Originally Posted by
Fxdr
Thanks raleighcopter,
I used xiao.ino script to upload, the screen IS ok and shows servo thrown from 1000 to 2000 and displays temp and pressure, solenoid pulses
I'm not sure of components qualité but checked resistor and various MOSFETs which has some dispersion in values with multimeter despite from the sale batch. I Can hear a little frequency change in the solenoid but not enough Dynamic ti drive it really. I will check the wiring, changé the MOSFET and build a totally New setup to bé 100% sure
Thanks
That should not be possible, because the frequncy is constant. The sound CAN "change a bit" because what the driver does, is change the duty cycle, so the shape of the blockwave changes, but frequency should be constant. Audibly the functioning of the driver can NOT be confirmed.
The function CAN be confirmed by softly blowing into the tubing connected to the solenoid, while moving the throttle (linear curve from -100 to +100 set), you should notice a linear "resistance".
Alternative, set up a high and low container with liquid (fuel is best for reason of contamination, but in case nothing else availlable, water can do provided you blow the solenoid dry properly) and let the fluid syphon through the solenoid.
Moving the throttle should give THIS visual:
Notice how at "full open" as well as at "full closed" (at the end of the video) the sound very suddenly dissapears, but in the intermediate stage, there is barely any noticable change in the noise.
Also notice that when the solenoid is full open (no noise) the appearance of both the outflow stream, as well as the surface of the liquid in the bucket as by magic turn smooth, while during the intermediate phase there is significant disturbance in the outflow. This is an important phenomenon, that is responsible for a much better carburation, and a much cleaner running engine.