kg4wsv:
Yes, an arduino can do that, although you'll need to add some transistors to switch the larger currents required for a typical e-match/igniter, and you'll need some sort of sensor (e.g. accelerometer) to detect events like launch, burnout of the previous stage, etc.An accelerometer based system is nice because different motors have different burn times. If you use a timer, the timer will have to be adjusted for each motor burn time.
-j
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that could be an option when the acelerometer measures a disminution in the force of the rocket apply a delay and then fire the charges that will separate the stage and ignite the upper stage and i could also use a gyro to mantain a stable fly and use small aleirons to correct the course (im also a RC plane builder) and i could achieve a less balistic flight ang get a higher apogee