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2012-2013 - Assembling the Rocketometer

A project log for Rocketometer

Flight-proven Do-it-yourself Spacecraft

kwan3217kwan3217 04/05/2017 at 05:150 Comments

This one is from memory - I don't have any log of the actual construction. I did my usual thing, I had a solder stencil made for both sides of the board, just as I do for all of my boards. I carefully used the stencil to apply the solder paste, then carefully used tweezers to place each part on one side of the board. Then, into the toaster oven for five minutes and twenty seconds.

Next, solder paste on the other side. This is more difficult, because the side with components already on it is not flat any more. Part goes back in the oven, this time being careful such that the toaster oven grill does not touch any of the parts on the bottom side.

OSHPark makes three copies of each board that you order. The first board that I made was a failure, but I don't remember exactly why. I could use the standard LPC2148 bootstrap to talk to the controller, but either I couldn't program it or I couldn't get the sensors to work.

The second board worked fine -- this is the one that was ultimately launched into space.

I don't remember if I ever did make the third board. I seem to recall that I did, but that it worked even less well than the first board, like I couldn't even talk to the bootloader.

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