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TD6301I(2)C bus control display drive IC diagram

Published:2011/9/13 2:28:00 Author:Rebekka | Keyword: bus control display drive

TD6301I(2)C bus control display drive IC diagram
TD6301 is an I (2) C bus control display drive integrated circuit. It is widely used in low-voltage high-grade players and other audio equipment, car audio. TD6301 IC contains 3 groups of 7-segment display drive circuits and the input state selection circuit. The IC uses 28-pin plastic dual in-line structure, the IC 5 pin functions and data arelisted in Table 2. The pin functions and data of TD630lAP IC are shown in table. (View)

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Panasonic NV－450 VCR system modification circuit diagram

Published:2011/8/22 3:26:00 Author:Jessie | Keyword: Panasonic , VCR system , modification circuit

Panasonic NV－450 VCR system modification circuit diagram is shown as the chart. TA7673P is a special radio frequency modulation integrated circuit, and its sound carrier frequency is 5.5 MHz. T1 and Cllare connected tothe pin 4andpin5 of rf modulation integrated circuits, which can determine the oscillation frequencyof voices. Therefore, the method ofchanging sound carrier frequency from 5.5 MHz to 6.5 MHz is: change C11 of LC resonant circuit from 47p to 27p, then connect VCR with television, let video replay a box of good video, then watch videos as side trimming the magnetic cores of Tl to make the sound best. (View)

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Electronic transformer with dependable performance

Published:2011/4/14 6:52:00 Author:may | Keyword: Electronic transformer, dependable performance

Electronic transformer with dependable performance
The circuit can steady work to consult the circuit diagram with no changes. Output voltage is 11V-13V, output current is 6A, working frequency is 60kHz. It can change working frequency by changing the numerical value of C3, C4, R1, R2. Its no-load current is very small. (View)

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Parallel push-pull voltage changer

Published:2011/4/14 6:52:00 Author:may | Keyword: Parallel push-pull, voltage changer

Parallel push-pull voltage changer
This circuit adopts two capacitors with 100μF to make up man-made star point. When shutting off, this circuit can prevent transistor from destroying by high back voltage. Using regulation resistance with 50Ω can adjust the turn on level of transistor. The usage of 0.1μF capacitor is toincrease thespeed of on-off. The data of transformer: Winding np= 160turns, 0.5mm copper lacquered wire nr= 13turns, 0.2mm copper lacquered wire ng= 1300turns, 0.15mm copper lacquered wire The transistor in parallel push-pull transformer should have the ability of high withstand collector-emitter back voltage. (View)

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Voltage changer controls frequency by blocking oscillator

Published:2011/4/14 6:50:00 Author:may | Keyword: Voltage changer, blocking oscillator

Voltage changer controls frequency by blocking oscillator
This circuit is mutual coupling by three windings of blocking oscillator transformer. This let two transistors in turns tocontrol and turn on. Each pulse can change the state of transformer, because two transistors cut off in a short time, and, later the transistor which is cutting off before is turn on because the voltage of transformer is reversing. The duration of two half-wave is the same. This time depends on the parameter of RC link. The oscillation frequency can easily adjust from 50Hz to 1kHz. Data of transformer Tr1: Wing n1= 100turns, 0.5mm copper enameled wire n2= 90turns, 0.5mm copper enameled wire n1= 150turns, 0.5mm copper enameled wire Data of transformer Tr2: Wing na= 25turns, 1.9mm copper enameled wire (double wrap) nr= 20turns, 0.43mm copper enameled wire (double wrap) na= 1160turns, 0.43mm copper enameled wire (View)

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Switching supply driving transformer

Published:2011/4/14 6:48:00 Author:may | Keyword: Switching supply, driving transformer

The introduction of winding coiling of high frequency transformer (switching supply driving transformer) Switching supply driving transformer EE-18 We can choose EE-18 magnetic core or the assorted skeleton of EI-18. One can put N1 and others winding in insulating barrier, N2, N3 double winding along with N4, N5. N2, N3, and N4, N5 is in insulating barrier. (View)

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Single-stage multi-channel input circuit of tube by coupling resistor

Published:2011/10/14 1:44:00 Author:Ecco | Keyword: Single-stage , multi-channel input, coupling resistor

Single-stage multi-channel input circuit of tube by coupling resistor
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KA2181 application circuit diagram

Published:2011/10/16 21:57:00 Author:Ecco | Keyword: application circuit

KA2181 application circuit diagram
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M50126P logic frame circuit diagram

Published:2011/10/16 22:26:00 Author:Ecco | Keyword: logic frame

M50126P logic frame circuit diagram
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LMl872 application circuit diagram

Published:2011/10/16 22:25:00 Author:Ecco | Keyword: application circuit

LMl872 application circuit diagram
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Low-impedance input circuit diagram of tube

Published:2011/10/14 1:39:00 Author:Ecco | Keyword: Low-impedance input, tube

Low-impedance input circuit diagram of tube
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Multi-channel audio input mixing circuit of tube

Published:2011/10/14 1:52:00 Author:Ecco | Keyword: Multi-channel, audio input mixing

Multi-channel audio input mixing circuit of tube
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Common-anode loaded inverter circuit of tube

Published:2011/10/14 1:50:00 Author:Ecco | Keyword: Common-anode loaded inverter

Common-anode loaded inverter circuit of tube
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The shape circuit of common potentiometer

Published:2011/10/14 1:42:00 Author:Ecco | Keyword: shape, common potentiometer

The shape circuit of common potentiometer
a). b): potentiometer with switch c): Slide potentiometer d): asynchronous different double-axis potentiometer e): locking-type potentiometer (View)