FINAL HARD AND SOFTWARE

Final Hardware 

Tested working final hardware as handed in

As this was final day for working software and hardware this as seen is the working prototype of the overall project all required functions of the hardware and software completed. This last session involved ironing out the last few glitches of the software i e adding a shape recognition function and display, these had been worked on over the intervening time put perfected at the last minute.

Software console with shape recognition

The software console with shape recognition tested against the hardware. The FSR reading made to loop and a visual bar added as to its value not its progress, the adc samples once every two seconds when activated and a button added to deactivate it.



The switch matrix was put in order to represent the hardware switchboard, the progress bar for the matrix reading is split into 16 divisions to represent each switch as sampled to completion in the software, A second array is utilized for the shape identity module.either putting a one or zero into the array and then "if" statements to register the shapes.

This as above is the final hand in and completed project, As you can see this project has more potential for development a larger matrix of switches and a full set of FSR's would give greater definition to the software and better shape recognition.

FINAL ASSEMBLY

COMPLETED HARDWARE

Final construction on base plate

This is the constructed hardware and ribbon cables for further testing and software integration a little bit of tidying up needed.
To this point the ADC apart from continuity has not been tested. The Force sensitive resistor to be added and software completion for testing this.

MUX BOARD

MUX BOARD

The mux or multiplexer is an integrated circuit designed to take various digital information sources and put them to a single output line.

On the mux board there are two '74151' mux i c's, These mux chips are 8 bit each allowing 16 switches.

HARDWARE ASSEMBLY

MUX BOARD

   The  I C sockets and 15 pin D-type connector being placed on the board.  

 The placing of the I C sockets and 15 pin D-type connectors. All other connectors where added to the board and all soldered securely into place making sure of good electrical connectivity.

See testing results in final report of connectivity before placement of integrated circuits and functionality testing of the boards. 

PCB routing of ADC and MUX board's.

PCB DESIGNS

ADC  routed design PCB with copper pour and mitre,

MUX board routed but not mitred or copper poured.








Last weeks work consisted of finishing the PCB designs and soldering the components to the switch board
the switch board was tested for continuity of the tracks the component then added and a test of the switches to 18 pin connector and resistors was further established.a copy of the test table for switchboard is provided in report.

SWITCHBOARD

SWITCHBOARD assembled and continuity tested ready for further assembly.

SWITCHBOARD PCB

This is the switchboard PCB after drilling, ready for continuity testing.

SWITCH BOARD PRODUCTION

SWITCH BOARD

Due to technical difficulties this week cadstar was not available so production of the switch board was undertaken.

The cue for the tanks!

In this process the photoresist board is exposed to uv light while covered with the artwork of the PCB.

After that the board is developed, etched,and tinned in the chemical tanks to leave the PCB tracks and pads on the board.


The pads are then punched and drilled to accept components. 








The board will be continuity tested before components are added.

Schematics

Over the last few lab sessions the schematic for the ADC and the MUX board have been completed and the transfer to PCB has started.

 The MUX schematic under construction.

week one

Schematics