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Need Help With Project Answered

I am working on a high rocketry project. I want to made a launch detector. My idea is to use a magnet reed switch (PN# ORD2212) and a electromagnet. Which I will turn off about 2 seconds before launch, to give a 2 seconds base line. I will use magnet powder (around the switch) so when the electromagnet is on it will hold in place, then drop off when the power is remove, opening the switch signing the fight computer to start flight operations. The unit is 20mm Wide/15mm Length/35mm Height (screen shot attached).

My question is what magnet power should I use? It has to be as light as possible. Also how do I calculate the electromagnet (appx 12V)?

Thanks for the help

Richard

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Toga_Dan

7 months ago

why magnetic powder? the reed switch and magnet act as a relay with no powder.

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Rocket NutToga_Dan

Answer 7 months ago

The powder is use so when the electromagnet is on it will stick to side
of the bird. Keeping the flight computer in stand by mode. This allow
time to clear the range, also since it's in stand by mode the on board
battery will last longer. Then when I press the launch button the
electromagnet is turned off an falls off the bird, at the same the reed
switch (opens) telling the fight computer to start logging operations.
The pad electronics will delay the firing current for 2 seconds so the
computer will log a 2 second base line.

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None
Rocket Nut

7 months ago

The powder is use so when the electromagnet is on it will stick to side of the bird. Keeping the flight computer in stand by mode. This allow time to clear the range, also since it's in stand by mode the on board battery will last longer. Then when I press the launch button the electromagnet is turned off an falls off the bird, at the same the reed switch (opens) telling the fight computer to start logging operations. The pad electronics will delay the firing current for 2 seconds so the computer will log a 2 second base line.