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Index 447

74 series digital circuit of 74H15 74LS15 3 input nand gate

Published:2011/4/5 22:42:00 Author:Ecco | Keyword: digital circuit, 3 input , nand gate

74 series digital circuit of 74H15 74LS15 3 input nand gate
74H15, 74LS15, 74ALS15, 74S153 input nand gate(OC) (View)

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74 series digital circuit of 74S64 74F64 input and-or-invert gate

Published:2011/4/5 22:48:00 Author:Ecco | Keyword: digital circuit , input , negater

74 series digital circuit of 74S64 74F64 input and-or-invert gate

74S64, 74F64, 74S64 4/2/3/2input and-or-invert gate. 74S64 is totem pole output, 74S65 is open-connector output. (View)

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74 series digital circuit of 74H71 input J - K master-slave flip-flop

Published:2011/4/5 22:44:00 Author:Ecco | Keyword: digital circuit, input J - K , master-slave flip-flop

74 series digital circuit of 74H71 input J - K master-slave flip-flop
74H71 input J - K master-slave flip-flop (with preset terminal) The level of Qo is equal to Q before eatablishing steadystate input. (View)

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74 series digital circuit of 74LS71 input R-S master-slave flip-flop

Published:2011/4/5 22:44:00 Author:Ecco | Keyword: digital circuit, input R-S , master-slave flip-flop

74 series digital circuit of 74LS71 input R-S master-slave flip-flop
74LS71 input R-S master-slave flip-flop( with preset and remove terminal ) Unsteady state. When the preset and remove terminal return in high level, the state could not be kept. And the level of Qo is equal to Q before eatablishing steadystate input. (View)

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74 series digital circuit of 7474 double D type positive edge flip-flop

Published:2011/4/5 22:44:00 Author:Ecco | Keyword: digital circuit , double D type , positive edge , flip-flop

74 series digital circuit of 7474 double D type positive edge flip-flop
7474, 74H74, 74F74, 74ALS74, 74L74, 74LS74A, 74S74, 74HC74, 74C74double D type positive edge flip-flop(with preset and remove terminal) Unsteady state. When the preset and remove terminal return in high level, the state could not be kept. And the level of Qo is equal to Q before eatablishing steadystate input. (View)

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74 series digital circuit of 7476 74H76 double J - K flip-flop(with preset and remove terminal)

Published:2011/4/5 22:44:00 Author:Ecco | Keyword: digital circuit , double J - K , flip-flop

74 series digital circuit of 7476 74H76 double J - K flip-flop(with preset and remove terminal)
Unsteady state. When the preset and remove terminal return in high level, the state could not be kept. And the level of Qo is equal to Q before eatablishing steadystate input. (View)

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Buick GL8 fuel oil level sensor circuit

Published:2011/4/18 4:35:00 Author:Jessie | Keyword: fuel oil level sensor

Buick GL8 fuel oil level sensor circuit
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Buick GL8 injector circuit

Published:2011/4/18 4:33:00 Author:Jessie | Keyword: injector

Buick GL8 injector circuit
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Buick GL8 oxygen sensors, waste gas recirculation and power systems control unit circuit

Published:2011/4/18 4:32:00 Author:Jessie | Keyword: oxygen sensors, waste gas recirculation, power systems, control unit

Buick GL8 oxygen sensors, waste gas recirculation and power systems control unit circuit
(View)

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Buick GL8 idle speed control, oil level switches and oil pressure indicator light circuit

Published:2011/4/18 4:34:00 Author:Jessie | Keyword: idle speed control, oil level switches, oil pressure indicator light

Buick GL8 idle speed control, oil level switches and oil pressure indicator light circuit
(View)

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Pressure test circuit with digital pressure signal disposal device MAX1458

Published:2011/4/18 2:31:00 Author:Jessie | Keyword: Pressure test, digital pressure signal disposal device

Pressure test circuit with digital pressure signal disposal device MAX1458
(View)

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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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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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Start circuit composed of relay

Published:2011/3/30 1:46:00 Author:may | Keyword: Start

Start circuit composed of relay
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Soft-start circuit adopts transistor

Published:2011/3/30 1:47:00 Author:may | Keyword: Soft-start

Soft-start circuit adopts transistor
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Interface circuit of BCL to LED

Published:2011/3/22 1:22:00 Author:muriel | Keyword: Interface circuit , BCL to LED

Interface circuit of BCL to LED
PNP germanium transistors used as a interface of an emitter coupled logic drive LED. The same interface can be used to drive 7-segment Nixie tubeor other LED arrays with common cathode structure, such as Fairchild's FND, 0 or Mon santo company's MAN3. Light-emitting diodes in the figure can switch to optical isolators. (View)

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CNY44 analog isolating circuit

Published:2011/4/2 3:08:00 Author:may | Keyword: analog isolating

CNY44 analog isolating circuit
We can use this circuit when sending analog signal between equipments which have differ ground electric potential. The 3dB bandwidth of this circuit is between 6Hz~80kHz. Between 100Hz and 20kHz, the total harmonic distortion is less than 1.5% when +8V (pak-peak) output level. (View)

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Quack circuit of electronic lark

Published:2011/4/17 23:06:00 Author:Ecco | Keyword: Quack circuit , electronic lark

The quack circuit of electronic lark can emit fluctuated, variable tone birdcall in different lights, its sound is variable. The circuit is shown in the figure. (View)

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Log photometer circuit

Published:2011/4/13 20:53:00 Author:Nicole | Keyword: log photometer

Log photometer circuit
This circuit can be used to test light intensity of air conditioning equipments. The light intensity is changed into voltage(the maximum voltage is 400mV when it is 100000). Photosensor adopts silion photodiode BPX91. This diode is in no load operation, and it will produce output voltage, the voltage has a logarithm relation with light intensity. Transistor BCY58/X amplifys photo-sensitive current, collector-emitter diode can compensate the temperature factor of photodiode. TAA761 and Potentiometer Rp2 makes the light intensity have a function relation with output voltage. The main technical parameters: working voltage: ±15V; consumption current: about 15mA; output voltage(E=100000lx): 0~600mV; the minumim light intensity withtout filter(adopts incandescent lamp): ≈1.5lx; the minumim light intensity with filter: ≈15lx. (View)