Joule Thief

[Pirate88179]

Jeanna:

I think my set-up might be able to charge an AA rechargeable but, I would need to make some kind of voltage regulator to prevent the 2.7 volts of the B-cap from blowing up the 1.2 volt AA.

I don't think I know how to do that.  Actually, I am sure I don't know how to do that.  I could eliminate the B-cap but, usually the output from the EER is usually still too high for a 1.2 volt bat. and, I don't think the AA would respond to the spikes like the B-cap does.

Bill

[dasimpson]

cool just found out buy mersuing with my dmm i have 4 45k pots

[resonanceman]

Jeanna:

I think my set-up might be able to charge an AA rechargeable but, I would need to make some kind of voltage regulator to prevent the 2.7 volts of the B-cap from blowing up the 1.2 volt AA.

I don't think I know how to do that.  Actually, I am sure I don't know how to do that.  I could eliminate the B-cap but, usually the output from the EER is usually still too high for a 1.2 volt bat. and, I don't think the AA would respond to the spikes like the B-cap does.

Bill

Bill

That is an easy one

Just  charge 2 AAs in series


gary

[Pirate88179]

Gary:

Duh!  Now why didn't I think of that? ??? ?  I feel like an idiot. 

Would the 2.7 volts in the B-cap be too much for 2 x 1.2 volts (2.4 volts) in the rechargeables?  If that is OK then this is a brilliant, and simple, solution.

Thank you,

Bill

[dasimpson]

no that would be spot on to charge 2 batteys you need a couple of volr more when charging the question is will the ma of the earth battery be high enogth to trickle charge and pass the leakage rate also dont have cap fully carged when you connect the battery connect the battery to the cap then connect the earth battery terminals should limit damge to the batterys from the fast discharge of the caps