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POWER  SU PPLY

he  power  supply  converts  the  110-vo lt  A C   power  obtained 

from  a  standard  e le c tric   outlet  in  your  home  to  a  safe  working 

level  of  12  volts  D C .  This  low  voltage  DC  is  used  to 

power  M IN IV A C   and  is  connected  to  a ll  terminals  + 

and  -   on  the  power  p a n e l.  Most  toy  e le c tric   trains 

use  the  same  lo w -vo ltag e  power  as  M IN IV A C   and 

therefore  working  w ith  the  M IN IV A C   is  as  safe  as 

operating  an  e le c tric   tra in .

The  POWER  SW ITCH   is 

used  to  turn  power  O N   and  O F F . 
The  power  should  be  O F F   when­

ever  you  are  w iring  the 

computer.  Following  this 
p ractice  w ill  establish  good 

working  habits  and  w ill  help 

to  prevent  accid en tal  short- 
c irc u its .  The  power  must  be 

turned  O FF   when  the  computer 
is  not  in  use.  The  red  power  light 

shows  when  the  power  is  O N .

The  red  button  above  the  power  sw itch  labeled  C IR C U IT   BREAKER* 

is  a  safety  switch  w hich  au to m a tically  turns  o ff  the  power  supply 

when  it   is  o verlo ad ed .  An  overloaded  c irc u it  or  a  sh o rt-circu it 

w ill  cause  the  c irc u it  breaker  to  "b lo w "  just  lik e   a  household 
fu se.  A   short  c irc u it  occurs  when  +  is  w ired  d ire c tly   to  - 

without  a  component  in  betw een.  The  power  supply 

may  be  restored  to  normal  operation  after  a  short- 

c irc u it  by  changing  the  fa u lty   w iring  and  then 

pushing  the  red  c irc u it-b re a k e r  button  back  in .

C A U T /

o n

:

Do  N O T   hold  the  c irc u it-  

breaker  button  in  if   it 
continues  to  " b lo w ."   Turn 

power  o ff  and  determine  the 
cause  for  drawing  excessive 
current  before  proceeding 

w ith  the  experim ents.

N o w .. .   .plu g  the  POWER  C O R D   into 

a  standard  110-vo lt  A C   (N O T   D C) 

o u tle t,  and  you  are  ready  to 

G E T   A C Q U A IN T E D  

W ITH  M IN IV A C   6 0 1 ...........

3

Содержание Minivac 601

Страница 1: ...Getting acquainted with M i n i v a c 6 0 1 SCIEN TIFIC r j DEVELOPM ENT 3 T i r S t S t e p corporation toward the exciting world of electronic w data processing via digital computers ...

Страница 2: ...ssing machine This is the first in a series of books using M IN IV A C 601 to demonstrate the fundamentals of modern digital computers This book acquaints you with M IN IVA C 601 The second book in this series relates the components of M IN IVA C 601 to corresponding parts of a large commercial digital computer Other books enable you to use M IN IVA C 601 to discover how these parts function to ma...

Страница 3: ...ay Controls Itself 17 PAGES _ _ _ _ _ E S P i5 P i fSLIDE SW ITC H ES 18 Experiment 10 Slide Switch O peration 19 RO TARY SW ITCH 20 Experiment 11 Manual Operation of Rotary Swi t c h 21 Motor D rive 22 Resistors 22 Decimal Input Output 22 Experiment 12 Basic Motor Operation 23 Experiment 13 Motor Driven Rotary Sw itch 23 Pulse Generator 24 Programmer 24 Experiment 14 Motor Reversing 24 8 M A TRIX...

Страница 4: ...was prepared and edited by the staff of Scientific Development Corporation First Printing August 1961 EX LIBRIS ccapitalia net Copyright c 1961 by Scientific Development Corporation 372 Main Street Watertown Massachusetts ...

Страница 5: ...ter is not in use The red power light shows when the power is O N The red button above the power switch labeled CIRCUIT BREAKER is a safety switch which autom atically turns off the power supply when it is overloaded An overloaded circuit or a short circuit w ill cause the circuit breaker to blow just like a household fuse A short circuit occurs when is wired directly to without a component in bet...

