Eggtimer Rocketry Flight Computer Bedienungsanleitung PDF herunterladen (Seite 7)

If you bought a Starter Set, you’re going to be assembling the Eggtimer TRS transmitter board

first, because you’ll need the transmitter to be operational before you can test the receiver

board. Both boards have signal status LEDs on their RF modules, so you can pretty much tell

if it’s working by the status of the lights; if the transmitter’s “TX” light is blinking and the

receiver’s “RX” light is blinking, then they’re talking to each other so they must both be

working.

A Note About Soldering the SMT Parts

This kit contains a lot of really small parts, the resistors and capacitors are all 0805-size SMT.

You WILL need to use some kind of lighted magnifier to build this kit… don’t even try it

without one, unless you have Superman’s eyes and really steady hands.

The general technique for mounting these parts is this:

• Tin ONE pad very lightly

• Hold the part in place with tweezers

• Heat up the lead over the tinned pad until the solder starts to melt

• Hold the iron for about 3 more seconds to allow the solder to flow around the part

• Remove the heat while continuing to hold the part in place

• After about 5 seconds, remove the tweezers

• Solder the other terminal to the board, using as little solder and heat as possible. If you put

too much heat on it, you will probably melt the other solder joint and the part will lift off the

board when you withdraw your iron.

• THE MOST IMPORTANT STEP… INSPECT THE PART AFTERWARDS WITH A

SMALL MAGNIFIER OR JEWELER’S LOUPE.

• If you have a solder bridge or the joint doesn’t look perfect, reheat it and do it over

There are some SMT components that are mounted UNDERNEATH the processor chip. You

are going to have one, and only one, shot at getting them right. Once you solder the processor

chip over them, if one of them has a solder bridge or didn’t get completely soldered, the only

fix is to cut all the leads on the processor to remove it, clean out all 28 holes, and email us to

get another processor. Neither one of us wants to see that happen, so take your time and make

sure that you get it right the first time.

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Eggtimer Rocketry Flight Computer Bedienungsanleitung Seite 7