Hi Mags,

Very nice build, hats off! Thanks for showing the results.

Just out of curiosity, I was playing with some numbers in this link

http://www.circuits.dk/calculator_capacitor_discharge.htm where I entered your 35 V as max and your 15.2 V as minimum cap voltages, for ESR I used .03 Ohm (not critical for such calculations at microAmps)) for the 1000 uF capacitor. I found that entering about 22.2 uA as Imax current I got 1320.3 seconds for the resistor load cap discharge. (Your 22 minute long run time was 1320 seconds.)

If I choose the constant current discharge time to be 1320 seconds, then the Imax is 15 uA and the load impedance 2333.3 kOhm

This calculation indicates that your series coils (with the duty cycle defined by the reed on/off and the rpm) represent a 1582.99 kOhm load for the capacitor in the resistive discharge and a 2333.33 kOhm for the constant current discharge.

This load is the series inductive impedance of course and includes the 15.36 kOhm copper resistance, the total coils impedance being also increased by the duty cycle.

So your max current consumption if I am not mistaken much may have been between 15 to 22 uA, you may have a chance to check it, just for curiosity.

Looking forward to the collapsing field's energy capture, hopefully the dual reed contact will be speedy enough not to miss too much from the event under the switchover time. The energy stored in the series coils is given by formula .5*L*I

^{2} and it remains to be seen how much energy you find ( .5*C*U

^{2}) as going into the other phase cap from the process.

Gyula