• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Rechargeable LED light bulbs

Not open for further replies.


New Member
We supply rechargeable LED light bulbs that have built-in batteries. The purpose is to solve power blackouts, that is, when there is power failure you can still have power by turning on the switch.

We are now facing new challenges with existing circuits which have polarity issues or have motorized device such as a fan on the same circuit with the rechargeable LED bulbs.

Because of these issues when you turn off the switch, the light bulbs do not turn off.

We need help with design of LED driver or electronic that can address this problem. Can anyone help?


Well-Known Member
Most Helpful Member
How does the existing circuit work?

Edit, to detect the switch is closed would require detecting another load on the circuit. Your fan is acting as the other load all the time.
Not open for further replies.

EE World Online Articles