WELCOME TO MY WEEK 4

Electronics Production

Hi?..this was a very interesting week with Electronics Production as the topic...mainly creating circuit boards and attaching the components. It has been structured in cycle such that design and programming will follow in the suvsequent weeks to come.We are to design a FabISP programmer from scratch, lets see...

A FabISP is a in-system programmer for AVR microcontrollers, can be produced in a Fablab setup.It facilitates programming the microcontrollers on other boards you create.

Please for all the information and details click here >>> Electronics Production

Assignment

So this week the task was quite simple but not that simple if you follow what i`m saying...Several FabISP circuits were provided but you can make your own design..Personally I chose to work with David A Millis FabIsp board in terms of fabricating and making it work by myself...
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The outline was available for downloading, after which we are to mill the board using the fab modules and 1/32...to look something like ;
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Below are a labelled diagram together with the components offering maximum guide and illustration on what we were supposed to do:

Components

1 ATTiny 44 microcontroller
1 Capacitor 1uF
2 Capacitor 10 pF
2 Resistor 100 ohm
1 Resistor 499 ohm
1 Resistor 1K ohm
1 Resistor 10K
one 6 pin header

1 USB connector
2 jumpers - 0 ohm resistors
1 Cystal 20MHz
two Zener Diode 3.3 V
one usb mini cable
one ribbon cable
two 6 pin connectors

Alright before proceeding check out provided below are the links to the design files:

>>> Download original David Mellis` Fab ISP board

>>> Download My modified FabISP board traces.

>>> Download My modified FabISP board schematic created by Eagle.as per the assignment

>>> Download My modified FabISP board designed in Eagleas per the assignment
Ok here is what I did:
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So far I`ve only created the board I`m assembling the components for now..I used the fab modules to integrate with the Roland Modela so as to work with the PCB.
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All the components were provided immediately the board was ready for us to start the component mounting process. Since all the components were surface mount we had to observe extreme caution while soldering the minute parts.
Some of the components became quite a challenge due to poor alignment i.e Zener diode.
After several trials I managed to pull out quite a few boards...
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