Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced into 500+ categories.
We have searched the web to help you find quick solutions & design ideas.

Got Designs?
Please eMail
if you want me to link to and/or post your original design
NOTE:  We make every effort to link to original material posted by the designer. 
Please contact us if our link is not to your site!  Thanks.


Amplifier Circuits:  Video
Amplifier -- Main Page          Audio Circuits -- Main Page


Video Amplifier Circuits:  #'s - B        C - F         G - L         M - P         R - S         T - U         V - Z

 

Last Updated: June 02, 2021 01:44 PM

Circuits Designed by Dave Johnson, P.E.
Boost Infrared TV/VCR Remote Signal   -  This circuit will boost the signal from any infrared TV or VCR remote, extending the range by a factor of 3X.   . . . Hobby Circuit designed by Dave Johnson P.E.-October 05, 2005

Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:

1.3 GHz ATV FM Transmitter-IZ3CTS -  Schematic only __ Designed by va3iul

1.3 GHz FM TV Receiver-ZL1WTT -  Schematic only __ Designed by va3iul

10 GHz ATV Modulator Gunn-Diode-GW6BWX -  Schematic only __ Designed by va3iul

10 GHz Small ATV Transmitter-HB9SLV -  Schematic only __ Designed by va3iul

15 Channels Cascaded MAX455 Video Mux -  On this following circuit shown in the schematic diagram, two MAX455s IC chip are cascaded to build a 1 of 15 video Multiplexer.  This cascading is done by connecting the output of one MAX455 MUX to one input of  a second MAX455 MUX.  The output of the first MUX should be terminated to ground using a 75R resistor, to preserve bandwidth although the two devices are usually close to one another. 

2.4GHz Audio/Video Link -  Maximum legal power easy to build fantastic range cheap__ SiliconChip

2.4GHz Wireless A-V Link -  We've published a few audio/video transmitters/receivers over the years but none were as compact as this 2.4GHz model.  Whether you want it for legitimate security/monitoring applications or simply for fun, it's easy to build and a lot cheaper than buying a ready-made system! __ SiliconChip

23cm ATV FM Transmitter -  Schematic only __ Designed by va3iul

25 Watt MOSFET Audio Amplifier -  High Quality simple unit.  No need for a PreAmplifier __ Contact: Flavio Dellepiane, fladello @ tin.it

2km TV Transmitter -  Here is a simple TV transmitter.  The circuit is simple and really quite crude, but it does include MONO sound.  I have not shown the two regulators in the drawing.  These are one 12v DC 1A series regulator chip, and one 8v DC 1A series regulator.  I fed the 8v regulator from the output of the 12v regulator.  The rest of the circuit looks like this.  It is a free-running Variable Frequency Oscillator   (VFO) using just one coil and one capacitor to determine the frequency.  Change this as you will.  The basic circuit uses a 150pf from the Base of the RF transistor to ground, so that TR2 operates as a "common-base mode"   (grounded base) amplifier.  The tuned circuit in the collector and the capacitor from collector to emitter provide tuning and feedback.

432 MHz to Ch2 ATV Converter-W9NTP -  Schematic only __ Designed by va3iul

450MHz-800MHz UHF Preamplifier -  This circuit is designed to work at UHF frequencies in the range 450-800MHz.  It has a gain of around 10dB and is suitable for boosting weak TV signals __ Designed by Andy Collison

48-Input×16-Output Crosspoint IC Eliminates the Need for Multiplexer Amps -  20-Feb-03 EDN-Design Ideas -   (Transmission line tests 1-kW device using only 100W) Crosspoint switches are ideal for use in video-security systems, which accept multiple camera inputs while providing playback and multiple loop-through to multiple monitors.  To provide video loop-through or monitor outputs, these systems often require additional multiplexer amplifiers that can drive standard video loads__ Circuit Design by Mike Hess, Maxim Integrated Products, Sunnyvale, CA

4-channel video & audio Sequencer -  This next project is a simple circuit for switching your CCTV camera outputs sequentially.  It switches four video and audio channels sequentially, one at a time. It is built around a 555 timer few other components.  The timer is configured as an astable multi-vibrator.  A single-side PCB of the four-channel video and audio sequencer is provided along with the component layout.  After assembling the circuit on the PCB, enclose it in a suitable plastic box. __ Electronics Projects for You

4x4 Video Crosspoint has 100MHz Bandwidth & 85dB Rejection at 10MHz -  DN81 Design Notes __ Linear Technology/Analog Devices

5 Watt UHF TV Amplifier -  This small circuit is a Linear amplifier for driving small UHF TV transmitters.  Its gain is 7dB and can amplify a signal between 450-800 MHz.  You can drive the circuit with 1 to 1,5 Watts signal.  Better use double layer PCB with the second layer connected to earth.  Use a stabilized power supply 25 volts and at least 5Amps.  The transistor case is the SOT-122A and be careful because the transistor is very toxic for your health.  Tuning can be achieved turning the two variable capacitors.  Do not forget to use heat sink for both transistors, specially for the BLW89 and it would be better if you place a small fan as well.

