Originally posted by InTheField
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thanks for taking the time to post your test results. One thing you mentioned above that is not correct!... like you I have observe exactly as you have observed, so please let me know where I said the above so I can edit it out.
You are correct about the DC Resistance of some fan motor coils being lower than 40 Ohms. I have a 120mm that is only 4.6 Ohms. However it is not giving me good results, so I did not mention it. I would consider re-coilling it but first I would like to know if anyone knows the ideal DC Resistance range. I must say that I am disappointed with the lack of participation or comments in this tread.
To all, I am bolding DC Resistance because some are using the term Impedance and from what I know and understand that is not the correct term to use if you are using your Ohm meter to measure your coils resistance. However I am very open to learning , so if anyone knows better please explain to let me know.
To all, again please share your findings if you have results in order to help everyone with better results.
Luc
Checked after a day and both of those batteries were at ~14.45V. They both discharged again, but as before, one is a little higher (~6.3V) and the other is up from a ~3V to nearly 6V... after discharging down from the initial 14V.
) I've unscientifically confirmed this in the last few days by putting one of my setups into a "fastest fan/pulse speed" state instead of a "slowest fan/pulse speed" state. What I saw was that even though the charge load batteries were getting some charge, the neon still lit up! (Purely hypothetical on my part, but I believe that) there must have been a backup in electrons from the pulses being too fast and even though there is a large diode (value as recommended) to prevent it, there must have been feedback spikes across the transistor. Which leads me to believe that the reverse spike reflection was large enough in voltage potential swing to break down the reverse voltage of the diode in order for the neon to light... now that's some serious voltage potential from a little 12V driven fan setup.
As far as getting OU charging... I'm still messing with this. Sometimes I feel like I'm getting that and other times I definitely know I'm not. I believe that it hinges on a number of factors. 1) the "tuning" of the setup, 2) the conditioning of the batteries, 3) and something that I haven't seen mentioned, the "conditioning" of the setup... don't ask me how to "condition the setup". For me, it just seems to be happening over time.
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