This is a LED lighting project that will go into a high power rocket shaped like saucer. Because this is a high power rocket, it must be launched at a certain distance from spectators for safety reasons. The launch pad will be at least 200-300 feet from spectators and rocket may go as far as 1000 feet from the ground. Flashing lights are easier to see than non-flashing lights. Lights flashing in a pattern are even easier to see from a distance and this is why I'm doing a LED matrix.
I'm currently in the preliminary planning stage. Things to think about for this project:
1. Lights will be on for a maximum 1 to 1.5 hours.
2. The power supply will be a lithium polymer pack outputting a maximum of 16.8V.
3. Matrix will probably be 16 columns x 8 rows. (this may change)
4. Lights need to be bright enough to be seen from a distance.
5. Saucers use aerobrake recovery rather than parachute recovery, so the whole circuit needs to be light.
6. Would like flashing pattern to be changeable via a pushbutton.
7. A voltage cut-off circuit will be needed to prevent over discharging the batteries.
I'm posting my project here so that I can get some help with it. The circuit I'm thinking of using is described here: http://www.instructables.com/id/LED-matrix-using-shift-registers/step1/Parts/
The time the lights will be on may actually be around 30-45 minutes, but I put down 1-1.5 hours as the outside estimate. There are so many LED's out there that I don't know which ones to pick. If any of you have ideas, I'm open to suggestions. I would think a high viewing angle and high brightness coupled with lowish current and voltage would be best.
Also, I'm not familiar with the HEF4794B and MIC2981/2982 chips. I could use a tutorial on how they work.
Here are some pictures of my saucer fleet and the big pink one lifting off on a K185 during a daylight flight. Also posting a picture of the circuit I'm thinking of using. If you think another circuit would be more suitable, please let me know.
Your help is appreciated,
Mike
I'm currently in the preliminary planning stage. Things to think about for this project:
1. Lights will be on for a maximum 1 to 1.5 hours.
2. The power supply will be a lithium polymer pack outputting a maximum of 16.8V.
3. Matrix will probably be 16 columns x 8 rows. (this may change)
4. Lights need to be bright enough to be seen from a distance.
5. Saucers use aerobrake recovery rather than parachute recovery, so the whole circuit needs to be light.
6. Would like flashing pattern to be changeable via a pushbutton.
7. A voltage cut-off circuit will be needed to prevent over discharging the batteries.
I'm posting my project here so that I can get some help with it. The circuit I'm thinking of using is described here: http://www.instructables.com/id/LED-matrix-using-shift-registers/step1/Parts/
The time the lights will be on may actually be around 30-45 minutes, but I put down 1-1.5 hours as the outside estimate. There are so many LED's out there that I don't know which ones to pick. If any of you have ideas, I'm open to suggestions. I would think a high viewing angle and high brightness coupled with lowish current and voltage would be best.
Also, I'm not familiar with the HEF4794B and MIC2981/2982 chips. I could use a tutorial on how they work.
Here are some pictures of my saucer fleet and the big pink one lifting off on a K185 during a daylight flight. Also posting a picture of the circuit I'm thinking of using. If you think another circuit would be more suitable, please let me know.
Your help is appreciated,
Mike
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