Hi
I am using a LIPO battery when fully charged it is 4.2V and I would like to create a circuit to light an LED when the battery voltage drops below 3.5V therefor warning the user.
Space is not abundant and therefore the circuit needs to be small and simple. Is there an easy way to do this as there is not even enough room for a PCB. I have read about using op amps to achieve this but I think they would be hard and fiddly to wire without a PCB.
If someone could help with this idea or has some pointers I would be greatful.
Thanks in advance
JPU
I am using a LIPO battery when fully charged it is 4.2V and I would like to create a circuit to light an LED when the battery voltage drops below 3.5V therefor warning the user.
Space is not abundant and therefore the circuit needs to be small and simple. Is there an easy way to do this as there is not even enough room for a PCB. I have read about using op amps to achieve this but I think they would be hard and fiddly to wire without a PCB.
If someone could help with this idea or has some pointers I would be greatful.
Thanks in advance
JPU