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Index 2079

TX03A artificial heart-lung machine circuit

Published:2011/4/18 2:33:00 Author:Ecco | Keyword: artificial , heart-lung, machine

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The sleep massager circuit

Published:2011/4/18 2:30:00 Author:Ecco | Keyword: Sleep , massager

The sleep massager circuit
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The negative oxygen ion generator

Published:2011/4/18 2:37:00 Author:Ecco | Keyword: negative, oxygen ion , generator

The negative oxygen ion generator
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Electronic biological wave Physiotherapy apparatus circuit

Published:2011/4/18 2:41:00 Author:Ecco | Keyword: Electronic , biological wave , Physiotherapy apparatus

Electronic biological wave Physiotherapy apparatus circuit
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Electrical impulses treatment circuit

Published:2011/4/18 2:42:00 Author:Ecco | Keyword: Electrical impulses , treatment

Electrical impulses treatment circuit
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Electronic touch game console composed of 555

Published:2011/4/18 2:48:00 Author:Ecco | Keyword: Electronic , touch , game console , 555

Electronic touch game console composed of 555
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Desk lamp touch switch circuit

Published:2011/4/18 0:59:00 Author:Ecco | Keyword: Desk lamp , touch, switch

Desk lamp touch switch circuit
The touch switch circuitis composed of the buck rectifier, voltage regulator and trigger controlling circuits and other components, touching the metal piece A, then the lamp is lit; and then touching the metal B, then the light turns off.The circuit is as shown. (View)

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The adjustable voltage-controlled oscillator with large duty cycle

Published:2011/4/18 1:28:00 Author:Ecco | Keyword: adjustable, voltage-controlled oscillator , large duty cycle

The adjustable voltage-controlled oscillator with large duty cycle
Voltage-controlled oscillator circuit is as shown. 555, R1, R2, C1 ~ C3 and VT1 form a voltage-controlled multivibrator, FET (JFET) VT is voltage-controlled resistor, which can change the impedance between VT-drain (D) and source (S) by changing the gate-source voltage VGs. The coupled capacitors C1、C2 are connected to D,S of VT, they are used to prevent the influence from rest of the circuit of the DC voltage on the JFET. If making coupling capacitors have no effect on the charging and discharging time of time base circuit, the size of C1, C2 should be 10 times of the timing capacitor C3. The advantages of this circuit: the changing of gate-source voltage VGs can make an adjustable variable resistor Rx (can be as large as several hundred kΩ), then it gets the changing of duty cycle and the cycle. (View)

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Voltage controlled oscillator with Vc-side controlling duty cycle

Published:2011/4/18 0:54:00 Author:Ecco | Keyword: Voltage controlled oscillator , Vc-side, controlling , duty cycle

Voltage controlled oscillator with Vc-side controlling duty cycle
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The multivibrator circuit with variable pitch

Published:2011/4/18 0:40:00 Author:Ecco | Keyword: multivibrator , variable pitch

The multivibrator circuit with variable pitch is composed of two 555 time base circuits, it can issue wave of oscillation changed in 400～2500Hz, and its sound is similar to the sound of the public security police. The circuit consists of power-delay, low-frequency oscillator and the modulation generator. (View)

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CA555 equivalent circuit produced by Radio Corporation of America

Published:2011/4/18 0:50:00 Author:Ecco | Keyword: equivalent circuit , Radio Corporation of America

CA555 equivalent circuit produced by Radio Corporation of America
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555 Equivalent function circuit diagram

Published:2011/4/18 0:47:00 Author:Ecco | Keyword: 555, Equivalent function

555 Equivalent function circuit diagram
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MC1594 AC voltage multiplier circuit

Published:2011/4/14 22:02:00 Author:Jessie | Keyword: AC voltage, multiplier

MC1594 AC voltage multiplier circuit
This circuit is composed by four quadrant multiplier MC1594, the circuit issimple, the accuracy is a bit poor. In order to make the circuit works in linear area, input resistance R1 and R2's values depend on the input voltage's value. R1 equals to V1 multiplied by 6, R2 equals to V2 multiplied by three. If V1=V2=3V, then R1=18kΩ, R2=9kΩ.When there aredifferent input voltages, generally R1=52kΩ, R2=30kΩ, but that would make precision and linearity fell. The relationship of input and output is Vo=V1V2/10. (View)

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Digital pulse width measurement circuit composed of CD4518 and CD4069

Published:2011/3/28 1:53:00 Author:may | Keyword: Digital pulse width measurement

Digital pulse width measurement circuit is show in the diagram. It adopts a 100KHz reference frequency, count at the range of measured signal pulse width, the product of count value and resolving capability present measured signal pulse width value, display through four digital seven-segment LED. The resolving capability is 10μs, its maximum measure width is 99.99ms. IC2, IC3 is double BCD up counter CD4518; IC4~IC7 is BCD seven-segment latch/ decoder/ driver CD4511. (View)

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Family karaoke lighting control circuit composed of 5GM168

Published:2011/3/23 23:24:00 Author:may | Keyword: 5GM168

The design method of family karaoke lighting control is varied, here introduced control circuit is a application circuit with four load light ouput, jump circulate, speed controlable. Light jump speed change along with microphone received voice signal strong or weak, voice signal more strong, light jump faster, or speed is slow. Family karaoke lighting control circuit is shown in the diagram. This circuit mainly consists of power supply circuit, control circuit and audio-frequency amplifier. (View)