MODULE 6: Soldering SUMMER CHALLENGE Electrical Engineering: Smart Lighting Michael Rahaim, PhD Candidate Multimedia Communications Lab Boston University.

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Presentation transcript:

MODULE 6: Soldering SUMMER CHALLENGE Electrical Engineering: Smart Lighting Michael Rahaim, PhD Candidate Multimedia Communications Lab Boston University

Boston University Slideshow Title Goes Here Module 6: Soldering Overview  Recap – LED Drivers  Soldering Overview  Soldering VLC PCBs 2 07/13/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Recap – LED Drivers 3 07/14/2014

Boston University Slideshow Title Goes Here Module 6: Soldering Electrical Power 4 This is another one of those important equations… 07/09/2015

Boston University Slideshow Title Goes Here Module 6: Soldering VLC Transceiver  Components  2 - Sockets  1 – LM741 Op Amp  1 – LM393 Comparator 5  4 – Header Pins  7 – Resistors  1 – Photodiode  1 – White LED  1 – HB LED 07/13/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Soldering Overview  PCB: Printed Circuit Board  Thru-hole: Components with leads that go through the circuit board and get soldered on the other side.  Surface-mount: Components that are soldered on the same surface on which it is mounted.  Track/trace: The “wires” connecting components.  Pad: Exposed points where components are soldered.  Silkscreen: Print text on PCB 6 07/13/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Thru-Hole vs. Surface Mount  Surface Mount Advantages  Smaller size and more compact layout  Components can be placed on both sides of the board  Thru-Hole Advantages  Much easier to solder by hand  Easier to rework 7 07/13/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Schematics vs. Layout  Schematics are a symbolic representation of the circuit  Layout indicates the physical arrangement on the PCB 8 07/13/2015 Layout Schematic

Boston University Slideshow Title Goes Here Module 6: Soldering About Soldering  Process of joining metal items together by melting a filler metal, solder and contacting the items to be joined.  Requirements:  Heat source (Soldering Iron)  Low melting point metal (Solder)  Flux (Prevents oxidization)  Temperature  Typically set around 700°F 9 Temperature Controlled Solder Station 07/13/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Lab Instructions  Insert leads through the holes in the PCB  Turn board over and bend leads outward  Clean iron tip on a damp sponge  Tin the iron tip by applying solder, then wipe again 10 07/13/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Lab Instructions  Apply the iron such that it contacts the pad and lead  Apply solder to the joint, NOT the iron  The heated metal of the pad and lead should melt the solder  Use wire cutters to clip the excess lead.  Be cautious when clipping the lead!  Have a TA inspect the board for shorts 11 07/13/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Desoldering  Copper Solder Wick/Braid  For removing excess solder  Braided copper mesh “pulls” solder off the board  De-Solder Vacuum  Uses a vacuum action to pull solder from the board 12 07/13/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Presentation Topics  Team 1:TBD  Team 2:Resistors  Team 3:Arduino  Team 4:TBD  Team 6:TBD  Team 7:TBD  Team 8:Light Emitting Diodes (LEDs)  Team 9:Optical Links (LEDs – Photodiodes) 13 07/13/2015 NOTE: Teams of 2, 5-6 minute presentation. Teams of 3, 7-8 minute presentation.

Boston University Slideshow Title Goes Here Module 6: Soldering Experiment  Soldering Lab  When you finish:  Return to PHO 115  Work on Module 5 Activity I (Photodiode circuit) 14 07/08/2015

Boston University Slideshow Title Goes Here Module 6: Soldering Recap  What did you today? 15 07/13/2015