This week I dedicated to input device. During this assignment first I go through the adrean website for this assignment then decided the task that I have to connect the different sensers during this assignment. Then I decided to keep I2C connector for load cell, Temperature senser and Step Response Senser.

Group Assignment

Probe an input device's analog levels and digital signals. Please find group assignment link here Click Here

Individual Assignment

measure something: add a sensor to a microcontroller board that you have designed and read it

Circuit diagram

During last week assignment I have downloaded and installed Kicad in my system. Also I have installed fab library into the Kicad. For details please refer Click Here

Then I take components one by one from library.First I took ESP32C3 microcontroller board.

Then similarly I selected the components required for my library like Resister, Led, Connector.

Then I maked circuit diagram for my PCB by keeping selected components in proper place and connected them by using wire.

Then update the PCB from schematic.

Then I started for routing here is the task to minimise cross lines. and then start routing. I took 0.7 mm trace width for routing.

I had more trouble during routing my three connections are overlapping so then I added zero resister into the schematic.

Then Again update the pcb and make the border for PCB. and this is the final output.

Then export that png file and then open the mods ce.

Save the .rml file

First select the png file then invert the file and select the bit. I have selected 1/64 which is 0.04 for trace and 1/32 for cut 0.08. then select the x, y, z and job height 12.then convert the file and download the .rml file.

Milling

Then I switched on the milling machine and open the v-panel software. I had much trouble to mill this pcb.First, I kept the depth cut 1026 mm but my pcb not milled. The bit is not milling the traces. Then I increase the cut depth to 2016 mm still my pcb is not milling then I again increase the cut depth upto 3016mm but then there is the size of pcb is the problem that not milled on that pcb due to less space.

Then I removed the old PCB and paste the new PCB on the board so I can able to give file again but this time my border file is come closer to pcb edge so there is problem of break the bit hence I stoped the machine. My traces are milled good.Then I tried to give border file but its not proper.

So I paused the machine and again given the file for milling traces but this drill is come out and broken. This is may be due improper tightning the drill bit or the mistake during export the file.

Again I observed the pcb where bit broken I think I forgot to invert the file in mods ce by observing milled PCB in details..

Then I again change the PCB and paste the new one and done milling, then finally it get completed. Thanks to my instructor mr. Suhas, he guided me for milling PCB.

Soldering

Then I done soldering..

Before going to the soldering I find the components required for soldering in our fab inventory.

Original Files

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