Hi Spirit team,

Here is my setup :

- microSpirit
- Spektrum SPM 4650 receiver ( SRXL2 )
- DX8 G2
- ESC : http://www.hawk-creation.com/index.php? ... ct_id=2401
BLHeli 14 manual https://github.com/4712/BLHeliSuite/blo ... ev14.x.pdf
ESC connected to AUX
- Lipo 1S - 950 mah

Issue : the ESC does not recognize the signal from the microSpirit

I have worked hard to know why it does not work ( many days ) and have tested many things :

- calibration : sure, it's not the problem ( I have tested throttle range in the spirit, in the ESC ( with BLHeli software ), change travel / subtrim in the TX etc... )
- ESC is working with this old receiver : https://hobbyking.com/fr_fr/receiver-rx ... opter.html ( have tested )
- microSpirit works my old ESC : http://www.hawk-creation.com/index.php? ... ct_id=6435

So, I took an oscilloscope to check the PWM between spirit and the 2 ESC : the voltage is around 1.8V for the ESC that does not work although it is around 3V for the other ESC.

I think the problem is the voltage ( I reproduced such a low voltage with an Arduino connected to the ESC and it does not work but it works with a higher voltage ) and not calibration.

After searching, I've seen a similar problem : https://electronics.stackexchange.com/q ... pwm-signal

I don't know why the spirit voltage drops : maybe not enough current ?

What can I do ?
Maybe a transistor : base on the signal from spirit and emitter on the +4.2V ( solution in the stackexchange thread )

But before doing that as I can damaged the spirit or the ESC, I would appreciate your advice !

Thanks

Hello,

normally the voltage of the microSpirit at all signals is 3.3V. If not, then the Spirit unit must be damaged to some extent.
There is internal voltage stabiliser which must produce 3.3V always. You can measure this voltage at SAT port.
Can you confirm it please?

Is there a chance you measured it not correctly?

You can also try to connect a servo at the AUX port.

_________________
Spirit System developer