500MHz video Signal transmitter -  Schematic only __ Designed by Peter Jakab

8 x 8 Audio Video Switch -  8 channel switch. __ Designed by Peter Jakab

8-Function Remote Uses One Button, No Microcode -  12/15/09  EDN-Design Ideas Simplify the operation of a remote control__ Circuit Design by Jay Davis, Boeing Integrated Defense Systems, Wichita, KS

902 MHz PLL FM ATV Transmitter -  Schematic only __ Designed by va3iul

A Home Satellite TV System for Less Than 50 Bucks -  Tune into TV signals on the Optus B1 satellite with this surplus gear.  $50 buys you all the bits. __ SiliconChip

A Low Cost Audio/Video Distribution Amplifier -  Easy-to-build unit can distribute six channels of composite video   (& stereo audio) or three channels of S-video. __ SiliconChip

A/V Sender -  This small circuit transmitter processes the signs of audio of a sound table or microphone, and the signs of video of a camera, or still the audio signs and video of a DVD, Video-cassette or even it sweats her video plate has an exit of composed video, you can transmit direct of your computer.  Playing them in a channel free from the strip of VHF __ Designed by Toni on Aug 19, 2009

Adapt Differential Input to Drive Coax -  05/08/97 EDN-Design Ideas Uses an HFA1100 or HFA1105 to convert a balanced input signal to a single-ended output signal, uses positive feedback to characteristic-impedance matching while increasing the available output swing, as compared with using a simp__ Circuit Design by Donald Whitney Jr, Harris Semiconductor, Melbourne, FL

Airline 7 TV set -  A rebadged Sentinel 400TV sold by Montgomery Ward under their in house brand.  Read how I restored and converted this 1949 model electrostatic deflection American TV set for use in Australia __ Contact: blehack @ yahoo dot com

AM TV Transmitter -  Schematic only __ Designed by va3iul

Amplifier removes common-mode noise on RGB differential-video-transmission line -  04/13/06  EDN-Design Ideas Use a single operational amplifier to minimize common-mode signals' effects on differential-component-video receivers__ Circuit Design by Tamara Papalias and Mike Wong, Intersil Corp

An Adjustable Video Cable Equalizer using the LT1256 -  DN92 Design Notes __ Linear Technology/Analog Devices

Apple IIe RGB to CGA -  The 'A2E EXT.80COL/RGB' card gives the Apple //e RGB output to an AppleColor M100 monitor.  I got the card but the monitor seems unobtainable.  I had read that a CGA monitor could be used and I had one of those.  But I found it was not that easy.  The CGA monitor requires the signal to be 60Hz, vsync also and positive pulses on hsync and vsync.  My Apple iie did output a 50Hz signal and a negative pulse composite sync.  I changed the motherboard to the US NTSC version to get 60 Hz and I made this circuit __ Designed by Knut Roll-Lund

Astec Video Modulator Documentation -  This is a four page document of1-video modulator module.  This document includes full circuit diagram ofvideo modulator. 

Audio Video Switch -  This is an 8-input x-output audio/video switch module to be controlled from a computer, for example fromparallel port.  Each audio/video output can be switched to any of8 inputs, separately.1-module drives1-audio/video output and has a34-pin connector to plug intosystem interface.  You can use video OPA-s on 4051 output instead.  Note that you can get full integrated video multiplexers from Maxim __ Designed by Peter Jakab

Audio/Video Sender -  This circuit provides you with wireless audio and visual transmission to a TV.  The TV acts as a receiver, eliminating the need to buy a separate monitor.  You can also hook it up to a VCR or CCD Camera, and even set up a remote CCTV security system!Circuit design __ Contact: info @ wzmicro.com

Audio/Video Transmitter -  Schematic only __ Designed by va3iul

AV Audio/Video Wireless Transmitter -  This circuit provides you with wireless audio and visual transmission to a TV.  The TV acts as a receiver, eliminating the need to buy a separate monitor.  You can also hook it up to a VCR or CCD Camera, and even set up a remote CCTV security system!Circuit design __ Contact: info @ wzmicro.com

A-V UHF TV Modulator -  Schematic only __ Designed by va3iul

AVR (AT90S2313) composite PAL colour bar generator -  I started this project 3 weeks ago, because I was wondering " is that possible, some AVR MCU to create simple colour bars? " At the beginning, I  believed that it's easy.  So, I asked some people who knew more about PAL composite video signal.  The first idea was to work with 8.867238 MHz crystal   (2 times the color carrier).  When I read more about PAL video composite signal creation, I saw that if you want to product colors entire-in-software you must create the color-carrier   (4.43 MHz), changing 4 times the phase of color-carrier   (one time for each color), to show 4 colours.  Except that, you have to change the color-burst from 135 deg to 135+90= 225 deg. __ Designed by © Vassilis Serasidis

Better Cheap Video -  PIC Project  This device uses a PIC16F1825 for improved performance.  Many of its internal features make it a dandy device for this application. __ Designed by Luhan Monat, Mesa, AZ

Boost Infrared TV/VCR Remote Signal -  This circuit will boost the signal from any infrared TV or VCR remote, extending the range by a factor of 3X. . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2005

Browning pre-war FM tuner schematic -  vintage FM Tuner    (schematic) __ Designed by Browning Lab

Build this Simple Circuit A/V wireless transmitter -  This circuit provides you with wireless audio and visual transmission to a TV.  The TV acts as a receiver, eliminating the need to buy a separate monitor.  You can also hook it up to a VCR or CCD Camera, and even set up a remote CCTV security system!Circuit design __ Contact: info @ wzmicro.com


Video Amplifier Circuits:  #'s - B        C - F         G - L         M - P         R - S         T - U         V - Z


HOME Schematics Index Hobby Corner Dave's Circuits Contact Info
Imagineering Ezine Dave Johnson, P.E. Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |   Link to DiscoverCircuits.com  |  Privacy Policy

Copyright  January, 1998 - June, 2021     David A. Johnson  All Rights reserved. 

 COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED!