degray

My Feedback: (15)

I would like to use a brushless motor to power a model airplane that operates with a single-channel radio. Since the ESC would not be controlled, or armed, using the conventional throttle channel, there would be a need to arm and start the motor, and set the run time. I’m thinking of trying to design a circuit using the multi-purpose versatile 555 IC as the brain. I have used this IC in the past to generate the 1.0 to 2.0 m sec pulses to operate servos without a RX, and as a timer, but not the two features in the same circuit.
Depending on the ESC used, the circuit would have to start, when powered up, at pulse above 1.0 m sec and then drop down to around ~1 m sec, simulating the throttle starting at something above idle and then being reduced to idle. Then a pulse simulating full throttle (~2.0 m sec) or lower, depending on what power setting is desired, would be required before the plane is launched. If possible, it would be nice to have a timer in the circuit that would reduce the pulse back to the idle value so that the flight time could be set. If not, then the use of the ESC’s low-voltage cutoff would have to be utilized in conjunction with doing only a particle charge on the LiPo pack. This type of radio flew many years back using a Cox .049 glow engine and I would like to try it as an electric. Any thoughts or suggestions from you electronic experts? Thanks, Don.

DaveFlynn

You should use a PIC16F628A it would be a one day programming project. You could have a button to start and some dip switches to set the time.

ron_van_sommeren

This maybe? Intended for control-line brushless:
http://www.pek.nu/pekproj/proj/el/sc/

Prettig weekend Ron

degray

My Feedback: (15)

Thanks for the info. Don