Gateway To Space ASEN ASTR 2500 Class 08

Gateway To Space ASEN / ASTR 2500 Class #08 Colorado Space Grant Consortium T-51

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Today: - Announcements - Soldering 101 - Proposals DUE Friday, 9/16 at 12: 00 PM for Extra Credit OR - Proposals DUE Sunday, 9/18 at 1: 00 PM

Next Tuesday… Conceptual Design Review Slides DUE 7: 00 AM via email Prof. koehler@gmail. com Colorado Space Grant Consortium

Next Thursday… Guest Speaker – Jim Paradise Lockheed Martin Solar System Exploration Colorado Space Grant Consortium

Soldering 101 Colorado Space Grant Consortium

Soldering: 7

Caution: - Soldering is dangerous if not respected - Be mindful of where you are and where the soldering iron is - Eyes and liquid solder - Everyone is expected to solder - If you get burned… - Stay together, don’t work ahead

Caution: - Soldering is dangerous if not respected - Be mindful of where you are and where the soldering iron is - Eyes and liquid solder - Everyone is expected to solder - If you get burned… - Stay together, don’t work ahead

PCB – printed circuit boards Solder Pads Soldering Top View Side View Circuit Board Resistor 10

Prep Step 4: Tinning the iron (close-up) 11

Soldering Iron is only there for heat – to heat the board and part 12

Move soldering iron until tip is touching wire & solder pad Iron is only there for heat – to heat the board and part 13

Move solder to touch edge of tip. Solder Iron is only there for heat – to heat the board and part 14

Hold until solder melts on tip by wire Solder Iron is only there for heat – to heat the board and part 15

Move solder back to touch wire only Solder Iron is only there for heat – to heat the board and part 16

Move solder in to form a small pocket Solder Iron is only there for heat – to heat the board and part 17

Move soldering iron tip up. This will drag solder up with it. Solder Iron is only there for heat – to heat the board and part 18

Look for shinny fillets 19

Soldering Tips 1. Make sure tip is hot 2. Clean & tin tip 3. Keep tip clean by using wet sponge and cloth 4. Heat until the parts are hot enough to melt solder 5. Hold until solder flashes around pad 6. Do not put too much solder on 20

TIPS: - Use caution when clipping leads to avoid flinging metal across the room. - All soldering must achieve a good solder filet on the pad as shown for circuit reliability. workmanship. nasa. gov Example of a good solder filet - Also clip the leads in this fashion. - Bend resistors and diodes using your plastic tool as shown. 21

Tinned Copper Traces Top View 22

Soldered Top View Solder bridge shorting two traces - bad, bad But, can be fixed by reheating or using solder sucker 23

Today:

Board Safety: Caution: Many of the components used in this workshop are sensitive to electrostatic discharge (ESD). Please ensure that you are wearing your protective wrist strap at all times. There will be a warning slide when components are ESD and heat sensitive. Clipping leads can sometimes cause them to separate in a rapid manner that could cause injury. Please take caution when clipping leads. Wear your safety glasses at ALL TIMES! 25

Reading a Resistor: The resistors in this workshop have already been organized by value. In the event that your resistors get mixed, please refer to the chart at the left to classify your resistors, or use your multimeter. If you are unsure, don’t hesitate to raise your hand ask for assistance. 26

Pre-Bending: Pre-Bending 101: - Pre-bending is a technique that allows components to be easily inserted into a PCB. - Pre-bending also allows components to lay more flush with the board. - Bending components to the correct bend radius takes practice, but mastering the technique will reap rewarding benefits! 27

Pre-Bending: Pre-Bending 101: - Start with the bending and prodding tool in the position shown in the top picture. - Choose a location along the length of the tool that will yield the appropriate bend radius. 90° - Use your thumb to bend the lead such that the component and lead are orthogonal. 28

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Hands-on: Soldering 14

Hands-on: Soldering - Get into your teams - Each person on the team will solder their own circuit - You and your team will have 50 minutes - Let me know when you are done 15

Prep Step 1: Tool Layout - Prepare tools for the construction process. - Put on your safety glasses. 32

Prep Step 2: Grounding - Put on a static strap to remain grounded. Also make sure the strap is tight across your wrist. - This will protect any parts from electro-static discharge (ESD) and its harmful effects. 33

Prep Step 3: Soldering Station - Turn on the soldering iron - Set the temperature control on the soldering iron to a temperature less than 700 °F and greater than 450 °F. - As a general rule use a temperature in the range between 550 and 650 degrees Fahrenheit. 34

Prep Step 4: Tinning the iron - Tin the tip of the soldering iron by melting an inch or so of solder on the tip. - The iron will now look shiny on the tip. - Then wipe any excess solder on the wet sponge. - Now place the iron back into the holder. Tinning your soldering iron in this manner will aid in future soldering. 35

Prep Step 4: Tinning the iron (close-up) Tip of the iron is not the hottest part 36

Voltmeter is very useful - 37

Voltmeter 101: - This is the set up typically used 38

Voltmeter Use this 101: setting to check resistor values 39

Use Voltmeter this 101: setting to check DC voltage 40

Use Voltmeter this 101: setting to check continuity 41

Hands-on: Soldering Step 1: Distribute solder kits among team You will have to share the soldering stations Help each other learn the techniques 16

