Sharing ideas on how to make a more efficent motor using Flyback (MODERATED)

[verpies]

I use this diagram for the first 555:
http://www.electroschematics.com/5834/pulse-generator-with-555/

This is not a classical 555 astable configuration, so it is not surprising to me anymore that you are obtaining less than 50% duty cycle at its output.

[verpies]

the yellow zero is underneath the green zero marker

So C2 is not discharged all the way down to 0V.
Would deleting R4 or increasing L2 (or decreasing R2) help to get it all the way down to 0V ?

[itsu]

I do not have R4 in (just C3/C4), and L2 is adjustable by a ferrite core which is now in max (max inductance, guestimate at 2.5mH) which indeed
lowered C2 towards zero as it is now, so probably increasing L2 even more could do it, so need to look for a higher inductance l2.

In the mean time i could try decreasing R2 to see what effect that has.

Itsu

[itsu]

decreasing R2 from 10 to 3.3 Ohm made the C2 cap pratically go to zero, see below screenshot where i have ch1 (yellow) set at max visible amplitude.

Itsu

[gotoluc]

Looks good itsu

Thanks for sharing all your tests

Luc