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VIDEO CIRCUIT

Video Schematic Circuits Collection

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Video Distibution Amplifier with Five Outputs

Video fans and professionals in the field will find in this small signal distributor-amplifier an excellent ally when it’s necessary to distribute a single video signal across several equipments. The circuit shown here should have a lot of applications. Basically, the distribution amplifier takes the composite video signal from a video player (VCR) or a video generator (analogue output) and buffers it in such a way that it can be simultaneously applied to up to five different video equ [...]

mais de 4 anos atrás

S-video Converter Circuit

With the astonishingly rapid growth in the market for flat-screen TVs and high-definition TV, many CRT television sets have been consigned to the attic, even though many of them were still working perfectly and could have been used as spare sets in a bedroom or another room, for example. Although all current flat-screen receivers have very comprehensive facilities and include digital inputs via DVI or HDMI connectors and analogue inputs in S-video format, this was unfortunately not the [...]

mais de 4 anos atrás

AM Video Modulator

Here's the simple design allows ATV to be transmitted from a low-power (up to about 3W) FM or CW transmitter. Ideally the transmitter should use CW mode and have its 'key' down but an FM rig will work just as well if the microphone is disconnected and the PTT switch is closed. The only reason for disconnecting the microphone is to prevent sounds from it frequency modulating the carrier. All the design does is interrupt the supply current to the power amplifier and possibly also the dri [...]

mais de 5 anos atrás

Video Mixer Using the GT4123 and GT4123A

The GT4123 and GT4123A are the first dedicated single device, two input video mixer ICs available to the professional video and multimedia. Read more for description and circuit diagram. A PC board which uses two GT4123 mixers, two GB4551 back-porch clamps and a GX4314, 4x1 video switch is available from GENNUM. This board can be used to gain experience in using these devices in a simple Effects Generator application. Figure 5 shows the circuit of this board which contains the video si [...]

mais de 5 anos atrás

Video Signal Amplifier

This electronic circuit is a video signal amplifier that offers a broad band amplifier with a bandwidth of 5 MHz which will take the video signals from your VCR and will amplify them sufficiently to drive up to 3 monitors, TV sets (provided that they can accept direct video signals), or other VCR's for recording from one video to up to three others. The video signal amplifier will also make possible to record from one video to two others and at the same time have a monitor connected to [...]

mais de 5 anos atrás

PIC16F84 Video Generator

Here's the project was to construct a Composite Video Pattern Generator, which can be used as a teaching tool in the video field as well as a laboratory instrument, useful for repairing and adjusting television receptors. This video generator instrument is in no way intended to be a commercial set, because I cannot guarantee all the specifications that a professional tool must have. However, the result is a high quality video equipment. Download PIC16F84 Video Generator for ASM-HEX Cod [...]

mais de 5 anos atrás

Sync-Tip Clamp/Restorer with AGC and De-Emphasis

This video circuit is Sync-tip Clamp/Restorer with AGC and De-emphasis. The active component used IC MAX7450. Below video clamp/restorer with layout and PCB   Source :  http://www.g8ajn.tv/

mais de 5 anos atrás

Monitor Test Program

The Monitor Test program is a Windows application which comes in the help of electronics technicians for adjusting computer monitors and for general users for testing the quality of their monitors.It displays different patterns on the screen and it also allows to change the resolution from 640x480 to 1600x1200. These patterns are useful for checking or adjusting the convergency, focus, brightness, contrast, dynamic convergency, geometry and the overall quality of CRT monitors (CRT mean [...]

mais de 5 anos atrás

Video-Based Motion Sensor

The design is primarily based on an analog integrator circuit. The circuit integrates (i.e., sums) the input-voltage signal over a defined period of time. Based on an op-amp, the ideal circuit is shown in Figure 3. The factor –(1/RC) is constant, so the resulting output is inverted and proportional to the sum of the integrated values (i.e., proportional to the average of the signal in the integrated period of time). This is all it takes to “compress” the analog video signal.Although it [...]

