User`s manual

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Before you try flying your Eggtimer, we recommend that you play around with the programming
screens on your workbench, until you are comfortable with it. You can’t hurt anything, and if
you totally mess up the memory you can always do a Master Reset to clear out all of your
experimental values.
To get to the Eggtimer menu screen, be sure that the power on the Eggtimer is OFF. Connect the
GND, RX, and TX connectors of the USB-serial cable to your Eggtimer, being careful to match
them up to the terminals so marked, then plug the USB end into a USB port on your computer.
Launch your terminal emulator program, configure the serial port for 19,200 baud, and connect
to the serial port. Power up your Eggtimer, and you will see this screen. You will also hear a
beep-beep sound to let you know that you’re in programming mode. When you do, hit the Enter
key a few times, this will let the Eggtimer know that you have a terminal connected and you’re
not ready to start a flight. Note: Be sure to hit Enter within 30 seconds of the beep-beeps, or it
will go into flight mode and you’ll have to reset it again to get to the programming screen.
Eggtimer Build_1.45 Flight Settings
T:23.50
A 100 LDA <50-500 by 50> P:97804.00
B 10 Burn/Coast Samp/sec: <4,5,8,10,15,20,25,33> A:975.39
100 Interval (ms) Main:0
C 2 Descent Samples/sec <1,2,4,5,10> CHB:0
500 Interval (ms) Batt:3.12
D 0 Main Enable <0-Off, 1-IGN, 2-Servo CCW, 3-Servo CW>
E 300 Main Altitude <100-2000 by 50, 0 @ Apogee>
F 1 Main ON-Time <1-9,0-Cont.>
G 0 CHB Enable <0-Off, 1-IGN, 2-Servo CCW, 3-Servo CW, 4-Airstart>
H 1 CHB ON-Time <1-9,0-Cont.>
I 1 Burn Timer <1-20>
J 0 Airstart Delay <0-9>
K 0 Telemetry
O Comments:
Options: Esc, A-O, ?
Options are selected by hitting the letter in front of the value (A-O), then using the + and – keys to
toggle the values up and down. The Esc key (usually in the upper left corner of your keyboard) exits
the screen and saves the flight settings, you will hear a long beep that confirms the save and then the
Eggtimer will halt (both lights will blink continuously). The ? key allows you to download saved
flight data (more on that later). Finally, there are a few “hidden” keys for special functions, such as
erasing all the flight memory and setting the flight settings to defaults, these are covered in the
Appendix.
Note that if you do not hit ANY keys or press the button down to select a pre-programmed flight
profile, the Eggtimer assumes that you don’t have a PC connected and you are ready to start a flight.
The beep-beep that tells you that you are in programming mode last for 30 seconds, then the
Eggtimer begins the flight sequence. For this reason, if you ARE programming it you should hit
Enter a few times to let it know that you have a terminal connection; once you do, it will terminate
the flight sequence and save your settings and halt after you are done programming.