Communication Circuit

Temperature control interface circuit with the KTYlo silicon temperature sensor

Published:2011/5/12 20:43:00 Author:TaoXi | Keyword: Temperature control, interface circuit, silicon temperature sensor

Temperature control interface circuit with the KTYlo silicon temperature sensor   (View)

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Temperature change indicator circuit with the voice instructing

Published:2011/5/12 20:43:00 Author:TaoXi | Keyword: Temperature change indicator, voice instructing

Temperature change indicator circuit with the voice instructing   (View)

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SIM Card Circuit

Published:2011/5/12 9:05:00 Author:Robert | Keyword: SIM Card

The SIM Card Circuit is shown below.   (View)

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

Published:2011/5/12 1:07:00 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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Transceiver module of the remote control toy car circuit composed of RCMlA/RCMlB

Published:2011/5/12 1:07:00 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 basic radio transmitting circuit which is composed of the sound surface wave resonator (SAW)

Published:2011/5/11 18:26:00 Author:TaoXi | Keyword: basic radio transmitting, sound surface wave resonator

The basic radio transmitting circuit which is composed of the sound surface wave resonator (SAW).   (View)

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Radio control car receiver principle circuit diagram

Published:2011/5/11 1:52:00 Author:Rebekka | Keyword: Radio control car receiver

Here is the diagram of radio controlcarreceiverprinciple circuit. Notes:The choice of transistor Q1 and the bias resistorQ1 1815 9018R1 240K 100K The choice of the high-frequency parameters partFrequency C1 C2 L227M 35P 30P 10uH35M 30P 30P 8.2uH40M 30P 20P 5.1uH49M 20P 15P 3.3uH The production method of L1In the diameter of 5mm, use Enameled wire diameter of 0.5 to intensively wound the skeleton with a core. Make appropriate changes according to the frequency.   (View)

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FM transmitter circuit diagram

Published:2011/5/11 1:35:00 Author:Rebekka | Keyword: FM transmitter

Here is the diagram of FM transmitter circuit.   (View)

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BH1417 FM transmitter circuit diagram

Published:2011/5/11 1:34:00 Author:Rebekka | Keyword: FM transmitter

Here is the diagram of BH1417 FM transmitter circuit.   (View)

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88-108MHz FM transmitter circuit diagram

Published:2011/5/11 1:27:00 Author:Rebekka | Keyword: FM transmitter

Here is the diagram of 88-108MHz FM transmitter circuit.   (View)

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FSK 315MHz transmitter circuit

Published:2011/5/9 5:07:00 Author:John | Keyword: transmitter circuit

TH72001 is a single-chip transmitter chip, designed with a standard line with EN 300220 and some similar standards. It can be used in keyless entry systems, remote telemetry systems, data communications systems and security and other systems. The main technical characteristics are as follows: • Operating frequency is 290 ~ 350 MHz; • Single-ended RF output; • FSK modulation; • FSK modulates through crystal pulling and FSK modulates at rate of DC ~ 40 Kb / s;• Power supply is l .9 ~ 5.5 V; • Operating current is 3.5 ~ 10.7mA and standby current is 0.1μA; • Output power is adjustable within -15 ~ +6 dBm.   (View)

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The PC Intergrated Circuit of C807-1354 Communication Single Door

Published:2011/5/10 20:40:00 Author:Borg | Keyword: Intergrated Circuit, Communication, Single Door

C807一1354 is an PC intergrated circuit of communication single door which is used in wirless phones as the bus master of cell phones. 1.function features C807一1354 intergrated circuits contain control circuits of wireless delivering/receiving,LCD drive, lighting lamps, key switch encoding/decoding, clock shocking, in it, phase-locked loop signal handling, buzzer drive, code generating and conditioning, low voltage test,charging and othe functions. 2.pin functions and relevent data C807—1354 intergrated circuits are packaged with 44 pinnings,whose pin functions and data are listed in Table 1. Table 1 pin functions and data of C807-1354   (View)

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Transmitter Circuit

Published:2011/5/10 1:05:00 Author:Sharon | Keyword: Transmitter

Transmitter Circuit is shown below:   (View)

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FSK / ASK 315 MHz transmitter circuit

Published:2011/5/8 4:12:00 Author:John | Keyword: transmitter circuit

72015 is a FSK / ASK transmitter designed for the applications of 315 MHz ISM band. It is compliance with EN 300 220 and similar standards. And it can be applied to keyless entry systems, remote control / telemetry systems, data communications systems and security and other systems. The main technical features are as follows: It has fully integrated and stable PLL; Operating frequency is 290 ~ 350 MHz;It has single-ended RF output; Modulation rate caused by crystal pulling of FSK is from DC ~ 40 Kb / s; AS achieves turn on / off keying, which modulates by internal power amplifier. And ASK modulation rate is 40 Kb / s;Supply voltage is within l.9 ~ 5.5 V; It has a low voltage detector; Operating current is adjustable within 3.5 ~ 10.7 mA and standby current is 0.1μA; Output power is adjustable within -12 ~ +8.5 dBm.   (View)

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FM wireless microphone circuit

Published:2011/5/8 4:53:00 Author:John | Keyword: FM wireless microphone circuit

FM wireless microphone makes use of Manifold TA7378 of FM radio. It has few external components. So it is simple to make and is stable, which is especially suitable for production of radio enthusiasts. The specific circuit for FM wireless microphone is shown in the figure. ICl (TA7378P) includes RF amplifier, mixer, buffer amplifier, local oscillator circuit and the bias voltage regulator circuit. The circuit skillfully combines internal circuits. It uses the oscillator circuit and the AFC (Automatic Frequency Control) in order to constitute a variable capacitor circuit, aiming to generate FM (frequency modulation) wave. In order to reduce external effects, it is suitable to add a buffer amplifier between the oscillations and a mixer. Finally, the RF amplifier amplifies to transmit FM radio through the antenna.   (View)

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automatically start air-conditioning circuit with the TC621

Published:2011/5/9 10:39:00 Author:TaoXi | Keyword: automatically start, air-conditioning

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Mini wireless monitoring FM transmitter circuit No.2

Published:2011/5/9 4:07:00 Author:TaoXi | Keyword: Mini, wireless, monitoring, FM transmitter

The Mini wireless monitoring FM transmitter circuit No.2.   (View)

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Mini wireless monitoring FM transmitter circuit

Published:2011/5/9 4:08:00 Author:TaoXi | Keyword: Mini, wireless, monitoring, FM transmitter

The Mini wireless monitoring FM transmitter circuit.   (View)

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Vibration sensing voice FM wireless transmitter circuit (ND-2, TM-801A)

Published:2011/5/9 4:11:00 Author:TaoXi | Keyword: Vibration sensing, voice FM, wireless transmitter

The Vibration sensing voice FM wireless transmitter circuit (ND-2, TM-801A).   (View)

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Livestock fence-breaking alarm wireless transmitter circuit

Published:2011/5/9 4:10:00 Author:TaoXi | Keyword: Livestock, fence-breaking, wireless transmitter

The Livestock fence-breaking alarm wireless transmitter circuit.   (View)

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