mais de 5 anos atrás

Triple Video Buffer with Filter TSH173

This Triple Video Buffer with filter is designed to aid in the evaluation of the TSH173, a single supply triple video buffer featuring an internal gain of 6 dB and an internal low pass filter with an 8.2 MHz cut-off frequency for each channel, in compliance with standard-definition requirements for video line interfaces.Features4.5 V to 5.5 V single supply operationR-G-B, Y-Pb-Pr, Y-C-CVBS driving3 channels with 6 dB gain buffer3 video reconstruction filters for SD (standarddefinition) [...]

mais de 5 anos atrás

Video Buffer and Filter with SAG Correction Based on The TSH120

This evaluation board Video Buffer and Filter circuit is based on the TSH120 video buffer. The TSH120 includes a voltage feedback amplifier with an internal gain of 6 dB, rail-to-rail output, internal input biasing and SAG correction. A power-down function provides a sleep mode with ultra low power consumption.FeaturesVery low consumption in active and standby modeInternal reconstruction filterInternal gain of 6 dBRail-to-rail outputOperating supply voltage from +2.2 V to +5.5 VSAG cor [...]

mais de 5 anos atrás

Video Modulator Circuit TDA6800(T)

The TDA6800 is a modulator circuit for modulation of video signals on a VHF/UHF carrier. The circuit requires a 5 V power supply and few external components for the negative modulation mode. For positive modulation an external clamp circuit is required. This circuit can be used as a general purpose modulator without additional external components.Features· Balanced modulator· Symmetrical oscillator· Video clamp circuit for negative modulation· Frequency range 50 to 800 MHzOutput impeda [...]

mais de 5 anos atrás

The Difference Between a RF Modulator and Video Switcher

RF modulators make it possible to connect devices to televisions where it would otherwise be impossible to. Video switchers make it possible to connect more than one device to the same input without the need for changing out the wires every time you want to switch equipment.RF ModulatorsRF modulators are useful devices for people who own televisions with RF/coaxial-only inputs because without the RF modulator there would be no way to connect a DVD player or video game console to the te [...]

mais de 5 anos atrás

AM Video Modulator

The first section of the video modulator performs a video level clamping function. The high input impedance Darlington amplifier and the small series coupling capacitor combine to achieve an excellent low-frequency response and a clamping function with very rapid response time. A three terminal voltage regulator sets the clamping level to 8 volts.The clamped video is then level shifted through a zener diode and applied to a single video amplifier stage. A PNP transistor in the collecto [...]

mais de 5 anos atrás

Video Amplifier with Sync Stripper and DC Restore EL8102

The circuit transmits 200MHz (-3dB bandwidth) video signals while stripping off the sync pulse and performing DC restoration. It is configured for a typical video cable driver application driving a double-terminated 75O load, where the EL8102 (IC3) is configured for a gain of +2 to ensure unity gain throughout.Sync StrippingIn component video systems it is frequently necessary to remove the sync pulse from an RGB signal. Sync is often combined with one or more of the red, green, and bl [...]

mais de 5 anos atrás

Video Amplifier LH0032

This electronic circuit is Video Amplifier Application using Integrated Circuit (IC) LH0032, High Speed Op Amp Applications.Circuit SchematicTypical ResponsePart ListR1= 15Kohm+15KohmR12= 100ohm trimmer C3=4.7pF ceramicR2-3-4= 10Kohm R13-15= 47ohm IC1= LH0032 (datasheet)R5.....9= 1Kohm R14= 10Kohm S1= 1X2 mini switchR10= 820ohm C1= 10uF 63V MKT S2= 1X6 sel.R11= 1Mohm C2-4= 100nF 63V J1-2= BNC connector

mais de 5 anos atrás

Connecting your Computer to a Television

It is a nasty surprise when you switch your monitor on and nothing appears on screen after a patient wait. Even though the resolution is much low, a television may help you to conduct basic procedures (copying your files for example) in such an emergency. You may think that this is only possible through expensive VGA cards but it's not true. A simple circuit can combine the VGA synchronization signals into composite TV synchronization signal. Following circuit by Tomi Engdahl carries o [...]

mais de 5 anos atrás

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mais de 5 anos atrás