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Index 1733

Mazda 95TAURUS (without DRL) headlights and fog lights circuit

Published:2011/6/21 0:39:00 Author:John | Keyword: headlight, fog light

Mazda 95TAURUS (without DRL) headlights and fog lights circuitis shown. (View)

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High-pass filter circuit

Published:2011/6/20 5:57:00 Author:John | Keyword: High-pass filter

High-pass filter circuit
High-pass filter (HPF) cuts off signal frequency which is below -3dB cutoff frequency and allows for signal frequency which is above the cutoff frequency. Figure (a) and Figure (b) show single high-pass filters. These are inversions of LPF single low-pass filters. Capacitance is placed in series in the signal path but the inductance is placed in parallel in the signal channel. The model shown in the figure (a) is T-shaped structure that shown in the figure (b) is Ⅱtype filter. (View)

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Mazda 94THUNDERBIRD airbag circuit

Published:2011/6/21 0:28:00 Author:John | Keyword: airbag

Mazda 94THUNDERBIRD airbag circuit is shown. (View)

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Mazda 94THUNDERBIRD electric antenna circuit

Published:2011/6/21 0:28:00 Author:John | Keyword: electric antenna

Mazda 94THUNDERBIRD electric antenna circuit is shown. (View)

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MOSFET active preselector circuit

Published:2011/6/21 0:27:00 Author:John | Keyword: active preselector

MOSFET active preselector circuit is shown. (View)

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varactor diode adjusting MOSFET active preselector circuit

Published:2011/6/21 0:27:00 Author:John | Keyword: varactor diode, MOSFET active preselector

Varactor diode adjusting MOSFET active preselector circuit is shown. (View)

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MOSFET variable RF gain control circuit

Published:2011/6/16 11:46:00 Author:John | Keyword: variable RF

]In the two kinds of MOSFET circuits, the fixed bias network is used to set the gate G2 with a positive DC voltage. It can be replaced with a variable voltage circuit, just as shown in the figure. The potentiometer in the figure can be used as RF gain control device, in order to reduce the gain impact on the strong signal and increase the gain on the weak signal. This design allows the active shunts to prevent strong signal form overloading. figure: MOSFET variable RF gain control circuit (View)

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The electronic rodent repeller circuit diagram 2

Published:2011/6/14 20:31:00 Author:Lucas | Keyword: Electronic rodent repeller

The electronic rodent repeller circuit is relatively simple, it is composed of 5 times pressure rectifier circuit (rectifier diodes VD1 ~ VD5 and capacitors C1 ~ C5) and labyrinth electrodes, and the circuit is shown as the chart. AC 220Y voltage is rectified and filtered by rectifier diode VD1 ~ VD5 and capacitors C1 ~ C5 to produce a pulse DC high voltage with about 1.5kV, which is added on the 220V voltage ends of labyrinth electrodes, when the rat steps on the electrode, the current passes the rat, the mouse will die as electric shock. R uses 1/2W metal film resistor. C1 ~ C5 select ceramic capacitors with the voltage in 600V. VD1 ~ VD5 use 1N4007 silicon rectifier diodes. (View)

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Broken line alarm production circuit diagram

Published:2011/6/14 3:46:00 Author:Lucas | Keyword: Broken line , alarm, production

Broken line alarm production circuit diagram
(View)

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BG602 charger circuit

Published:2011/6/16 22:14:00 Author:chopper | Keyword: charger circuit

BG602 charger circuit
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A3 norm power supply circuit

Published:2011/6/14 8:24:00 Author:chopper | Keyword: power supply

A3 norm power supply circuit
(View)

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The 200MHz cascode amplifier circuit principle diagram

Published:2011/6/20 21:54:00 Author:Seven | Keyword: cascode, amplifier circuit

The 200MHz cascode amplifier circuit principle diagram is shown in the above figure. AGC range:59dB; power gain:17dB;L1=0.07 μH central head; L2=0.07 μH the plug is at the 1/4 point from the earth terminal (View)

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The PLL FM demodulator (LM565CN、RC4558DN) circuit

Published:2011/6/16 20:48:00 Author:qqtang | Keyword: FM demodulator

The PLL FM demodulator (LM565CN、RC4558DN) circuit
In the figure is a 10kHz±3kHz FM demodulator circuit consisting of LM565CN. The differential demodulation of V1 and V2 is level-shifted and amplified by A1 difference amplifier in figure (b), then the 20KHz pulse impulse momentum is removed by LPF composed of A2. (View)

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The bilateral band modem circuit composed of NE561B

Published:2011/6/16 20:55:00 Author:qqtang | Keyword: bilateral band, modem circuit

In the figure is the bilateral band modem circuit composed of NE561B. The loading frequency of the input modulating signal is f0=1MHz. When the AM modulation signal is added on the input terminal of the multiplier, it is also added on the phase detection circuit by Rv1, CY1, Y2 and CY2, and it sets the VCO frequency of PLL at f0. (View)