Страница 6: ...h CLO SED CIRCUIT PRINCIPLE For any electrical device to operate it is necessary for electrical current to flow THROUGH the d evice A closed electrical circuit must be established to let the electrons flow from the negative power supply terminal through the component to the positive power supply terminal Thus all electrical components on the M IN IV A C 601 require at least 2 connections to operat...

Страница 7: ...th the second programming w ire These connections cause lamp 1 to light when the Power Switch is turned on This simple circuit is discussed further in Experiment 2 Disconnect the programming wire by pulling both ends from the computer terminals Do N O T disconnect the program ming wires from the console by pulling on the wire because the wire may break A ll programming wires should be disconnected...

Страница 8: ... above it In order for a light to turn O N to lig ht current must flow THROUGH the light The electrons must flow IN on one wire and OUT on another w ire This is the closed circuit principle for lights The terminals labeled A and B on either side of each light are used to supply the electrical power to turn the light O N A light comes O N when terminal A is connected to one power supply terminal or...

Страница 9: ...be disconnected after each experiment is completed V Any of the lights may be operated by connecting programming wires from to A and from to B just as was done for light 1 Make connections to two or more lights at once IB The circuit diagram looks like this The lights are used in later experiments to represent numbers The light O FF w ill represent a zero 0 and the light O N w ill represent a one ...

Страница 10: ...and Z The three contacts for each of the six pushbuttons are all connected to terminals in the same manner When the pushbutton is UP an electrical connection is made between terminals Y and Z When the pushbutton is D O W N the electrical connection is switched to terminals Y and X Terminal Y is connected to the common contact and is always used when the pushbutton is connected in a circu it When a...

Страница 11: ...use the circuit is closed through the switch Push up and down slowly on pushbutton 1 and carefully watch the operation of the two lights One light always goes OFF before the other light comes O N There is a position with the pushbutton only partly depressed where both lights are OFF Try to find this position The switch breaks one connection before it makes the other connection The pushbuttons are ...

Страница 12: ... time and see light 2 go O N A complete circuit is now made through both pushbuttons It is possible to connect more than two push buttons in series and make a circuit where aM the pushbuttons connected must be pushed down before the circuit is completed Construct a series circuit using three or more pushbuttons by your self to demonstrate this principle The circu it with terminal numbers indicated...

Страница 13: ...down both pushbutton 1 and pushbutton 2 at the same tim e The circuit is closed and the light comes O N if either pushbutton 1 is down OR if pushbutton 2 is down OR if both pushbutton 1 and pushbutton 2 are down at the same time 1 0 6 More than two pushbuttons may be connected in parallel to make a circuit where any one of the pushbuttons may be pushed down to complete the circu it To demonstrate ...

Страница 14: ...own in a circuit diagram the contacts are ALWAYS shown with the relay O FF Notice that terminals H and Gand terminals L and K are not connected when the relay is O FF Also terminals H and J and terminals L and N are not connected when the relay is O N The MINIVAC relays are mounted on the computer panel with the contacts of the relay switch visible The relay arm is in the middle between the other ...

Страница 15: ...en the relay is O FF and to turn light 1 O N when the relay is O N for this circuit is 1 G 1A 2B 2 Turn power O N Light 2 comes ON A G ently push the relay crossbar to the le ft Light 2 goes O FF and light 1 comes O N Watch the relay arm alternately touch one contact and then the other as the relay crossbar is moved back and forth The circuit looks like this 1G 1A IB 1 13 ...

Страница 16: ...s fv opera he i Relay Switches jm m j Je th r in 2 lsConnected hSwitches USHT Three terminals are located directly above _ each relay on the computer panel These OO o O 7 i i i i H J terminals are connected under the panel to the relay c o il Two terminals are connected A directly to the relay c o il and the third O O J terminal is connected to a light wired in t N series with the relay coil as sh...

