Joule Thief

[freepow]

@ All

I am making a Solar Panel...  3 volts @ 7.2 Amps, and I will be charging a supercap with it and as soon as it is charged up, then I'll switch the solar charger off,  Do I need a Diode ?

I bought   2x Diodes rated at  6 Amps each , will these work ?
Do I hook then up in parallel ?

How much voltage drop will there be from the  3 volt Solar panel with the 2x Diodes ?

Or if I change the Solar panel to 2.5v output, can I quickly charge cap and soon as cap reaches 2.5v then switch Solar charger off, will I need a Diode ?

[crowclaw]

@ All

I am making a Solar Panel...  3 volts @ 7.2 Amps, and I will be charging a supercap with it and as soon as it is charged up, then I'll switch the solar charger off,  Do I need a Diode ?

I bought   2x Diodes rated at  6 Amps each , will these work ?
Do I hook then up in parallel ?

How much voltage drop will there be from the  3 volt Solar panel with the 2x Diodes ?

Or if I change the Solar panel to 2.5v output, can I quickly charge cap and soon as cap reaches 2.5v then switch Solar charger off, will I need a Diode ?

Hi FreePow,
A diode has a 'forward voltage drop' across it's junction, approx 0.7 volts for a silicon diode. A Schottky diode is slightly less at approx 0.2 volts so deduct the drop from you solar panel voltage ( 3V - 0.7V = 2.3v) Diodes are similar to a one way switch to a DC voltage. When the anode is positive with respect to the cathode the diode conducts and is said to be forward biased. However when the cathose is positive with respect to the anode the diode will not conduct, hence as light falls onto your solar panel a current will flow through the diode and charge your cap. During darkness the panel does not give an output of course so the diode prevents back feeding the charged cap into the panel. Connect both diodes in parallel the forward voltage drop will be slightly lower. Schottky diodes are a better choice with such a low solar output.

[Pirate88179]

Osiris:

As you can see, I removed another post of yours for name calling, inaccurate information and just general meanness.  If you feel the need to continue this I will ask that you be placed on read only once again.

This is NOT happening.

Bill

[osiris]

Post removed by moderator.

IST, osiris, or whatever.....I have sent a request to Admin to place you on read only.  No one has ripped of your work.  Your bad attitude and name calling has no place here.

Bill

[MrMag]

im sorry you and gadget feel the need to rip off kids ...

that is so sad it proves how foolish you all are ..

see revenge is a meal best eaten COLD

0

im sorry you feel the need to rip off others work and call it your own ...

that is so sad it proves how foolish you are ..

see revenge is a meal best eaten COLD

(I was hoping you wouldn't be back to your old self so soon)