week 5

Concept

Inspiration

Sanding

This week's task is to build an electronic circuit provided that there are at least two outputs working at the same time, so I came up with this application to make a portable Sanding & Drawing-board

Ideation

The idea is to use a small 5-volt motor or a small fan and exploit the rapid movement of the rotors in random drawing or sanding small figures.

tool chain

software : Tinkercad

It is online software from Autodesk, I think it is a discovery for me. It is used in modeling and building electronic circuits and simulating them, and this is the best part about using it. It allows you to build any electronic circuit because it has a large library of electronic components and the wonderful feature of writing codes through blocks that are built, in addition to the usual method of writing using text.

components of circuit

Adaptor 5 v

LED

Jumpers Wires

Mini Breadbord

Van 5v

resistor

Buzzer

Slidebutton

Tools of the crafting

Cutter

Glaw Gun

Cardboard

Sissor

Design / preparation process

connecting in parallel

Why connect in parallel?

Connecting in parallel is the best way when you want to combine more than one electronic component. This is so that we can use the same voltage difference coming from the current source. This is the opposite of connecting in series, which divides the voltage difference between each component, and therefore we will not be able to connect many components at the same time.

start simulation

How to connect in parallel?

The positive terminal coming from the source must pass through the positive terminals of all electronic components together, and the negative terminal coming from the source must pass through the negative terminals of all components together.

Description: The positive end of the bazer, the positive end of the LED that is preceded by the resistor, and the motor end were connected to the positive end of the power supply, and this was cut off with an operating switch that passes current to them or prevents it, while the negative end of both the bazer and LED and the other end of the motor were connected to the negative end of the power supply.

Why do I put a resistor with the LED only, and why is it only 220 ohms?

According to the data sheet for the LED, it needs 20 MA, and the power supply provide 5 volts, and according to Ohm’s law, which states that the voltage over the current equals the resistance, so it needs to 250 ohms, so the closest number to this is 220 ohms.

Why do i use an adapter that provides 5 volts?

I used a 5 volt adapter because all components operate at 5 or less, more than that can burn components.

buzzer operates with 5 volts

fan runs on 5 volts

LED needs 3 volts, so I put a resistor

Assembly 🛠️

Circuit description

It was connected in parallel to maintain the voltage difference for each electronic component, which is 5 volts
A 5 volt adapter was used because the motor needs this voltage, and this problem was solved in the LED, which only needs 3 volts by placing a 220 ohm resistor.
When the switch is turned on, the circuit is opened, and thus the buzzer emits a continuous beeping sound with the presence of the LED that lights up in red, and then the fan rotates quickly and this rotation is used to apply a small sander to smooth and prepare the figures and small accessories.

Enclosure 💁

step 1

step 2

step 3

step 4

Tools and materials

Cardboard 20*20 was used
wax gun
cutter
ruler
Wire adhesive

Mounting & assembly

I cut the cardboard to the required sizes, which are 10 cm
I hollowed out the holes for the outlets and installed the electronic components
It was assembled in the form of a small box inside which the breadboard and wires were stored
The fan was placed and fixed at the top, and next to it was an alert LED
The buzzer and ignition switch are placed on the front
I made a small side hole on the left for the power inlet

Challenges 🥹

I did not correctly calculate the size of the hole for the adapter inlet to exit, and after installation, I discovered this error and corrected it by making this hole

There was difficulty inserting the electronic components, especially the LED, which almost broke. It was supposed to be installed before installing the bottom base.

Assembling and inserting the cables was a hassle, but I held them together with duct tape so I could get them under control

Files & Resources💾

Tinkercad file

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