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        Help! TGY DP frequency amplitude and duty-cycle

#1 nsgil85 Oct 01, 2012 06:29 PM

TGY DP frequency amplitude and duty-cycle
 
I have 4x "TGY DP 3A 1S 1g Brushless Speed Controller" and 4x "HobbyKing AP-03 7000kv Brushless Micro Motor" for my mini quad copter.
I'm building controller from scratch and would like to know what is the frequency amplitude and duty-cycle(max/min) for this ESC to operate the motors.

Thanks
Gil

#2 desertstalker Oct 02, 2012 12:37 AM

The throttle signal to an ESC is a 1-2ms pulse 1ms being 0 throttle and 2ms being 100%. Typically this is repeated at ~50 Hz but it could be faster, no way to know if the ESC will support a faster rate though. This is not really PWM (though you can use a PWM system with a very short duty cycle and low frequency).

The ESC can likely be calibrated to match its idea of 0% and 100% with your controller.

#3 nsgil85 Oct 02, 2012 06:39 AM

about the amplitude can i use 3.3v?

#4 desertstalker Oct 02, 2012 07:52 PM

Quote:

Originally Posted by nsgil85 (Post 22890891)
about the amplitude can i use 3.3v?

5V is typical, but 3.3V might work as most ESCs are pretty tolerant of signal voltages. May be too low though.

The uC I used had the option of using pull-up resistors (so you had two states 0V and high Impedance) and was 5V tolerant so i used 5V when I was playing with uC controlled ESCs.


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