I’ve been working on this little gift that I want to give to each of my sisters. It’s basically a strip of WS2812 LED “fairy” lights controlled via an Arduino Pro Mini. It’s got a couple buttons which allow the user to change the color patterns and such.
My question today regards powering this project.
The LED light strip can be easily disconnected from the black box which contains the Arduino Pro Mini, a small li-ion battery and a TP4056 charger. It will have a standard 1A 5V micro USB adapter to charge it. It also has a P-channel MOSFET and diode for load sharing to allow the battery to be safely charged while also powering the Arduino and lights (similar to what’s described here).
I’m envisioning it could be used in either of these two situations:
1.) With a fully-charged battery, this device could be placed somewhere far away from a power outlet and run solely on the battery until it’s depleted (5-6 hours). You would have to recharge the battery in the black box before using again (obviously).
2.) If the LED lights are to be used somewhere near an outlet, this device could be permanently plugged into the outlet and powered from that. In this situation, the TP4056 would keep the battery fully charged for long periods of time.
Here’s my question: is it safe to use this device in situation #2 for long periods of time, say multiple weeks or months? The li-ion battery would remain connected to the TP4056 and fully charged for quite a long time. Is this safe?
I once had a repurposed old iPhone that I used as a security webcam monitoring my house. After several months of being constantly on and connected to its charger, the internal iPhone battery expanded so much that it burst out of its casing.
I suspect I could build some circuitry with another MOSFET to periodically disconnect the TP4056 from the power source and run off the battery for short periods so it stays conditioned. Would this be useful and/or necessary?
My question today regards powering this project.
The LED light strip can be easily disconnected from the black box which contains the Arduino Pro Mini, a small li-ion battery and a TP4056 charger. It will have a standard 1A 5V micro USB adapter to charge it. It also has a P-channel MOSFET and diode for load sharing to allow the battery to be safely charged while also powering the Arduino and lights (similar to what’s described here).
I’m envisioning it could be used in either of these two situations:
1.) With a fully-charged battery, this device could be placed somewhere far away from a power outlet and run solely on the battery until it’s depleted (5-6 hours). You would have to recharge the battery in the black box before using again (obviously).
2.) If the LED lights are to be used somewhere near an outlet, this device could be permanently plugged into the outlet and powered from that. In this situation, the TP4056 would keep the battery fully charged for long periods of time.
Here’s my question: is it safe to use this device in situation #2 for long periods of time, say multiple weeks or months? The li-ion battery would remain connected to the TP4056 and fully charged for quite a long time. Is this safe?
I once had a repurposed old iPhone that I used as a security webcam monitoring my house. After several months of being constantly on and connected to its charger, the internal iPhone battery expanded so much that it burst out of its casing.
I suspect I could build some circuitry with another MOSFET to periodically disconnect the TP4056 from the power source and run off the battery for short periods so it stays conditioned. Would this be useful and/or necessary?