1. LSU 09/12/2013Electronics - SkeeterSat1 Building SkeeterSat Inventory Components  Identify components Use the parts list and assembly manual  Tape to card (except for ESD sensitive items) Label with Designator, Type and Value e.g. C3, capacitor, 0.1uF  Locate component on schematic diagram

2. LSU 09/12/2013Electronics - SkeeterSat2 Building SkeeterSat Assemble components on PCB in accordance with Instructions in the SkeeterSat manual  Locate component position and orientation on PCB  Prepare leads and place on PCB (POLARITY!)  Solder  Inspect When finished, do a final visual inspection and proceed to testing. Follow instructions in the manual.

3. LSU 09/12/2013Electronics - SkeeterSat3 Component Preparation Axial Lead Components Most will require their leads to be bent to conform to the spacing of the hole in the circuit board. Radial Lead Components A well-designed board will have the holes spaced to match radial lead parts. If adjustment must be made it must be done very carefully. Use a lead bending tool if possible.

4. LSU 09/12/2013Electronics - SkeeterSat4 Component Placement Observe the proper orientation of polarized components. Note banded end of diodes, and notched end of IC chips and sockets. Components should be as close to the board as possible without stressing the leads. Orient components so that their value markings can be easily read after installation. Have resistor color bands all reading in the same direction.

5. LSU 09/12/2013Electronics - SkeeterSat5 Inspection Inspect Twice, Solder Once Be sure that the correctly valued component has been inserted into the correct location, with the proper orientation, BEFORE soldering any leads. After soldering one lead it’s good practice to inspect again before soldering the rest of the leads.

6. LSU 09/12/2013Electronics - SkeeterSat6 Inspection After all leads are soldered, inspect again, looking for: “Dry” or “cold” solder joints Poor adhesion of solder to pads or leads Solder bridges across traces or pads Unsoldered leads 90 % of all failures are related to soldering problems

7. LSU 09/12/2013Electronics - SkeeterSat7 In Case of Emergency… So, after all your best efforts and careful inspection, you made a mistake…..

8. LSU 09/12/2013Electronics - SkeeterSat8 In Case of Emergency… So, after all your best efforts and careful inspection, you made a mistake….. Don’t Panic… Remain Calm… Components can be removed from a circuit board.

9. LSU 09/12/2013Electronics - SkeeterSat9 In Case of Emergency… Use a “solder sucker” or “solder wick” to remove solder from the hole. It’s usually wiser to sacrifice the component by cutting it’s leads off, then removing the leads one at a time. This will avoid damaging the traces on the circuit board, which are very difficult to repair

10. LSU 09/12/2013Electronics - SkeeterSat10 Activity E4 Assemble and test your SkeeterSat.