This is the MARSA4 flight computer user manual, which introduces the function and usage of MARSA4 flight computer
This manual explains the safety requirements and hardware description of the MARSA4 experimental altimeter, including battery requirements, ematch specifications, and mounting instructions. It also details the barometric sensor’s sensitivity to sunlight and the proper handling of pyrotechnic outputs.
The guide walks the user through power‑up sequencing, programming the flight computer, diagnostic menus, and using the MARSA Connect software to download flight data and update firmware. It includes step‑by‑step procedures for connecting to a computer, flashing new firmware, and troubleshooting continuity tests.
| Battery type | Single 9 V alkaline or NiMH rechargeable |
|---|---|
| Maximum battery voltage | 11 V (must not exceed 12 V) |
| Ematch no‑fire current | > 0.2 A |
| Ematch all‑fire current | < 2 A |
Use a single 9 V alkaline or NiMH rechargeable battery, keeping the voltage below 11 V and never above 12 V.
Mount the altimeter securely with #4 hardware using the four PCB corner holes (1.95" × 3.75" centers) so the long direction is parallel to the rocket’s axis.