Eggtimer Rocketry Flight Computer Manuale Utente Scaricare il pdf (Pagina 10)

check to make sure that you have this inserted correctly! Turn over the board and solder the

leads to the board. Trim the leads flush.

___ Mount the 47 uF electrolytic capacitor

Insert the 47 uF electrolytic capacitor into the holes on the board, making sure that the lead

with the “- - - -“ markings next to it is inserted OPPOSITE the hole marked “+”. Double-

check to make sure that you have this inserted correctly! Turn over the board and solder the

leads to the board. Trim the leads flush.

Mounting the Hope RF Radio Module

You will be surface-mounting the Hope RF radio module to the board, the pads are relatively

large and spaced relatively far apart, so if you didn’t have any trouble with the voltage

regulator you won’t have any problems with the RF module either.

__ With a piece of paper masking tape about 2” long, tape the board to your work surface

so it won’t move. Don’t cover the area where the RF module is going to be mounted!

__ Cut another piece of masking tape about 2” long and about ½” wide.

__ Carefully position the Hope RF module on the board so that its pads line up in the

center of the top pads, the “half-moon” cutouts on the module should be centered on the pads

on the board. With the masking tape that you just cut, lay it across the top to hold it in place on

the board. Make sure that it’s properly positioned, there are some small holes on the pads on

the module, they should line up with similar holes on the board. You may find that using a few

pieces of cut-off resistor leads helps, put one in each corner to line up the holes before you tape

the module down.

It is important that the masking tape covers as much of the RF module as possible, up to the

exposed pads. This is to prevent any errant solder splatter from getting onto the RF module.

There are some VERY tiny exposed parts on the RF module, if you get the tiniest bit of errant

solder on the module chances are excellent that it will be ruined

__ Solder the TOP RIGHT pad of the Hope RF module to the board. Make sure that the

board is properly positioned after you solder this joint; it it moves, heat up the solder joint and

move the board slightly so that it is properly positioned. Wait 30 seconds after soldering

before continuing.

__ Stick a round toothpick in the hole in the middle of the solder pad marked ANT. This

is to prevent any solder from getting into the hole. Solder the BOTTOM LEFT pad of the

Hope RF module to the board, this is the one next to the ANT terminal. Wait 30 seconds,

then remove the toothpick.

__ Solder the remaining pads to the board, waiting 30 seconds between pads to prevent the

module from overheating. If you used cut-off resistor leads to line up the holes, be sure to

remove them before soldering the pads.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16 17

Nessun commento

Eggtimer Rocketry Flight Computer Manuale Utente Pagina 10