HI I'm making this Arduino project and I'm at the point that I'm starting to design a PCB. But the problem I'm running in to it how to power everything. I would like to have two options, 1 power with a USB cord, 2 power with a battery. When use the USB I'm stepping up the voltage to 9 volts so the …

So when the battery is charging the USB port the Arduino would be using the power form the USB but only from the Battery. If that's the case it would work and be a good option for me. I would just be powered from a wall outlet charger. Is that what your saying? Id like the battery to be a option S…

[image] bradley_waldner_mg: So when the battery is charging the USB port the Arduino would be using the power from the USB but only from the Battery. If that's the case it would work and be a good option for me. I would just be powered from a wall outlet charger. Is that what your saying? The…

Ok i see where your going. So when the bord is plugged into the external USB port according to the drawing you have, it will charge the battery and also power the Arduino. The battery will be disconnected from the Arduino. So when the USB is disconnected the Arduino will run off the Battery's power.…

I would build my own circuit right onto my PCB

[image] bradley_waldner_mg: But on the drawing what i don't understand is why you have the USB 5v connected before the boost converter, i don't understand why you would boost 5 volts. Unless i don't understand the drawing. Well after it goes through the schottky diode, it's no longer quite 5V…

Ok that makes sense having the boost converter not lag behind would be better. I didn't think that there would be that much voltage drop at the Schottky diode. That drawing design seams to be a very simple one and one that i can use. But i wont be sue the modules you have on the drawing i make them…

I think you will find that the datasheets for the TP4056 charger and the MT3608 boost converter will have application schematics that will work well for you. Also the DW01 protection IC if you need that. But you have to be careful about designing your own boost converter, particularly the placemen…

[image] ShermanP: But you have to be careful about designing your own boost converter, particularly the placement of the inductor. I can vouch for that. At one place I worked there was a team dedicated to power supplies. In it there were engineers dedicated to designing and laying out switch …

Just a friendly reminder that the chip I recommended back in post #8, the RT9361A, is both a boost converter and a 5V regulator, meaning that you will always get a clean 5V output, regardless of the fact that your input voltage is changing due to the battery draining. If you were to connect the bat…

I was wandering how that worked with varying input voltages. Adding a on off switch might actually be a good idea, no use in it running 24/7. I designed a boost converter i i have the PCB but i haven't tested it yet. So if that one works ill be a more confident is designing a different one. The vid…

Trying to find the best way to power project

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Trying to find the best way to power project

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