1 student hands on training i (2009) additional avr modifications for balloonsat flight additional...

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Student Hands On Training I (2009)

Additional AVR Modifications

For BalloonSat Flight

Additional AVR Modifications

For BalloonSat Flight

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- There are two additional modifications we need to do your team’s AVR board

1. Heater Circuit Integration

2. Camera Circuit Integration

Both of these modifications will allow the AVR board to activate the heater and camera

Additional Modifications:

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Student Hands On Training I (2009)

Heater CircuitHeater Circuit

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- Your team will have 45 minutes to build an active heater circuit and integrate it to your AVR board

- Instructions are in your handbook

Hands-on: Heater Circuit

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Student Hands On Training I (2009)

Environments @ 30 km

Environments @ 30 km

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• How high do commercial jet fly?

• How high is the ozone layer?

• What are the layers of the atmosphere?

~10 km

~20 to 50 km

Environments at 30 km:

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• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Environments at 30 km:

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Capt. Joe W. Kittinger jumps from a balloon at 102,800 feet

Forgot to mention, he exceeded the speed of sound with his body

Environments at 30 km:

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Temperature varies in all directions as you climb through the different layers of the atmosphere

Why?

Solar Radiation (UV, IR)- Ozone Absorbs- Surface Heats- Convection

Environments at 30 km:

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- Temperature can dip to -80°C

- Biggest killer of past missions

- Easy, repeatable science

Environments at 30 km:

Burst (30 km)

TropopauseColdest

Launch

Landing

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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 (O2)

- You will use an active heater

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• BalloonSats 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

Environments at 30 km:

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Hands-on: Heater Circuit

- Dry ice test results have been excellent

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Hands-on: Heater Circuit

Kit includes:

3 9 Volt batteries (for flight only)1 Perf Board3 Ceramic Resistors (4 Ω @ 5W)3 9 V connectors1 White wire1 Blue wire1 Red wire1 Black wire1 IRL3302PbF MOSFET

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Hands-on: Heater Circuit

Set out kit (Switch not used)

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Hands-on: Heater Circuit

Layout Resistors on Perf Board

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Hands-on: Heater Circuit

Solder resistors in series using leads of resistors

4Ω

4Ω

4Ω

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Hands-on: Heater Circuit

Twist all the Red wires from the 9V connector together and solder them to the single red wire in your kit

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Hands-on: Heater Circuit

Twist all the Black wires from the 9V connector together and solder them to the single black wire

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Hands-on: Heater Circuit

Check continuity for all “-” and “+” terminals to each other

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Hands-on: Heater Circuit

Check continuity for all “+” terminals of the battery with the end of the single RED wire

Check continuity for all “-” terminals of the battery with the end of the single BLACK wire

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Hands-on: Heater Circuit

Put electrical tape on solder joints

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Hands-on: Heater Circuit

Solder the single RED wire from 9V connector to one end of the resistor string and the WHITE wire to the other end of the resistor string

4Ω

4Ω

4Ω

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Hands-on: Heater Circuit

Locate the IRL3302PbF MOSFET

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Hands-on: Heater Circuit

Solder the IRL3302PbF MOSFET to the AVR board as shown. Top pin should be at Column 15, Row 6.

Do not trim the leads

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Hands-on: Heater Circuit

Solder the IRL3302PbF MOSFET to the AVR board as shown. Top pin should be at Column 15, Row 6.

Do not trim the leads.

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Hands-on: Heater Circuit

Solder the IRL3302PbF MOSFET to the AVR board as shown. Top pin should be at Column 15, Row 6.

Do not trim the leads.

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Hands-on: Heater Circuit

Solder the other end of the WHITE wire to middle pin of the power MOSFET

Should be at Column 17, Row 7

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Hands-on: Heater Circuit

Create at solder bridge with middle pin of the MOSFET and end of the WHITE wire at Column 17, Row 7

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Hands-on: Heater Circuit

Solder the BLUE wire to the Column 15, Row 4

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Hands-on: Heater Circuit

Create at solder bridge with top pin of the MOSFET and end of the BLUE wire at Column 15, Row 4

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Hands-on: Heater Circuit

Solder the other end of the BLUE wire to the Row D, Pin 4.

Trim wire to minimum length

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Hands-on: Heater Circuit

Solder the other end of the BLUE wire to the Row D, Pin 4.

Watch out for solder bridges with other connections on the D block

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Hands-on: Heater Circuit

Solder the single BLACK wire from the batteries to the bottom pin of the MOSFET at GND on Column 16

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Hands-on: Heater Circuit

Create a solder bridge with the bottom pin of the MOSFET. DO NOT BRIDGE TO THE 3.3 HOLE.

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Hands-on: Heater Circuit

Attach 3 flight batteries and set assembly aside.

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Student Hands On Training I (2009)

Camera Integration

Camera Integration

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Hands-on: Camera Integration

Your camera has been modified so that it can be activated by shorting two wires together

We will change the camera’s firmware later to allow it to autonomously take pictures once activated

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Hands-on: Camera Integration

Your camera has a two wires coming out of the camera

The connector will allow you to easily integrate the camera unlike the heater which will be a pain

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Hands-on: Camera Integration

Those two wires are connected to a connector which is connected to a MOSFET (similar to the heater MOSFET)

Connected to the MOSFET are two wires, BLUE and BLACK

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Hands-on: Camera Integration

Solder the BLUE wire to PORT D, Pin 5

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Hands-on: Camera Integration

Solder the BLACK wire to GRD

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- Take your camera out of the box

Hands-on: Camera Integration

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- Insert the batteries

Hands-on: Camera Integration

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- Disconnect the connector between the camera and the MOSFET and turn on camera by shorting the two pins together

Hands-on: Camera Integration

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- Set the date and time

- Power off the camera by shorting the two wires together again

Hands-on: Camera Integration

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- Reconnect the camera to the MOSFET

- Be sure that RED goes to RED and BLACK to BLACK

Hands-on: Camera Integration

- Set everything aside and get ready for the POWER ON SYSTEMS TEST (POST)

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Student Hands On Training I (2009)

Questions?Questions?