Microcontroller Based Eggs Incubator : WEEK 7

Title: Etching-PCB

Introduction

A printed circuit board (PCB) mechanically supports and electrically connects electronic components using conductive tracks, pads and other features etched from copper sheets laminated onto a non-conductive substrate. PCBs can be single sided (one copper layer), double sided (two copper layers) or multi-layer. Conductors on different layers are connected with plated-through holes called vias. Advanced PCBs may contain components - capacitors, resistors or active devices - embedded in the substrate.

Objective

1. To etched PCB circuit using manual technique.
2. To design the circuit based on the actual circuit project applications.

Project Encountered

For this week there are no problems to complete the project progress

Project Description

Step 1

First, save circuit design from PCB Wizard software. Then,print the circuit PCB the bottom side layer on a piece of paper from A4 sticker paper. Use a laser printer, not an inkjet. If your printer uses ink cartridges and not toner cartridges, it will not work.

Step 2

Stick the A4 sticker paper that has been printed with the project circuit on the PCB board. Use masking tape to stick it on.

Step 3

Set the iron on the hottest setting. Allow the iron to get hot. Firmly press the iron onto the back of the A4 sticker paper, sandwiching it between the copper clad and the iron. Pressing hard without moving the iron, hold the iron perfectly still for one full minute. Do not move the iron at all during this minute, and push hard, really hard!.Then,rub for 5 minutes and remove the adhesive paper slowly to ensure the right brass mounts on the PCB board.

Step 4

Soak the PCB circuit in the container with acid ferric chloride for a few minutes and make sure there is no copper detached from the circuit. After that, it ready to be installed PCB circuit electronic components. At Table 1 below is component list for etching PCB circuit.