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Building a Heater Circuit for a Near-Space Payload

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Presentation on theme: "Building a Heater Circuit for a Near-Space Payload"— Presentation transcript:

1 Building a Heater Circuit for a Near-Space Payload
AEM 1905: Spaceflight with Ballooning University of Minnesota

2 Heater circuit parts

3 Perfboard (AKA solderable breadboard)

4 5 Watt ceramic resistors

5 Rocker switch

6 9-volt battery snaps

7 Wire: two ~ 6 in and two ~ 12 in

8 Shrink-wrap (AKA heat-shrink tubing)

9 Wire mesh (AKA hardware cloth)

10 Strip the ends of all 4 segments of wire

11 Line up one short wire end with the
3 red ends from the 3 battery snaps

12 Twist the exposed metal wires together

13 Solder the twisted wires together to make
the electrical connection permanent

14 Cover the connection with shrink-wrap

15 Use heat gun to shrink the wrap

16 Repeat with black wires – finished product

17 Wrap one end of each long wire to the
2 tabs on the back of the rocker switch

18 Solder wires in place – may require turning
up the soldering iron temperature a bit

19 Cover solder joints with shrink-wrap

20 Completed rocker switch with wires

21 Place 3 resistors onto perfboard

22 Bend leads so that 3 resistors are in series

23 Solder leads together then clip excess

24 Connect switch, batteries, and resistors
in series; put on the shrink-wrap first.

25 Bend wires when making connections so
any strain is carried by wire, not by solder.

26 Slide down and shrink the wrap – here
is the completed heater circuitry

27 Cut and bend wire mesh into a cage

28 Cover resistors with wire cage to prevent
accidental contact with heating elements


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