New video!

It’s finally ready! Hydrogen balloons, fireworks and FPV, What more can you ask for in a video?

This has been by far the hardest video that I’ve made so far. So many things that went wrong or simply didn’t work. But I love a challenge. Minus degrees and snow didn’t put me of, those balloons had to be popped.

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This is the remote bit-switch I used to remote ignite the roman candles attached to the tricopter.

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Pretty simple. An Attiny25 and some FETS.

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This was my ignition system. A 12ohm 1/4W resistor and a match-head. When connected to 12V the resistor draws 1A which means that it has to deal with 12W of heat (I^2*R=1*1*12). The resistor is rated for 0.25W (1/4W) and thus heats up so much that it ignites the match-head. Be sure to choose the correct value on the resistor if you plan on trying this out for your self. A to large value and it won’t get hot enough and a to small value and the resistor wire inside will burn off like a fuse and break the circuit without generating the heat needed.

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Ready to be ignited.

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I also built this remote firing system.

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It’s nothing more than a couple of buttons and relays. It’s designed to be safe and reliable. First you need to arm the unit and then you need a two hand grip to fire either outputs.

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Time to pop some balloons.

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Snow is one thing there are ample of here in Sweden.

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This is the FPV defense sentry. It packs two 100 rocket packs and is equipped with smoke dispersing fan.

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Ready for battle.

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It’s always best to end with a bang.

I hope you enjoyed the video. It took 18 hours to edit, days to plan and I nearly lost both my feet to frostbite. But it was so worth it.

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