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Index 1496

The mini wireless call systems BA1401/TDA7010T

Published:2011/7/18 21:47:00 Author:TaoXi | Keyword: mini, wireless call system

Transmitter (View)

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The Remote control automatic door circuit

Published:2011/7/18 21:47:00 Author:TaoXi | Keyword: Remote control, automatic door

Transmitter circuit: Receiving circuit: Three-phase positive &negative motor which is controlled by this circuit is as shown: (View)

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The Spread Spectrum Rolling code Wireless Tracking Alarm Components KB318/KB318R

Published:2011/7/18 21:46:00 Author:TaoXi | Keyword: Spread Spectrum, Rolling code, Wireless Tracking, Alarm Components

The spread spectrum rolling code wireless tracking alarm component can be used in the situations that need the long distance wireless BP machine type feedback alarm such as the cars, motorcycles and other, it uses the advanced technology and devices, so it has the perfect functions and is better than other similar products. The spread spectrum rolling code wireless tracking alarm component is composed of a wireless transmitter KB318T (or KB923T), and a key buckle type micro receiving alarm KB318R (or KB923R). The remote control transmitter principle figure is as shown: (View)

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R1212 Driving White LED Application Circuit

Published:2011/7/11 23:48:00 Author:Michel | Keyword: White LED, Application Circuit

R1212 Driving White LED Application Circuit
Ricoh R1211 uses CM0S low power consumption and current control switch type boost converter. Its periphery circuit is simple and there is just an inductor, a diode, a mosfet,some resistance and capacitance.The input voltage range is 2.5 ~ 5.5 V and it is suitable for single quarter lithium ion battery or ordinary dry battery power supply. The chip inside uses PWM,which can produce as much as 15 V output voltage and it drives three series white LED. R1211 series chip adopts the phase compensation feedback loop,which makes whole boost conversion process response more rapidly and output voltage becomes more stable. (View)

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

Published:2011/7/18 21:46:00 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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Signal Generator Circuit of BW-2

Published:2011/7/13 7:19:00 Author:Michel | Keyword: Signal Generator, Circuit

Signal Generator Circuit of BW-2
(View)

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Wireless Security Alarm Circuit of 2051 Design

Published:2011/7/11 7:57:00 Author:Michel | Keyword: Wireless Security, Alarm Circuit

Wireless Security Alarm Circuit of 2051 Design
This site to introduce net friend about the core production of wireless security alarm system. The single chip AT89C2051 is used as the central processing chip , which makes the system extension become more convenient.Corresponding soft should be changed if some settings need be altered.This is useful for single chip study. First,Hardware Design The circuit principle diagram is shown as above, and it consists of the main wireless access, data decoding, data processing, alarm circuit, output power,alarm display and power supply circuit.The machine receiving frequency is 315M and decoding data uses PT2272 special decoder chip with stable and dependable performance which is widely used in the market.Data processing is completed by the single chip and it is used to distinguish alarm signal,accept all operating instructions and complete the corresponding operation. (View)

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Sixteen-channel remote receiver circuit T998C

Published:2011/7/18 21:46:00 Author:TaoXi | Keyword: Sixteen-channel, remote receiver

The key components that will be used in this article: T998C CD4514 9014 The sixteen-channel remote receiver circuit T998C which is composed of the T998C-12V receiving module and the four-sixteen-channel CD4514 decoder. This circuit can be used as the latch output and the unlatch output, SB is the control switch. When the SB is connected with the VDD, the circuit is in the latch output state, the sixteen output terminalsare not controlled by the Io output state; When the SB is connected with the VDD's output port, the circuit is in the unlatch output state, the output terminalsare controlled by the Io output state. When you are using this sixteen-channel remote receiver circuit, you must follow the two-decimal encoding method, and finish the operation of each channel with the code list. The remote operation code list of the transmitter's each channel is as shown: (View)

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