Hands-on: Soldering Step 2: Layout kit (Socket not shown) 17

Hands-on: Soldering Step 3: Look at board, find reference point Install Side 18

Hands-on: Soldering Step 3: Look at board, find reference point Solder Side 19

Hands-on: Soldering Step 4: Flip board over and solder 8 pin socket Step 5: Install 555 timer. Small circle placed over pin hole “ 1” 20

Hands-on: Soldering Step 6: Flip board over and bend chip leads out DO NOT SOLDER AT THIS TIME 21

Hands-on: Soldering Step 7: Install 120 kΩ resistor (Brown, Red, Yellow) 22

Hands-on: Soldering Step 8: Install 33 kΩ resistor (Orange, Orange) 23

Hands-on: Soldering Step 9: Verify resistors 120 kΩ Brown, Red, Yellow 33 kΩ Orange, Orange 24

Hands-on: Soldering Step 10: Flip board over 120 kΩ Brown, Red, Yellow Step 11: Solder Resistors 33 kΩ Orange, Orange 25

Hands-on: Soldering Step 12: Inspect solder joints and trim leads 26

Hands-on: Soldering Step 13: Flip board over and install capacitor Gray strip indicates “negative” lead “-” Lead 27

Hands-on: Soldering Step 14: Verify capacitor is installed correctly “-” Lead 28

Hands-on: Soldering Step 15: Flip over board and solder capacitor “-” Lead 29

Hands-on: Soldering Step 16: Verify solder joint and clip leads 30

Hands-on: Soldering Step 17: Install RED LED over 120 kΩ Resistor Negative side is facing edge of board Negative Lead 31

Hands-on: Soldering Step 18: Install GREEN or YELLOW LED over 33 kΩ Resistor. Negative side is facing edge of chip Negative Lead 32

Hands-on: Soldering Step 19: Flip board over and solder LED leads 33

Hands-on: Soldering Step 20: Solder chip to board. Go slow Step 21: Verify solder joints and check for solder bridges 34

Hands-on: Soldering Step 22: Install 9 V battery clip to board 35

Hands-on: Soldering Step 23: Flip board over and solder battery leads 36

Hands-on: Soldering Step 24: Attach test battery and watch what you made NOTE: If it doesn’t work, detach battery immediately and have it inspected 40

Hands-on: Soldering When completed, please wait for further instruction 38

Heaters ASEN / ASTR 2500 Colorado Space Grant Consortium

Environments at 30 km: - You need to do something to keep your systems warm - Colorado history has shown payloads (batteries) begin to fail below -5°C - Hand warmers don’t work well without air (O 2) - You will use an active heater 66

Environments at 30 km: • Balloon. Sats can do real science at 100, 000 feet • Discoveries can be made • Atmospheric studies can be done • Engineering challenges are extreme • Enough unknowns to catch the mind of students 67

Hands-on: Heater Circuit - Dry ice test results have been excellent 68

Hands-on: Heater Circuit Kit includes: 3 1 3 3 1 1 1 9 Volt batteries (for flight only) Perf Board Ceramic Resistors (4 Ω @ 5 W) 9 V connectors White wire Blue wire Red wire Black wire Switch Female connector with red and black wire 69

Hands-on: Heater Circuit Set out kit 70

Hands-on: Heater Circuit Layout Resistors on Perf Board 71

Hands-on: Heater Circuit Layout Resistors on Perf Board Front Back 72

Hands-on: Heater Circuit Fold over the leads from two of the blocks and solder them together 73

Hands-on: Heater Circuit Snip the leads that you just soldered together 74

Hands-on: Heater Circuit Fold over the opposite two leads and solder so that all of the blocks are connected in parallel then clip the ends of the leads 75

Hands-on: Heater Circuit Solder resistors in series using leads of resistors 4Ω 4Ω 4Ω 76

Hands-on: Heater Circuit Twist all the Red wires from the 9 V connector together and solder them to the single BLUE wire in your kit 77

Hands-on: Heater Circuit Twist all the Black wires from the 9 V connector together and solder them to the single black wire from the female connector 78

Hands-on: Heater Circuit Check continuity for all “-” and “+” terminals to each other 79

Hands-on: Heater Circuit Check continuity for all “+” terminals of the battery with the end of the single BLUE wire Check continuity for all “-” terminals of the battery with the end of the single BLACK wire 80

Hands-on: Heater Circuit Check continuity for all “-” terminals of the battery with the BLACK wire on the connector 81

Hands-on: Heater Circuit Put electrical tape on solder joints 82

Hands-on: Heater Circuit Solder the single BLUE wire from 9 V connector to one end of the resistor string and the RED wire from the female connector to the other end of the resistor string 4Ω 4Ω 4Ω 83

Hands-on: Heater Circuit Connect the Switch (Black to Black, Red to Red) 84

Hands-on: Heater Circuit Final Product 85

Hands-on: Heater Circuit Attach 3 flight batteries and turn switch on. Your heater will get extremely hot with in 1 to 2 minutes. If it takes longer, please let me know. 86

Hands-on: Heater Circuit Turn switch off, disconnect the switch from the heater, leave batteries connected 87

Questions? Colorado Space Grant Consortium 88