Week #5 - Journal

Ideation

Tell us about your assignment's idea for this week. Why do you care about this idea? What inspired you? (Please include images or links to sources of inspiration)

drawing bot

my idea is to build a drawing bot as i like drawing and coloring with kids 🥳.. It's also for kids to do and they can decorate it
I got inspired from these videos

https://www.youtube.com/watch?app=desktop&v=YObNgxrPKpQ

https://www.youtube.com/watch?v=2R1i-ioEjwE

The idea is to attach color pens to a cup or box and add motor and battery, so when the motor is connected to the battery, it will rotate making the colors draw scribbles on a white paper.

Tool Chain

Which software/machines/materials did you use in the assignment? Why?

first, i used tinkercad to simulate my connections.
then, i started implementing my assignment.

I built my circuit on bread board and tested it.

I used DC motor, LED, 220 ohms resistor, on/off switch, crocodile wires, jumper wires, breadboard, 5V DC adaptor and DC socket jack.
Last, I integrated my circuit within the device cardboard enclosure and made openings by scissor for the components (motor, led, switch and jack) to be seen, and i added color pencil crayons and taped them in cardboard corners.

Simulating my circuit on tinkercad

https://www.tinkercad.com/

building my circuit on bread board and testing it

Design/Preparation Process

Explain the design and/or preparation process of your assignment. How did you use the tool or software to design and/or prepare your assignment before fabrication/implementation?

simulating my drawing pot on tinkercad

building and testing my drawing pot

first, i used tinkercad to simulate my connections. I used DC motor, LED, 220 ohms resistor, on/off switch, breadboard, 5V DC power supply
i connected motor and led with resistor in parallel with the power supply (so each component will take 5v and needed current and will work with maximum capability).
then i connected the on/ off switch in series to my circuit connection so when the switch is on it will give the volt and current to the led and motor
- the motor needs 5v and will rotate with maximum capacity 9994 rpm and around 80 ma current
- the red led will take 1.8 v and 10 ma current and the rest of volt the resistor will take

My drawing pot device performs 2 outputs at at the same time (emits light by LED and makes movement by motor).
tinker cad simulation link
https://www.tinkercad.com/things/6lSvLnQpFcV-mighty-bruticus-wluff
then i built my circuit on bread board and tested it. I used DC motor, LED, 220 ohms resistor, on/off switch, crocodile wires, jumper wires, breadboard, 5V DC adaptor and DC socket jack.

Development/Implementation Process

Explain the development/implementation process of your assignment. How did you use the machine/tool to manufacture or implement the design of your assignment?

I prototyped my electrical circuit on a breadboard..
- i attached two jumper wires to 5v adaptor socket (red for positive 5v and black for ground) and i connected them to breadboard in two different columns
- i connected the led in the bread board and attached the 220 ohm resistor to it's cathode (short part), pos. and neg. of LED to pos. and neg. of adaptor (under it in the same columns), it works 👍
- then i connected pos. and neg. of motor to pos . and neg. of adaptor (in same columns), by that i connected both the led and motor to adaptor in parallel connection, both worked (by this connection both led and motor will have 5v and the needed current for them to work by maximum efficiency).
- last i connected the on/ off switch to my circuit in series connection by connecting pos. of adaptor to pos. of switch (one terminal) and neg of switch to pos. of breadboard.. by that when the switch is on, it will conduct current and volt to the rest of my circuit.
I integrated my circuit within the device cardboard enclosure and made openings by scissor for the components (motor, led, switch and jack) to be seen, and i added color pencil crayons and taped them in cardboard corners.

I got a box, sticked colored crayons in the corners, opened holes for non electric components

then, I Enclosured all my circuit components inside a cardboard box and kept the non-electric parts (LED, switch, Motor, DC power socket) prototyped out from the cardboard.

The electrical circuit is prototyped on a breadboard

WhatsApp Video 2025-01-25 at 10.13.39_67bec8e9.mp4

WhatsApp Video 2025-01-25 at 10.13.56_c3d58ce5.mp4

WhatsApp Video 2025-01-25 at 10.14.16_9cde105d.mp4

Community of Learning

Did you ask for feedback? What are the ideas that others have contributed or suggested? What was someone else’s idea that you built upon? How did you help your peers? How did your peers help you?

WhatsApp Video 2025-01-25 at 15.28.31_dfb1a873.mp4

my drawing bot started to move

yes, i asked suggestions from my instructors to make my model move, and they suggested to add a weight to the DC motor, so i added an eraser and it started moving a little bit.
Dr. Ahmed Saed told me also to put a weight on one end of the motor and to stick it firmly on the edge of the cardboard
increasing voltage may be also helpful (from 5v to 9v) as it will increase the rpm of the motor.

Overcoming Challenges

When you got stuck, what/who did you turn to? At what point did you have to pause to research or learn more before moving on? What are some mistakes, pitfalls, or challenges that others can avoid if they were doing this assignment?

i got stuck on connecting the on/off switch as it has 3 pins not 2 as the tutorials, so when i connected it at first, the project wasn't working
I solved the problem by searching it's datasheet to connect it correctly
the datasheet described that:
- pin1: output (5v)
- pin2: to the positive of the led (in my circuit connection as i am connecting the switch in series to my circuit)
- pin 3: will be left empty without connection

on/off switch 3 pin datasheet

Final Project

How can you use the skills and knowledge that you've acquired this week in your final project?

I learnt about simulating electrical circuits on tinkercad and connecting electrical circuits using breadboard, and i will use that in building my final project's electrical circuit

WOW!

What is the coolest thing that you've learned this week? What is something that you will never forget from this week?

i learnt how to connect 7 segment
i tried it by my self byconnecting a resistor to each led that i want to light and it worked
but after the midweek session, i saw the tutorial and i learnt that i can add only one resistor on common pin 3 as all leds are connected in parallel

Title of Media

Weekly Digest [OPTIONAL]

Tell us about any other cool things that you've made this week: in the Hands-on activity, tutorial examples, exercises, or any other cool mini-project that you tried out aside from the assignment.

I am working with my students in building lego models for sea creatures preparing them for FLL competition
so I Learnt with them about some sea creatures that live in each ocean layer and what they eat, danger that they can face

My students are building lego models for sea creatures habitats

Assignment Design Files

File Name [FORMAT]

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