Страница 17: ...Now connect the other set of relay contacts 1 K 1L IN to two unused lights so one lij comes O N when the relay is OFF and the other light comes O N when the relay is O N Try this yourself To modify this program so that the coil indicator lamp w ill light when the coil of relay 1 is energized remove connection 1 1 E add connection D y lC The circuit for this modified part of the program is 12 1 iy ...

Страница 18: ...he switch contacts of relay J_ supply power to relay 2 by closing the circuit to the coil of relay 2_ Release relay 1 and press pushbutton 1 Relay 1 is turned O N by pushbutton 1 relay 2 is turned O N by the switch contacts of relay 1 and light 2 is turned O N by the switch contacts of relay 2 Thus the pushbutton controls relay 2 through the contacts of relay 1 5 1 It is possible to connect severa...

Страница 19: ... interrupts current flow through the coil and turns the relay O FF The relay indicator light turns O FF and shows that the relay is no longer energized The relay circuit has now returned to its original condition Operate the circuit back and forth a few times by first pushing push button 1 then pushbutton 2 The circuit used in this experiment is called bistable because it is able to remain in eith...

Страница 20: ...mmed on the computer and it may be used for other computer switching functions as w e ll Each of the six slide switches has six terminals A O 0 located directly above it on the computer panel These terminals are connected underneath the panel to the slide switch contacts The terminals are labeled R S T U V W and are connected in the same manner for all six switches Each switch is identified by its...

Страница 21: ...B 1A 1 R 2A 1W 1S 1 1V 1S 2 Move switch 1 to the LEFT and turn the power O N V Light 1 comes O N but light 2 remains O FF Trace the closed circuit for light 1 and the open circuit for light 2 on the circuit diagram 4 Move switch 1 to the right Light I goes OFF and light 2 comes O N Trace the open circuit for light 1 and the closed circuit The circuit for the experiment looks like this 19 ...

Страница 22: ...of contacts on the rotary switch dial in turn The wiper arm rotates with the pointer knob and makes an electrical connection with each set of contacts in turn around the rotary switch dial see the following illustration The contacts are designated by D Decimal Input Output 8 terminal number 1 to 19 for example D8 The contact on the wiper arm is referred to as D16 For example when the pointer knob ...

Страница 23: ... before making connection with the next contact The switch operation is described as break before m ake and thus is sim ilar to the pushbutton switches Rotate the pointer knob back and forth a few times between numbers 1 and 2 Connect several other lights to the rotary switch terminals to demonstrate that an electrical connection is made from D16 to each term inal More than one terminal may be con...

Страница 24: ...s terminals 18 and 19 stop to halt the motor drive RESISTORS The electrical resistors used with the motor drive limit the current which flows through the circuit in the same way that the lights limit the amount of current which flows through a relay c o il The resistors make it possible to connect a short circuit across the STOP terminals to stop the motor without over loading the power supply DEC...

Страница 25: ...he motor drive again stops this time because power is no longer connected to the motor circu it 6 z 6 Y 6 X Pl9 MOTOR DRIVEN ROTARY SWITCH This experiment demonstrates how the motor driven rotary switch may be used to generate electrical pulses for the computer and to automatically perform a series of operations in sequence J I Connect the motor to operate with pushbutton control using the circuit...

Страница 26: ... a series of computer operations are called a program All digital computers including MINIVAC 601 must be programmed to solve a specific problem The use of the rotary switch for programming is explained and demonstrated in future experiments I 1experiment 1 4 MOTOR REVERSING I IJ Connect power to the rotary switch motor through two sets of slide switch contacts so that the direction of current flo...

Страница 27: ...ms When the computer is programmed to play tic tac to e the various plays are recorded by making connections on the matrix terminals When the computer is programmed to recognize characters the characters are formed by making connections on the m atrix Games and character recognition problems are presented in other books in this series AUXILIARY TERMINALS A uxiliary terminals are provided between t...

Страница 28: ...tes Processes information and controls its operation making logical decisions and performing arithm etic Generates output information representing answers to a problem The components generally used in modern digital computing equipment are discussed and their operation is compared with the operation of analogous components in M IN IVA C 601 tSHOW d e c is io n s Book III provides an introduction t...

