-Electronics Design-

Objective:

- This week we’re required to redraw the Echo Hello-World board, and add at least a button and LED (with current-limiting resistor). Then check the design.

Echo Hello Board (below) is a model of a Board trace that I will draw using the EagleCad software.

Working on Schematic Design:

I started by downloading fab.lbr from the FabLab Archives, then downloaded the library file Fab.lib.. Next I Copied the downloaded file into the (lib) folder in EagleCad. To add an element I click (Add Icon ) and it takes me to the elements library, then, I scroll down in the list to fab which contains all the required elements for this assignment. When I double click on the element, it will be added on the worksheet. To keep the element chosen on the board click escape. I kept repeating this process until the board was complete and I was ready to connect the components.

Below is a list of the main components on the Board:

1- Att. 44

2- FTDI

3- ISP: AVRISP

4- Resonator- XTAL1

5- R1-Resister

6- C1-Capacitor ( CAP-US1206FAB)

7- LEDFAB1206 (to be added)

Problems and difficulties:

- The first issue I faced, was trying to find the correct element name in the EagleCad list from the board trace. I mean the name of the element in the board is not the same in the EagleCad library. Also,in EagleCad there’s more than one option for the same component.

Milling:

This process is done by a machine (CIRQOID) with an automatic drill, and connected to the drill are pins with several sizes. After accomplishing 100% in the routing process for my Schematic Design, I converted the design to CMP format to be able to start cutting using the CIRQOID cutting machine. After doing several tests, I finally cut my board and was happy with the result. I did not face any problems during this process. machining process of using rotary cutters to remove material[1] from a workpiece by adva direction at an angle with the axis of the tool.[2][3] It covers a wide variety of different operations and machines, on scales from small individual parts to large, heavy-duty gang milling operations. It is one of the most commonly used processes in industry and machine shops today for machining parts to precise sizes and shapes.

Milling can be done with a wide range of machine tools. The original class of machine tools for milling was the milling machine (often called a mill). After the advent of computer numerical control (CNC), milling machines evolved into machining centers (milling machines with automatic tool changers, tool magazines or carousels, CNC control, coolant systems, and enclosures), generally classified as vertical machining centers (VMCs) and horizontal machining centers (HMCs). The integration of milling into turning environments and of turning into milling.

Soldering:

Since I am not experienced in soldering, this process was very difficult for me especially dealing with very small components. In the end I was able to

complete this task. The problem I had with the soldering process was finding the correct components and parts. Also, placing the component in the correct direction

on the board.