Communication Circuit

Digital code control switch digital woven decoder MC145026/MC145027 and the mini radio transceiver module M303S/M303R

Published:2011/5/19 1:21:00 Author:TaoXi | Keyword: Digital code, control switch, digital woven decoder, mini radio transceiver

The digital code control switch digital woven decoder MC145026/MC145027 and the mini radio transceiver module M303S/M303R is as shown. When you press the transmitter button SA, the circuit gets the electricity to start working, the serial coding signal is output from the pin-15 of MC145026 and then it is sent out by the M303S launch module. Receiving module M303R of the receiving circuit receives the serial coding signal, then modulates the encoded signal and sends it to the MC145027 decoder, when the decoder's address and coding are the same, MC145027's decoding effective instruction end outputs the high-level pulse signal, the transistor VT conductsand drives the relay to close, also it completes the switch control function.   (View)

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The ABS fault detecting circuit of Santana 20OOGSi

Published:2011/5/13 22:10:00 Author:Borg | Keyword: ABS, fault detecting, Santana

ABS computer J104 can not only control wheel brakeing automatically, but also detect its own faults. When it detect something wrong ABS, it will save it as the form of codes and light the ABS alarm lamp to remind the driver to remove it in time. In addition, there are some faults without any codes, which should be handled in regular methods. ABS fault detection can be completed with VAG1552 diagnostic apparatus,Fault codes and the removing methods are in Figure 1, and parameter detection in Figure 7, valve detection in Figure 8.   (View)

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The starting and power supply circuit of Santana(chassis No. 3ZMP003182)

Published:2011/5/14 23:32:00 Author:Borg | Keyword: power supply, Santana

1-battery; 2-starter; 3-starting interlocking switch; 4-gear position indicator(with auto transmission); 5-fuel tank electrical pump; 5a-cold starting temperature control switch; 6-integrate alternator; 7-radio filter capacitor; 8-charging indicator; 9-power supply system relay; 10-oil assistance pump; 11-oil pump; 12-igniting switch; 13-jet resistance; 14-Ⅰjar jet; 15-jet resistance; 16-IV jar jet; 17-jet resistance; 18-Ⅱjar jet; 19-jet resistance; 20-Ⅲ jar jet   (View)

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The wires off/on detection circuit of Santana 2000GLi

Published:2011/5/16 19:50:00 Author:Borg | Keyword: detection circuit, Santana

When we engage in the detection job, we should connect the box V .A Gl598 and cables V .A .G1598-9 to the connector of the wire bundles, but let the computer of line. (1)shut down the igniting switches and pull off the connector of the engine control computer, then connect the box V .A Gl598 and cables V .A .G1598-9 to the control wires of the engine computer, by which we detect whether the circuit is off or short (computer is not connected).(2)Shut down the igniting switch and connect the box V .A Gl598 and cables V .A .G1598-9 to the engine control computer, by which we detect the voltage between the sensor and each terminal of the computer.   (View)

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The digit display patient alarm device circuit

Published:2011/6/7 21:09:00 Author:qqtang | Keyword: digit display, patient alarm device

The circuit is shown in the figure, which can fulfill the dual-way signal delivering between sickrooms and duty rooms. The key switches K0～K9 and LED D0~D9 are installed in the sickroom, and the digital pipe and buzzer are fixed in the duty room. The buzzer will be still if there is no call from the sickroom, and the digital pipe is OFF. When patients press the switch K2, the buzzer in the duty room is buzzing and the pipe is indicating 2 ; at the same time, the LED in the sickroom is glowing, which shows that the patient signal has been delivered to the duty room.   (View)

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MC3357 small power FM intermediate frequency integrated circuit typical application circuit

Published:2011/5/25 20:28:00 Author:Christina | Keyword: small power, FM, intermediate frequency, integrated circuit, typical application

The MC3357 is designed as one kind of small power FM intermediate frequency integrated circuit that is produced by the MOTOROLA company, and it can be used in the FM duplex communication equipment's FM intermediate frequency circuit, the frequency mixer circuit, the noise suppression and lagging circuit, the active filter amplification circuit, the amplitude limit amplification circuit, the modem circuit and other subsidiary function circuits. The internal circuit block diagram and the typical application circuit which is composed of the MC3357 IC are as shown in the figure.   (View)

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FET FM wireless microphone circuit

Published:2011/5/26 6:52:00 Author:Christina | Keyword: FET, FM, wireless microphone

