I have made an charge module with two TP4056 that charges two 18650 atteries. One TP4056 pr. cell.
All works fine, but i'm going to integrate the unit in a big lamp base and i want to add two charge leds wired from the board attached to the lamp.
I want the fully charge LED to light up when booth batteries are fully charged. and the charge LED to light up when power is connected.
Is there any simple way to do that?
Her is my unit:
I do not have any schematic for now.
"Is there any simple way to do that?"
No. Especially without a schematic of the TP4056 module. And from your somewhat cryptic description, you will also need an AND gate.
SteveMann:
"Is there any simple way to do that?"No. Especially without a schematic of the TP4056 module. And from your somewhat cryptic description, you will also need an AND gate.
Okay, thanks for answer 
But i'm think about running a wire from the leds that allready exist on the TP4056. Lets say i measure the voltage from booth fully charge leds when active, and attach a zener diode around that voltage. Will my led then light up when booth leds on the TP4056 boards is active?
Little hard to explain when my english is pretty bad, but all looks better in my head
Never mind. Voltage is the same....
But i assume booth batteries charges up equally, and when the first battery is fully charged i think the other is fully charged too. (parallel)
I think this is accurate enough for indication and then i can just unsolder the SMD leds on one TP4056 and solder som wires to the pads.
Sounds like a SN74LVC1G00 would solve the problem that you don’t appear to understand that you have.
Regards to what i wrote in post #4, i can't see any problem?
Works like a charm
