Ramsey AVS10 Automatic Sequential Video Switcher Kit Instruction Manual PDF (EN)

Ramsey Electronics Model No. AVS10 Don’t miss a beat; watch 4 cameras on one monitor! Perfect for multiple video camera installation, stores, household surveillance systems, and more! Automatic sequential switching of up to 4 separate video sources Perfect for security cameras and baby monitors Enable or disable video sources with the flick of a switch Manual “hold” selection of any source Variable front panel timing control Easy one evening assembly Add our matching case and knob set for a pro look AVS10 – 1 AUTOMATIC SEQUENTIAL VIDEO SWITCHER

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Write or call for our free AUTOMATIC VIDEO SWITCHER KIT INSTRUCTION M Ramsey Electronics publication No. MAVS10 Revi First printing: January 2001 COPYRIGHT 2001 by Ramsey Electronics, Inc. 590 Fishers Station Dri 14564. All rights reserved. No portion of this publication may be copied o written permission of Ramsey Electronics, Inc. Printed in the United Stat AVS10 – 2

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AUTOMATIC SEQUENTIAL VIDEO SWITCHER TABLE OF CONTENTS Introduction ................................... 4 Circuit Description ......................... 4 Block Diagram ................................ 5 Parts List ........................................ 6 Parts Layout Diagram .................... 7 Schematic diagram ....................... 8 Assembly instructions ................. 10 Initial Testing ............................... 13 Troubleshooting ........................... 13 Ramsey Warranty ........................ 15 RAMSEY ELECTRONICS, INC.

590 Fishers Station Drive Victor, New York 14564 Phone (585) 924-4560 Fax (585) 924-4555 www.ramseyelectronics.com AVS10 – 3 Ramsey Publication No. MAVS10 Manual Price Only $5.00 Ramsey Publication No. MAVS10 Manual Price Only $5.00 INSTRUCTION MANUAL FOR INSTRUCTION MANUAL FOR

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INTRODUCTION In today’s world there are many situations that require monitoring, but no one can be in four places at once. Now, with the AVS10, you have the opportunity to see four different locations and keep an eye on your precious property. The front doorbell is ringing, the baby is napping, one of your children is playing with friends on the backyard trampoline and another is shooting hoops in the driveway. Of course, you need to be in the kitchen or home office and even with the proverbial parental “eyes in the back of your head” you can’t possibly keep an eye on everyone! With the AVS10 and four inexpensive video cameras you can do the impossible.

And if you see a situation that requires a longer look, simply press the SCAN/STOP button and take as long as you need to assure you that all is well. The AVS10 is the perfect baby/playroom monitor, allowing you the freedom to monitor the action without having to be physically present. You can keep an eye on your shed, boat or other outdoor property as well. We believe you’ll find dozens of applications for this useful kit and at a fraction of the cost of commercial video switchers! . CIRCUIT DESCRIPTION The AVS10 takes advantage of the Motorola 68HC908 family’s power, thus eliminating the need for bulky logic gates to control the switching of up to 4 input video signals.

By periodically testing the state of each enable switch (S1:1 – S1:4), the microcontroller (U1) will activate the respective video control switch (U2:A – D) enabling each individual video feed. The 68HRC908JK1 microcontroller uses an RC (Resistor & Capacitor) network to set up the controlling frequency. Resistors R1, R2 (variable front panel potentiometer), and R3 along with the fixed value capacitor C1 make up the timing circuit for the system. The front panel speed control (R2, variable potentiometer) lets us vary the control frequency from about 2MHz to 8MHz.

This is how the scan rate between the input video signals is controlled giving the user full range from approximately 1 to 5 second switching times. The SCAN/STOP button (S3) lets the user stop on any active video channel and hold that particular feed for indefinite viewing. The active low enabling of the IRQ line (U1 pin 1) from S3, the SCAN/STOP button, gives easy access to the end user for other remote scan stop triggering in custom applications. Using the CD4066 Bilateral Switch (U2) as the actual video control switcher lends itself nicely to this application.

The quad bilateral switch was intended for the transmission or multiplexing of analog or digital signals with a switch “ON” frequency response of up to 40 MHz! This is really overkill for a video switch unit but it offers great performance and extremely low switch leakage between the video channels when powered. AVS10 – 4

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