We had Problems with Auto-Routing in eagle after circuit design, some of the connections were shorted in the final auto-routed layouts, so make sure to re-verify the PCB layout and connections visually with the circuit to avoid problems after PCB printing or assembly.

Also proble pads for connectivity and routing verification on PCB after PCB printing.

PCB printing in home can be easily done using simple and widely known chemical process using toner deposition / UV layout method to overlay traces onto PCB and etching the design using FERRIC-CHLORIDE solution.

The VIAS in the PCB layout might be too small for home / self PCB printing, so make sure to increase size of VIAS along with Pads for easy drilling of holes and making via connections.

The design can be used in 3 ways:

• Fully assembled test board, by permanently soldering everything directly onto PCB, Hence redices costs with no flexibility in expirimenting.
• Semi-Assembled test board (Shown in Images) , by permanently soldering only components essential for basic circuit operation, such as Power Supply Circuit, Filter capacitoes, Essential resistors etc, Hence enabling sime flexibility to change i/o components during expirimentation.
• Test Board: Board assembled fully with IC base, male and female berg connectors and screw type connectors, hence full flexibility to test and expiriment a particular circuit with various values of components and configuration, but this may compromise reliability as student/individual has to make all the connections in circuit and is no better than conducting the expiriment on breadboard.