Hi all,
This is my first post on the rocketry forum and so please let me know if I posted this in the wrong place and I will repost it where it is more appropriate. I am working with a small team of newbies when it comes to High-Power Rocketry and we are trying to figure out how to setup the electronics for the upper avionics in a 2-stage rocket (L motors, ~10k AGL). The upper avionics will need to control 2nd stage separation, 2nd stage ignition, payload deployment, drogue deployment (at apogee with payload but in different compartments), and main deployment.
Here is what we have:
Arduino Mega
Xbee Pro S2B
Venus GPS with SMA connector /w Ceramic Antennae
x2 Raven Altimeters (one with bad sensors but good terminals)
1 Missile Works Altimeter
9-axis IMU from Sparkfun - LSM9DS0
Voltage Converter board 3.3V to 5V
Some transistors
Logic and method we are thinking of employing for 2nd stage separation:
1. Using one of the Raven's to detect launch then delaying separation based on a delay timed to burn time of the booster.
Logic and method we are thinking of employing for 2nd stage ignition:
1.Delay .5 seconds after separation charge
2.Check to make sure booster has separated. We are thinking of doing this via a continuity check but not sure how to employ that method. Suggestions would be helpful or suggest another method.
3. Use an Arduino and an Inertial Measuring Unit (IMU) to determine whether the rocket is more than 10 degrees off the Z-axis. The arduino will be connected to a both the continuity check and a wire that leads to a transistor (gate) which opens and closes the 4th channel signal coming from the raven for 2nd stage ignition. If either the continuity check or the Z-axis logic does not pass, the gate on the transistor will be closed. If they both pass, the gate will be open and the signal from the Raven will pass through and ignite the 2nd stage. We are very sure how to program and connect all of this logic and I guess importantly if this is a good way to do it. Any explanations, suggestions, or thoughts would be helpful!
Payload, Drogue, and Main deployment we have figured out and redundant with a Raven and another altimeter.
Thanks for your help everyone!
This is my first post on the rocketry forum and so please let me know if I posted this in the wrong place and I will repost it where it is more appropriate. I am working with a small team of newbies when it comes to High-Power Rocketry and we are trying to figure out how to setup the electronics for the upper avionics in a 2-stage rocket (L motors, ~10k AGL). The upper avionics will need to control 2nd stage separation, 2nd stage ignition, payload deployment, drogue deployment (at apogee with payload but in different compartments), and main deployment.
Here is what we have:
Arduino Mega
Xbee Pro S2B
Venus GPS with SMA connector /w Ceramic Antennae
x2 Raven Altimeters (one with bad sensors but good terminals)
1 Missile Works Altimeter
9-axis IMU from Sparkfun - LSM9DS0
Voltage Converter board 3.3V to 5V
Some transistors
Logic and method we are thinking of employing for 2nd stage separation:
1. Using one of the Raven's to detect launch then delaying separation based on a delay timed to burn time of the booster.
Logic and method we are thinking of employing for 2nd stage ignition:
1.Delay .5 seconds after separation charge
2.Check to make sure booster has separated. We are thinking of doing this via a continuity check but not sure how to employ that method. Suggestions would be helpful or suggest another method.
3. Use an Arduino and an Inertial Measuring Unit (IMU) to determine whether the rocket is more than 10 degrees off the Z-axis. The arduino will be connected to a both the continuity check and a wire that leads to a transistor (gate) which opens and closes the 4th channel signal coming from the raven for 2nd stage ignition. If either the continuity check or the Z-axis logic does not pass, the gate on the transistor will be closed. If they both pass, the gate will be open and the signal from the Raven will pass through and ignite the 2nd stage. We are very sure how to program and connect all of this logic and I guess importantly if this is a good way to do it. Any explanations, suggestions, or thoughts would be helpful!
Payload, Drogue, and Main deployment we have figured out and redundant with a Raven and another altimeter.
Thanks for your help everyone!