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Index 538

electronic all birds paying homage to the phoenix NE555，CD4017 circuit

Published:2011/8/25 20:14:00 Author:chopper | Keyword: electronic, all birds paying homage to the phoenix

electronic all birds paying homage to the phoenix NE555，CD4017 circuit
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Electronic birthday candle circuit

Published:2011/7/26 5:35:00 Author:chopper | Keyword: Electronic, birthday candle

Electronic birthday candle circuit
Electronic birthday candle includes a candle and a Happy Birthday Song. It imitates the shape of traditional birthday candles and adopts the operation mode like lighting and blowing candle, it is very interesting, the circuit is shown as picture. It consists of a 412 input end and nand-gate CD4011,and D3, D4 form the trigger RS, it uses two output states of trigger to control the lighting, blowing as well as the play and stop of the candle. (View)

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touch type voltage regulator circuit of NE555,CD4017

Published:2011/7/25 2:45:00 Author:chopper | Keyword: touch type, voltage regulator

touch type voltage regulator circuit of NE555,CD4017
The picture shows the touch type voltage regulator,which can adjust the photoconductive resistance mainly by changing the brightness of LED,and then adjust the conduction degree of the bidirectional thyristor through triggering the diode trigger circuit, and ultimately achieve the purpose of the voltage regulation.The circuit is shown as picture.It consists of bidirectional thyristor trigger circuit, LED brightness adjustment circuit as well as regulating impulse generation and control circuit. (View)

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Nokia 7xxx Mobile Schematic Diagram 03

Published:2011/8/12 3:10:00 Author:Joyce | Keyword: Mobile , Schematic

Nokia 7xxx Mobile Schematic Diagram 03 (View)

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function and data of pins of integrated circuit TDA9815

Published:2011/7/25 2:37:00 Author:chopper | Keyword: function, data, pins, integrated circuit

function and data of pins of integrated circuit TDA9815

TDA9815--Intermediate frequency signal processing integrated circuit TDA9815 is the intermediate frequency signal processing integrated circuit produced by Philips,which is applied to large-screen color TVs.1.function characteristics　　TDA9815 IC contains the image intermediate frequency signal processing circuit, accompanying sound IF signal processing circuit, voltage-controlled oscillator circuit, the image IF input switch circuit, standard switching circuit, medium-level AGC circuit,tuner AGC circuit, AFT control circuit, and other auxiliary circuits. (View)

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Over-voltage Instruction Circuit Composed of 555

Published:2011/8/12 3:03:00 Author:Joyce | Keyword: Over-voltage , Instruction, 555

As shown in the figure is an over-voltage instruction circuit, which is composed of multivibrator, detection circuit, and LED (light-emitting diode) etc. The multivibrator constitutes of 555, R1, W1 and C1 ect, and it is connected with the collector of the triode and grounding feet 1 of 555. When the monitored voltage exceeds the set value ,the stabilivolt DW will be punctured to break over detector tube BG1.The multivibrator starts oscillation for the connection of power circuit, and the oscillation signal output will drive the LED to flash. Breakdown voltage of stabilivolt DW and the resistance of current limiting resistance R3 can be chosen according to the voltage to be monitored. (View)

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Nokia 7xxx Mobile Schematic Diagram 06

Published:2011/8/12 3:08:00 Author:Joyce | Keyword: Mobile , Schematic

Nokia 7xxx Mobile Schematic Diagram 06 (View)

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function and data of pins of TDA9808T integrated circuit

Published:2011/7/25 2:30:00 Author:chopper | Keyword: function, data, pin, integrated circuit

function and data of pins of TDA9808T integrated circuit
TDA9808T--quasi sound separation, PLL frequency discrimination and intermediate frequency processing integrated circuit.　　TDA9808T is the PLL frequency discriminator IF processing integrated circuit of quasi-audio-visual separation produced by Philips,which is widely used in various screen color TVs, its function and data of pins are listed in Table 78. (View)

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Nokia 7xxx Mobile Schematic Diagram 05

Published:2011/8/12 3:07:00 Author:Joyce | Keyword: Mobile , Schematic

Nokia 7xxx Mobile Schematic Diagram 05 (View)

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Nokia 7xxx Mobile Schematic Diagram 04

Published:2011/8/12 3:09:00 Author:Joyce | Keyword: Mobile , Schematic

Nokia 7xxx Mobile Schematic Diagram 04 (View)

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Serail LED Nixie Tube Dynamic Scanning Display Circuit

Published:2011/8/13 23:59:00 Author:Joyce | Keyword: Serail , LED , Nixie Tube, Dynamic, Scanning, Display

Serail LED Nixie Tube Dynamic Scanning Display Circuit
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Parallel LED Nixie Tube Static Display Circuit

Published:2011/8/14 0:54:00 Author:Joyce | Keyword: Parallel , LED , Nixie Tube , Static , Display

Parallel LED Nixie Tube Static Display Circuit
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LM555 broad dynamic pulse width modulator circuit

Published:2011/7/24 3:36:00 Author:chopper | Keyword: broad dynamic, pulse width, modulator

LM555 broad dynamic pulse width modulator circuit
Broad dynamic pulse width modulator is mainly formed by the integrated timer circuit and integral circuit. As a result of op-amp, the temperature stability is good, linear dynamic range is wide, and the narrowest output pulse is 2μs, the widest pulse is 6ms,the ratio of wide, narrow pulse can reach 300:1. With the change of the modulativon input signal, the corresponding change of output pulse width will happen, resulting in the effect of pulse-width, and it can also output a saw-tooth-wave voltage signal at the same time. (View)

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Parallel LED Nixie Tube Dynamic Scanning Display Circuit

Published:2011/8/14 0:55:00 Author:Joyce | Keyword: Parallel, LED , Nixie Tube , Dynamic , Scanning , Display

Parallel LED Nixie Tube Dynamic Scanning Display Circuit
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Nokia 7xxx Mobile Schematic Diagram 02

Published:2011/8/12 3:11:00 Author:Joyce | Keyword: Mobile, Schematic

Nokia 7xxx Mobile Schematic Diagram 02 (View)

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Movement direction sensor(CD4011) circuit with gate circuit

Published:2011/7/22 3:04:00 Author:chopper | Keyword: Movement, direction sensor, gate circuit

Movement direction sensor(CD4011) circuit with gate circuit
Movement direction sensor isan essential circuit component of the production counters on the auto-product line.The picture shows the movement direction sensor formed by nand-gate CD4011,but this sensor is designed to identify the positive direction of movement,not to identify the opposite direction of the movement, it is a one-way motion sensor. (View)