram(one) is as shown   (View)

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Shanghai gm Chevrolet（Epica）saloon car 2.0L engine circuit diagram(six)

Published:2011/4/17 20:48:00 Author:muriel | Keyword: Shanghai gm Chevrolet（Epica）, saloon car, 2.0L engine

Shanghai gm Chevrolet（Epica）saloon car 2.0L engine circuit diagram(six) is as shown   (View)

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