Circuit Diagram

100MHz quartz crystal oscillator circuit

Published:2011/7/4 6:12:00 Author:Christina | Keyword: 100MHz, quartz crystal, oscillator

The high precision frequency oscillator circuit which is composed of the 100kHz quartz crystal resonator and the phase inverter is as shown in the figure 1, the phase inverter 2 and phase inverter 3 are the shaping circuit. Figure 1 The 100kHz quartz crystal oscillator circuit   (View)

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1MHz quartz crystal oscillator circuit

Published:2011/7/4 6:08:00 Author:Christina | Keyword: 1MHz, quartz crystal, oscillator

The oscillator circuit which is composed of the 1MHz quartz crystal resonator and the NAND gate is as shown in the figure, the NAND gate 3 is the output buffer stage. This circuit can be used to calibrate the standard frequency. Figure 1 The 1MHz quartz crystal oscillator circuit   (View)

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The low-speed single steady circuit

Published:2011/7/4 4:32:00 Author:Seven | Keyword: low-speed, single steady circuit

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The low-frequency astable circuit

Published:2011/7/4 4:33:00 Author:Seven | Keyword: low-frequency, astable circuit

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The key switch circuit

Published:2011/7/4 4:34:00 Author:Seven | Keyword: key switch

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The key waking circuit

Published:2011/7/4 4:30:00 Author:Seven | Keyword: key waking

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The balcony burglarproof lamp

Published:2011/7/4 5:56:00 Author:Borg | Keyword: balcony burglarproof lamp

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The cultural relic security alarm circuit of ND-2

Published:2011/7/4 19:42:00 Author:Borg | Keyword: cultural relic, security alarm

The circuit is shown in Figure (b), which consists of the vibrating sensor, relay control circuit, alarm sound generating circuit, audio power amplifier circuit and AC step-down rectifier circuit, etc. It can be used in situations of the precious object security, storeroom, safe locker, vehicle and door/window anti-burglary, etc. ND-2 is a all-direction vibrating sensing module, in figure (a) is its function frame diagram.   (View)

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The water boiling alarm circuit

Published:2011/7/4 19:52:00 Author:Borg | Keyword: water boiling alarm

This water boiling alarm circuit consists of 4 triodes, whose circuit is shown in the figure. In the figure, the transistors T2 and T3, resistor R2 and capacitor C,etc, compose the audio oscillator, the audio signal is output from the loudspeaker. The transistor T1, resistors R1 and W, the transistor knot be and Rt, etc, compose a switch circuit as the switch of the oscillator. Rt is the temperature sensing element, which is equal to the bias resistor of T1. Usually, Rt is reversely blocked, T1 is also blocked; when the temperature is rising up, the reversal resistance of Rt is falling down, the current leakage is rising up.   (View)

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The gas leakage alarm

Published:2011/7/4 6:14:00 Author:Borg | Keyword: gas leakage alarm

The gas sensor can form a gas leakage wireless remote control alarm, when the gas leakage is over the content of the safety standard, the sensor is outputting a detecting signal, and the wireless emitter circuit is emitting alarm signal after the signal is amplified and processed. In the figure is the gas leakage wireless remote control alarm which consists of the gas sensor(QM-N10), when the gas leakage is over the regulated standard, the relay will pull in and get the working power supply of the emitter circuit through. The emitter circuit of the alarm has not been drawn in the figure.   (View)

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The radar monitor language alarm

Published:2011/7/4 6:02:00 Author:Borg | Keyword: radar monitor, language alarm

The circuit consists of the microwave sensing part TWH9248／TWH9249, single steady time delay circuit, language alarm circuit, FM emitter circuit and power supply circuit,etc.   (View)

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The Smoking Ban and Fire Warning Board Circuit

Published:2011/7/4 6:20:00 Author:Borg | Keyword: Smoking Ban, Fire Warning

When someone walks past the valid range of the warning board, this circuit will make the sound of twang```no smoking, no fire .   (View)

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Benz SRS composition and installation location circuit

Published:2011/7/4 2:01:00 Author:Christina | Keyword: Benz, SRS, composition, installation, location circuit

Benz SRS composition and installation location circuit   (View)

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Benz W140 model SRS composition and installation location circuit

Published:2011/7/4 1:59:00 Author:Christina | Keyword: Benz, SRS, composition, installation location

Benz W140 model SRS composition and installation location circuit   (View)

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Powerhope UPS battery cannot charging maintenance circuit diagram

Published:2011/6/24 2:29:00 Author:Ecco | Keyword: Powerhope , UPS battery , cannot charging, maintenance

Repairing parts: 1. good or bad of four diodes D30, D31, D32, D33 in bridge rectifier; 2. leakage of filter capacitor C27 ; 3. good or bad of LM317; 4.LM317 external resistors R83, R80, R81, R82, R83, R86 is changing value or not; 5 charging diode D34 is good or bad.   (View)

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465kHz amplitude modulation intermediate frequency signal generator circuit

Published:2011/7/4 1:54:00 Author:Christina | Keyword: 465kHz, amplitude modulation, intermediate frequency, signal generator

The 465kHz amplitude modulation intermediate frequency signal generator circuit is as shown in the figure 1. The 400Hz low-frequency multivibrator is composed of the VT1 and VT2, the 465kHz intermediate frequency oscillator is composed of the VT3, VT4 and the ceramic filter 3L465. The 400Hz low-frequency modulates the 465KHZ intermediate frequency signal through C3, and the modulated 465kHz intermediate frequency signal is output by the emitter VT4. The ceramic filter of the circuit has the frequency selection function. The potentiometer RP can be used to adjust the output amplitude. Figure 1 The 465kHz amplitude modulation intermediate frequency signal generator circuit   (View)

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Accord 2003 vehicle cruise control circuit diagram

Published:2011/6/26 22:40:00 Author:Ecco | Keyword: Accord 2003 , vehicle , cruise control

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16-pin diagnosis connector reading wiring circuit

Published:2011/7/4 1:56:00 Author:Christina | Keyword: 16-pin, diagnosis connector, reading, wiring circuit

The 16-pin diagnosis connector reading wiring circuit   (View)

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BENZ 560SL ABS system circuit

Published:2011/7/4 2:05:00 Author:Christina | Keyword: BENZ, ABS, system circuit

BENZ 560SL ABS system circuit   (View)

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Non-Transformer Type Product Detection (MC1596G) Circuit Diagram

Published:2011/7/1 23:59:00 Author:Vicky | Keyword: Non-Transformer, Product Detection

The above picture is a non-transformer type product detection circuit. The circuit uses MC1596G instead of LC resonance and transformer. The circuit is available in a frequency range from low frequency to a relative wide frequency of 100MHz, that is to say, it works by changing the parameter of RC low part filter in output part. The circuit is available in Mixer, Frequency Doubler, and modulator etc.   (View)

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