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Step 5Solder the circuit (diesel or exhaust sensor)
This is the trickiest part of the project. All connections must be very solid or they will fracture from the movements of the balloon. I recommend lot's of heat shrink or electric tape around each joint.
Solder the pic socket (not the pic itself to allow easier programming). Leave about 6 inch wires between the LED and the picaxe. Solder the picaxe, sensor and battery close together.
Sensor Pins
1 - picaxe pin 4 with a 100Kohm resistor across ground (for diesel)
OR
3 - picaxe pin 4 with a 10Kohm resistor across ground (for exhaust)
4 - ground (this could be the battery ground or the picaxe ground)
3 - VCC (this could be the picaxe VCC or the battery VCC)
LED Pins
Green - picaxe 1
Red - picaxe 2
Solder the pic socket (not the pic itself to allow easier programming). Leave about 6 inch wires between the LED and the picaxe. Solder the picaxe, sensor and battery close together.
Sensor Pins
1 - picaxe pin 4 with a 100Kohm resistor across ground (for diesel)
OR
3 - picaxe pin 4 with a 10Kohm resistor across ground (for exhaust)
4 - ground (this could be the battery ground or the picaxe ground)
3 - VCC (this could be the picaxe VCC or the battery VCC)
LED Pins
Green - picaxe 1
Red - picaxe 2
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