The FET FM wireless microphone circuit is as shown in this figure. This circuit uses the 2SCl000 which has the high amplification coefficient as the microphone amplification stage. The MOSFET 2SKl92A has the functions of oscillation and modulation output. The oscillation frequency is decided by the coil Ll and the parallel capacitor 6pF, by adjusting the microchip of the LI, the oscillation frequency can be changed in the range of 76MHz to 90MHz. At last, you use a ethylene line as the antenna and directly output from the FET's source electrode. In order to prevent the interference between different stages, we use the l00Ω, 47μF capacitance to form the decoupling circuit. When the circuit is working, the light-emitting diode VD turns on. The output port of the circuit do not need the buffer stage to work.   (View)

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Wireless hands-free telephone device circuit

Published:2011/5/30 1:45:00 Author:Christina | Keyword: Wireless, hands-free, telephone, device

The Wireless hands-free telephone device circuit is as shown:   (View)

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Single channel wireless remote control transceiver circuit

Published:2011/5/30 1:47:00 Author:Christina | Keyword: Single channel, wireless, remote control, transceiver

The Single channel wireless remote control transceiver circuit is as shown:   (View)

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Wireless hands-free telephone system circuit

Published:2011/5/20 5:38:00 Author:chopper | Keyword: Wireless, hands-free telephone

  (View)

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UHF transmitter module CS901 composed of the SAW

Published:2011/5/13 0:44:00 Author:TaoXi | Keyword: UHF, transmitter module, SAW

UHF transmitter module CS901 is composed of the SAW   (View)

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Security wireless transmitter circuit of the adytum and the bank

Published:2011/5/13 0:43:00 Author:TaoXi | Keyword: Security wireless transmitter, adytum, bank

Security wireless transmitter circuit of the adytum and the bank   (View)

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radio transmitting typical application circuit composed of the MC2833

Published:2011/5/13 0:43:00 Author:TaoXi | Keyword: radio transmitting, typical application

radio transmitting typical application circuit is composed of the MC2833   (View)

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radio transmitting typical application circuit composed of the MC2831

Published:2011/5/13 0:43:00 Author:TaoXi | Keyword: radio transmitting, typical application

radio transmitting typical application circuit is composed of the MC2831   (View)

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Sickroom wireless call emitting and receiving display circuit M303S/M303R

Published:2011/5/19 8:28:00 Author:TaoXi | Keyword: Sickroom, wireless call, emitting, receiving, display circuit

Data of the related components that will be used in this article: VD5206 VD5027 M303S CD4069 CD4514 7806 LM386 HFC9301 This circuit uses the wireless transmission mode, and it uses the stable performance radio transceiver module M303S/M303R and the digital coding decoder VD5026/VD5027, it displays the bed number or the room number of the call beds, it is easy to install. The RF transmission power of this circuit is small, so it will not influence the normal working of the medical equipments. The ward wireless call system is composed of the radio call launcher and the radio receiving display which is installed in the duty room. The radio call launcher's circuit principle is as shown:   (View)

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PHILIPS 28GR6776 color TV power supply circuit

Published:2011/5/20 2:31:00 Author:Christina | Keyword: PHILIPS, color TV, power supply

The PHILIPS 28GR6776 color TV power supply circuit is as shown:   (View)

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Liquid drip automatic heating alarm circuit

Published:2011/5/13 0:52:00 Author:TaoXi | Keyword: Liquid drip, automatic heating, alarm circuit

Liquid drip automatic heating alarm circuit   (View)

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The control system self-detection circuit of 2000GLi engine

Published:2011/5/16 11:08:00 Author:Borg | Keyword: control system, Santana

V.A.G1551 fault diagnosis equipment can not only do test on the electric spray engines of Red Flag, Jetta, Golf and Passat, but also can do the job to the engines of Santana. The car should have these conditions if we want use the equipment: the would be detected engines must have been run for a needed time, the coolant temperature need to be more than 7℃, batteries are normal, fuses are good and the ground connection of the engine is OK. 1-steer; 2-VACI551 fault diagnosis equipment; 3-the power supply plug of the equipment; 4-the outlet of the equipment.   (View)

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Transceiver module which is composed of the remote control voice doorbell RCMlA/RCMlB

Published:2011/5/11 3:03:00 Author:TaoXi | Keyword: Transceiver module, remote control, voice doorbell

The remote control doorbell saves the wiring between the button and the doorbell, the installation position of the doorbell is very flexible and it is convenient. The voice integrated circuit can use the KD15 series of soft packaging integrated circuit. After the circuit is installed, you can use it immediately. when you are using it, you should make the receiver away from the big metal objects to avoid the influencing of the remote sensitivity.   (View)

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Digital paging systems F36-F and F36-J

Published:2011/5/11 19:20:00 Author:TaoXi | Keyword: Digital paging system

The transmission circuit: The receiving circuit:   (View)

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