06 soldering 101 (pptmin)

7/28/2019 06 Soldering 101 (PPTmin)

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Colorado Space Grant Consortium

Gateway To SpaceASEN / ASTR 2500

Class #06


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- Special guest to the class

- Soldering 101

- SUNDAY, SUNDAY, SUNDAY

AVR SMACKDOWN!!!

3:00 PM9:00 PM

- Need helpers for set up 1:30 PM

- Need helpers for tear down 9-10 PM- Not every will enjoy Sunday

- Next class 9/15/09, Guest Lecture

Julia Chu, Lockheed MartinSystems Engineering

Today:


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Colorado Space Grant Consortium

Soldering 101


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Soldering:
http://calspace.ucsd.edu/spacegrant/


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Caution:

- Solder ing is dangerous if not respected

- Be mindful of where you are and where

the solder ing iron is

- Eyes and l iquid solder

- Everyone is expected to solder

-If you get burned

-Stay together, dont work ahead


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Soldering

Circuit Board

Resistor

Solder Pads

Side View

Top View

PCBprinted circuit boards


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Prep Step 4: Tinning the iron

- Tin the tip of the soldering

iron by melting an inch or soof solder on the tip.

- The iron will now look shiny

on the tip.

- Then wipe any excess solder

on the golden sponge.

- Now place the iron back into

the holder. Tinning yoursoldering iron in this manner

will aid in future soldering.


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


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Soldering

Iron


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Move soldering iron until tip is

touching wire & solder pad


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Move solder to touch edge of tip.

Solder


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Hold until solder melts

on tip by wire

Solder


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Move solder back to touch wire only

Solder
http://calspace.ucsd.edu/spacegrant/http://calspace.ucsd.edu/spacegrant/


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Move solder in to form a

small pocket

Solder


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Move soldering iron tip up. Thiswill drag solder up with it.

Solder


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Look for

shinny fillets


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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


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TIPS:

- Use caution when clipping leads

to avoid flinging metal acrossthe room.

- All soldering must achieve a

good solder filet on the pad as

shown for circuit reliability.

- Also clip the leads in this

fashion.

- Bend resistors and diodes usingyour plastic tool as shown.

Example of a good solder filet

workmanship.

nasa.gov


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Top View

Tinned Copper Traces


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Top View

Soldered

Solder bridge shorting two traces - bad, bad, bad

But, can be fixed by reheating or using solder sucker


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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 takecaution when clipping leads. Wear your safety glasses at

ALL TIMES!


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Board Safety:


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Reading a Resistor:

The resistors in this workshop

have already been organized byvalue.

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, dont hesitate

to raise your hand and ask for

assistance.


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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 laymore flush with the board.

- Bending components to the correct bend

radius takes practice, but mastering the

technique will reap rewarding benefits!


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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 thetool that will yield the appropriate bend

radius.

- Use your thumb to bend the lead such that

the component and lead are orthogonal.

90


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Hands-on: Solder ing

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- 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


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Prep Step 1: Tool Layout

- Prepare tools for the

construction process.

- Put on your safety

glasses.


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Prep Step 2: Grounding

- Put on a static strap to remain

grounded. Also make sure the strapis tight across your wrist.

- This will protect any parts from

electro-static discharge (ESD) and its

harmful effects.


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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.


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Prep Step 3: Soldering Station


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Prep Step 4: Tinning the iron

- Tin the tip of the soldering

iron by melting an inch or soof solder on the tip.

- The iron will now look shiny

on the tip.

- Then wipe any excess solder

on the golden sponge.

- Now place the iron back into

the holder. Tinning yoursoldering iron in this manner

will aid in future soldering.


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


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Step 1: Distribute solder kits among team

You will have to share the soldering stations

Help each other learn the techniques


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Step 2: Layout kit (Socket not shown)


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-

Voltmeter is

very useful


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Voltmeter 101:

-

This is the set up typical ly used


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Voltmeter 101:

-

Use this

setting to

checkresistor

values


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Voltmeter 101:

-

Use this

setting to

check DCvoltage


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Voltmeter 101:

-

Use this

setting to

checkcontinuity


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Step 3: Look at board, find reference point


18Install Side


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Step 3: Look at board, find reference point


19Solder Side


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Step 4: Flip board over and solder 8 pin socket


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Step 5: Install 555

timer. Small circle

placed over pin hole

1


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Step 6: Flip board over and bend chip leads outDO NOT SOLDER AT THIS TIME


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Step 7: Install 120 k resistor (Brown, Red, Yellow)


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Step 8: Install 33 k resistor (Orange, Orange, Orange)


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Step 9: Verify resistors


120 k

Brown, Red, Yellow

33 k

Orange, Orange, Orange24


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Step 10: Flip board over Step 11: Solder Resistors


120 k

Brown, Red, Yellow

33 k

Orange, Orange, Orange25


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Step 12: Inspect solder joints and trim leads


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Step 13: Flipboard over

and install

capacitor

Gray strip

indicates

negative

lead


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- Lead


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Step 14: Verify capacitor is installed correctly


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- Lead


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Step 15: Flip over board and solder capacitor


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- Lead


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Step 16: Verify solder joint and clip leads


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Step 17: Install RED LED over 120 k ResistorNegative side is facing edge of board


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Negative Lead


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Step 18: Install GREEN or YELLOW LED over 33k Resistor. Negative side is facing edge of chip


Negative Lead

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Step 19: Flip board over and solder LED leads


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Step 20: Solder chip to board. Go slow


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Step 21: Verify solder joints and check for solder

bridges


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Step 23: Flip board over and solder battery leads


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Step 24: Attach test battery and watch what you made

NOTE: If it doesnt work, detach battery immediately

and have it inspected


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When completed, please wait for further instruction


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Questions?

06 soldering 101 (pptmin)

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