Страница 29: ...sed in high speed digital machines the Binary Arithmetic Operations are explained and demonstrated with appropriate programs for M IN IV A C 601 Book V uses M IN IVA C 601 to demonstrate how computer functions may be combined to perform specific jobs Examples of computer applications are examined under five major headings Simple Computer like Devices Encountered Every Day Computer Applications in ...

Страница 30: ...relay 1 comes ON and remains ON when pushbutton 1 is pushed and released Relay 1 goes OFF and remains OFF when pushbutton 2 is pushed and released Terminal 2Z may not be used for this problem Refer back to the relay experiments if you have trouble with this problem 10 Design a circuit in which relay 1 comes ON when pushbutton 1 is pushed if slide switch 1 is left and relay 2 comes ON when pushbutt...

Страница 31: ...i i 2B 2 Jll 2 J 1 1Z 2 Z ANSWER 2 1 1Y 2Y 1A 1Z 2X 1B l 1V 2 Z ANSWER 3 1 1Y 1V 2Z 1V 2X 2Y 1A 1B l ZX zz ZY 1 2 X ZY 1A Z Z ZB 1 ANSWER 4 1 1Y 1Z 2X 1X 2A 2Y 1A 2B 2 1B l 2 Z 18 1 ANSWER 5 1 1S 1S 1 Y 1Y 2Y 2X 1X 1V R 1V IA 1B l ANSWER 6 1 1Y 2V2T 1V l R 2S 1A 1S 2Y 1 1B 29 ...

Страница 32: ... 1 2 2 B 2A 1T 2 2F 2C 1U 1 1B 0 1A lR lS 1 2A lT 2 2F 3 o2B 2e i 2C W IV t l IF IE 0 l6 1W ANSWER 9 1 1G 1G 1X 1Y 1H 1H 1C 1F 1 1F 2Y 1E 2X 2Z not used 1 J ANSWER 10 1 1 Y l l S 1R l C 1T 2C 1F 1 2F 2 1R 1C 0 IE IF toeoc 2C IT IS IX 1 2 iy 1 0 1 ANSWER U 1 1H 1H l Y 1Y 2Y 1X 1C IF 1 2X 2C 2F 2 1G 1R 1S 2S 2T 2J 2H 1A 1 B 2 30 ...

Страница 33: ... G 2J 2S 1 H 2H 2 iy IX i 12 Q Q JU U U U 22 1 C jE IF 1 2V a JtM i 2X 2C 2B 2F 2 ANSWER 13 6 6Y 6 6A 6B 6 6VD17 D18 M 6B 6m Dll M 6Y 64 p is P19 ANSWER 14 5 5Y 5Z 6X 6Y D17 M D18 5X 5Y 5 5Z 6X 6y P17 M D18 D19 answ er 15 6 6X 6Y D17 M D18 D18 5X 5Y D19 6 ANSWER 16 5 5Y 5Z 6X 6Y 6J 62 5 X 6Z 6C 6F 6 6J 6K 6 6G 6G 6N 6L D18 6H D17 ...

Страница 34: ... 6 5 Z P17 PIS 5 Y M Plfe P l9 po ANSWER 19 D1 1A 6 6Y D2 2A 6 D17 D3 3A M D18 D4 4A M D16 D5 5A D6 6A 1B l 2B 2 3B 3 4B 4 5B 5 6B 6 M PJ 7 26 1 1 OgL 3 33 v l 3 A P3 T I 4A P4 5 5B i 5 A V 6 6B O 1 a 6A Pt T 7 7 6X b b Z bY M D ie M 6 0 9 ANSWER 20 1 1 B 1 1C 1A 1 E 1E 2G 1F 2F 1H 1F 1G 1Y 1 Y 1 1V 1J 1J 2H 2J 2E 2E 2A 2B 2 2 2C 3 z ...

Страница 35: ......

Страница 36: ...M IN IV A C 601 AN D THE M IN IV A C M ANUAL ARE PRODUCTS O F i l k SC IEN TIFIC DEVELOPM ENT CO RPO RATION 372 Main Street Watertown Massachusetts ...

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