2/29/2024 0 Comments Joule thief definition![]() ![]() A transformer must be designed with the intended load in mind, then high efficiency can be approached. Once again, there is no one shoe that fits all. You see some attempts at this with newer ferrite E-E core configurations with extensions on the outer edges of the core structure. It's magnetic structure completely surrounds the spool. Visually a pot core is the E-E core rotated rotated and filled through it's axis of symmetry. They are difficult to manufacture, and break easily, generally more expensive than other types, the window area is not optimum. Properly designed they completely contain the magnetic and electrostatic field, minimize the DC resistance by having the windings efficiently on a spool. The most efficient magnetic structure that I know of is the pot core. I would welcome any input on this, then I can offer some optimized approaches once the problem is defined. Can the batteries be fresh or is the idea to scavenge remaining energy from nearly dead cells? If you don't need to design for a single nearly dead AA cell, and can put several in series or parallel, the topology will change again. Since different functions require different circuit topologies, we can properly design the optimum circuit once the goal is known.Ī) to drain the remaining energy from a single nearly dead AA cell and transfer that energy to a supercap?ī) to drain the remaining energy from a single nearly dead AA cell and light a bank of series connected LED's What type of LED's and how many Lumens are required.Ĭ) some other requirement or combination of the above. The engineering target seems to shift all over the place. Can someone state clearly in a simple Technical Requirement Specification exactly what function or functions they would like the Joule Thief or any such circuit to perform.
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