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Communication Circuit

Index 6



The communication conversion circuit diagram between RS232 and RS485

Published:2011/9/18 21:32:00 Author:Ecco | Keyword: communication conversion


1. The circuit diagram is the combination of the communication conversion circuit between the RS48 and RS232, RS232 and TTL level (UART) serial converter circuit. 2. This circuit is basically proven, and some RS232-TTL's speed is up to 57.6KB / s. ADM483 requires +5V power supply, as the 78L05's efficiencyis not high. The serial get-power capacity is limited, and the output power has not reach 5V. It suggests that 485 chip uses 3.3V power supply.   (View)

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The digital paging systems F36-F and F36-J

Published:2011/9/4 20:33:00 Author:TaoXi | Keyword: Digital paging system


The transmission circuit: The receiving circuit:   (View)

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A Stable Timer Circuit Diagram of Four-Transistor

Published:2011/9/3 19:56:00 Author:Zoey | Keyword: Stable Timer Circuit , Four-Transistor


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Circuit diagram of power line carrier communication IC-LM1893 and its application

Published:2011/9/7 4:18:00 Author:Vicky | Keyword: power line carrier communication

Circuit diagram of power line carrier communication IC-LM1893 and its application
Circuit diagram of power line carrier communication IC-LM1893 and its application

LM1893 is a power line carrier communication integrated circuit developed by National Semiconductor. It contains the whole functions of sending and receiving data. It can realize half duplex communication of serial data. It only needs few exterior components to constitute and whole power line carrier communication system, which is applicable in industrial automatic control system, building data or voice communication, house-application central control, emergency call box system in hospital, fire proofing annunciator and computer data transmitting and so on. Its main features are as follows: FSK anti-noise modulation technology Pulse generator with alternative noise filtering Data transmitting rate :up to 4.8KB Sine wave carrier frequency to reduce radio frequency disturbance Radio frequency rate which can be 10 times stronger Alternative carrier frequency between 50 and 200kHz Compatible TTL and MOS logic level Adjustable voltage, power and level Ability to drive all sorts of level LM1893 working principle   (View)

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TDA2822 Wireless headset circuit diagram

Published:2011/8/18 1:18:00 Author:Jessie | Keyword: Wireless headset

TDA2822 Wireless headset circuit diagram
TDA2822-B Wireless headset is the voice tool for students to listen to electronic teaching pronunciation, the failure rate is higher. Because the relevant materialthat manufacturer offer is not neat,writter draw a diagram according to the real. TDA2822M is a double channel audio amplifier integrated circuit. Magnetic coil S receives the audio signal,and sends to integrated blockpin6 fromvolume potentiometer W center tap ,after internal amplification it is output by pin 3,then it isadded to two parallel headphonesby coupling capacitors C2 to makevoice.   (View)

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RS232 serial port communication circuit

Published:2011/8/13 1:02:00 Author:qqtang | Keyword: serial port, communication circuit

RS232 serial port communication circuit
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Voltage regulator DC-DC circuit and power supply monitor pins introduction and main features TA78L00F constant voltage regulator

Published:2011/8/17 19:40:00 Author: | Keyword: Voltage regulator, power supply monitor, main features

Voltage regulator DC-DC circuit and power supply monitor pins introduction and main features  TA78L00F constant voltage regulator
TA78L00F constant voltage regulator It can output fixed voltage, such as 5 V, 6 V , 8 V ,9 V, 10 V, 12 V, 15 V ,18 V, 20 V and 24 V. And its maximum output current is 150 mA. TA78L05F to TA78L15F have a maximum output voltage of 35 V, while TA78L18F to TA78L24F have a maximum input voltage of 40 V and the power consumption is 500mW. Its operating temperature is -30oC to +75oC. And it has over current and over heat protection circuit.   (View)

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The transceiver module of the remote control toy car circuit composed of RCMlA/RCMlB

Published:2011/8/1 22:09:00 Author:TaoXi | Keyword: Transceiver module, remote control toy car


Transceiver module of the remote control toy car circuit composed of RCMlA/RCMlB   (View)

