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Candidate 2 evidence

N5 Engineering Science Assignment 2019 Candidate 2

SQA | www.understandingstandards.org.uk 1 of 16

Worksheet 1 b

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The relay activated and the motor Nothing to amend due to my initial result started turning. was my expected result.

The motor started slowing down and Nothing to amend due to my initial result

then stopped. was my expected result.

The relay activated and the motor Please see attached amendment below .

started turning.

(5 marks)



Task 1c

Version 1.0

Task 1

Start 0- --. � Ir�-- - --

Set: Output? Off

s�-1 --1 r

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____ L1 -----

L �e_t: ?�!Put7 on /ra

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/ -;e�:�tput7 Off 111 ,-----

\. Stop )

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I have added in a new pin test to test if the master switch is still on, if so, the flowchart will behave as normal, with the push-to-make switch needed to turn the motor off, if the master switch is off before the push to make switch is needed, the flowchart would skip right to the end, bypassing the need for the push to make switch, whilst the master switch is off, turning off the motor.

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Task 1d

1

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main: �

.-. ,;. labelO:

4 SWitch o:f:f 3

5 i:f InputO is On then labell

6 goto labelO

..., labell: '

,-, Ci SWitch on 3

·� i:f InputO is On then label2

lD label3:

11 SWitch o:f:f 3

12 end

13 label2:

14 i:f Inputl is On then label3

15 goto label2

1 6 goto labe 13

17



Worksheet 1 e

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Improvement

Version 1.0

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When the master switch (SPST) is switched on, a 6 Volt circuit activates, turning on a motor.

I

Whilst the 6 Volt circuit is active, pressing the position sensor (Push-To-Make Switch) will turn off the 6 Volt circuit, making

the motor slow down and stop.

If you turn off the master switch before the position sensor is activated, the 6 Volt circuit would turn off, making the motor

slow down and stop.

To improve this circuit, we could improve the motor is some way that it stops quicker, as at the moment, the motor takes a '

few seconds to fully stop.

(4 marks)



Task 2a

Version 1.0



Task 2b

I a Teeth Input Gear I 64 Teeth

Version 1.0



Worksheet 2c

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�'1 ffi)uti 0u;titit ,Begutt.ecf I� /AGmJll 1ffigo"g{J 1(ffl

� � "el�f'Jltl.b 11 ffl�·,r..tlo: _.,. -

1 -N.'easutie :tbe in�� At least¥, t��·

8 Teeth 64 teeth 40: 1 � � � ttat�uta.fe

€40•: di) ·e.e (4ttill v-etdGi� tatfQ..

-· - � ..

(2 marks)

Version 1.0



Worksheet 2d

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Version 1.0

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My gear system has an output speed ratio of 40 (40 : 1 ), fitting

the requirements needed.

My gear system makes effective use of compact gears to

effectively fit into smaller spaces, fitting the requirements.

!

(2 marks)



Worksheet 3a

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'r .� i---'---------�'------.a....;....;.;..._...;._ _____ ""'t'-_-----:-_

When the stage is down, push the up button whilst the safety guard 'fllie pfstan sf:IQpll oufstreke ana ffie !is active. � �ll:mcrte t:JD. i

The piston will outstroke, therefore Wlfe(Vffie�lfs t1�., p_Qil}l{l\e moving the stage up.

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When the stage is up (piston is outstroked), press either the down button 1 on the stage, or down button 2 on the ground level, and the piston should instroke, making the stage go down.

l�Wf.1-- �,fl�,�� ' �-� i dh ·MJiQl:lfl� lft:el

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-- - - - -�L -· -

.or -.. ------

1fme�.-sb3iiii �bite and'-the �8'1iffi. �- a.ovm.

The stage will go down as the piston will instroke.

I (4 marks)

Version 1.0



Worksheet 3b

.

1,

1,

l�ent Adding safety guards, similar to the one on the up button, on both

down buttons.

- - .. -·--

� 'C,Q)i -- � - So somebody could not accidentally press the down button, causing the stage to go down

� -·

-�tqi!bJjjiifs 2 spring return, plunger actuated 3/2 valves r�1'

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(3 marks)

Version 1.0



Version 1.0



Worksheet 4

Version 1.0

µ S V T 500 Q 500 Q 500 Q 500 Q

sv

(4 marks)



Worksheet Sa(i)

Version 1.0

Master Switch

special effects 1 Light 1

j Sound I

(2 marks)



Worksheet Sa(ii)

Subsystem: Special Effects

1------------------------------

I

I ,

Master I

I H

Turn Wait 0.5 Turn Repeated . - microcontroller ---1 f--. ---I Switch light on seconds light off 10 times?

Turn Siren on

+ Wait 5 Seconds

Turn H-t

Light and Siren Off sound

I

L-----------------------------J (5 marks)

Version 1.0



Worksheet 5b

I have set the times repeated to O here, to ensure that the lights flash only 10 times.

When the master switch is activated, the lights will start to flash 10 times.

This area is where the lights flash on, wait half a second and turn off.

The flowchart will go back to the start and set the ti mes repeated to O and wait for the master

switch to be activated.

Version 1.0

St1Jrt

No

Turn Light On

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Wait 0.5 I

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l. I

.

.

I .

Waits

Turn Siren Off .

'------· ·····�················'

I've named a variable 'times repeated' to represent the number of times the light has flashed on and off.

In this area, I add 1to the number of times repeated, and check if the number of times repeated is 10, if so, the siren will come on, if not, the lights will flash again until the number of times repeated is 10.

In this area of 3

blocks, the siren will turn on, wait 5

seconds and then turn off.

(4 marks)



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