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The transceiver module composed of the item prevent-lost alarm RCMlA/RCMlB

Published:2011/8/1 22:09:00 Author:TaoXi | Keyword: Transceiver module, item prevent-lost alarm


The transmitter is composed of the RCM1A and the battery, the receiver is composed of the RCM1B receiving module with the double time-delay function, the high voltage generator and the alarm sound circuit.etc.   (View)

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The heterodyne remote control receiving circuit TDA5200

Published:2011/8/1 22:08:00 Author:TaoXi | Keyword: Heterodyne, remote control, receiving circuit


The key components that will be used in this article: HCS515 TDA5200 The TDA5200 is designed as one kind of low power consumption monolithic ASK superheterodyne receiving circuit, The working frequency range is divided into two blocks: 868~870MHz and 433~435MHz. This circuit has the features of high integration, less peripheral components and perfect function, so it is the monolithic receiving circuit that has excellent performance.   (View)

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The four-channel remote receiver CS902

Published:2011/8/1 22:07:00 Author:TaoXi | Keyword: Four-channel, remote receiver


The key (View)

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BMW5 Series AGS 560Z 88pin (E34) Transmission Circuit (the 2nd)

Published:2011/8/6 8:49:00 Author:Felicity | Keyword: BMW5 Series, 88pin (E34), Transmission Circuit, (the 2bd)

BMW5 Series AGS 560Z 88pin (E34) Transmission Circuit (the 2nd)
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BMW5 Series AGS 560Z 88pin (E34) Transmission Circuit (the 1st)

Published:2011/8/6 8:50:00 Author:Felicity | Keyword: BMW5 Series, 88pin (E34), Transmission Circuit, (the 1st)

BMW5 Series AGS 560Z 88pin (E34) Transmission Circuit (the 1st)
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BMW5 Series A5S-310Z (E34) 88pin Transmission Circuit (the 2nd)

Published:2011/8/6 8:51:00 Author:Felicity | Keyword: BMW5 Series, 88pin, Transmission Circuit, (the 2nd)

BMW5 Series A5S-310Z (E34) 88pin Transmission Circuit (the 2nd)
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BMW5 Series A5S-310Z (E34) 88pin Transmission Circuit (the 1st)

Published:2011/8/6 8:50:00 Author:Felicity | Keyword: BMW5 Series, 88pin, Transmission Circuit, (the 1st)

BMW5 Series A5S-310Z (E34) 88pin Transmission Circuit (the 1st)
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BMW5 Series EGS A4S-310R (E34) 55pin Transmission Circuit (the 2nd)

Published:2011/8/6 8:52:00 Author:Felicity | Keyword: BMW5 Series, 55pin, Transmission Circuit, (the 2nd)

BMW5 Series EGS A4S-310R (E34) 55pin Transmission Circuit (the 2nd)
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BMW5 Series EGS A4S-310R (E34) 55pin Transmission Circuit (the 1st)

Published:2011/8/6 8:52:00 Author:Felicity | Keyword: BMW5 Series, 55pin, Transmission Circuit

BMW5 Series EGS A4S-310R (E34) 55pin Transmission Circuit (the 1st)
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BMW3 Series A5S-310Z 88pin Transmission Circuit (the 2nd)

Published:2011/8/6 8:52:00 Author:Felicity | Keyword: BMW3 Series, 88pin, Transmission Circuit, (the 2nd)

BMW3 Series A5S-310Z 88pin Transmission Circuit (the 2nd)
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BMW3 Series A5S-310Z 88pin Transmission Circuit (the 1st)

Published:2011/8/6 8:52:00 Author:Felicity | Keyword: BMW3 Series, 88pin, Transmission Circuit, (the 1st)

BMW3 Series A5S-310Z 88pin Transmission Circuit (the 1st)
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BMW3 Series A4S-310R 55pin Transmission Circuit

Published:2011/8/6 8:52:00 Author:Felicity | Keyword: BMW3 Series, 55pin, Transmission Circuit

BMW3 Series A4S-310R 55pin Transmission Circuit
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