Im relatively new to Arduino so I'm so sorry if i sound silly or stupid
I have a 3.7v lipo battery with a max 6A and i need to connect this to the Arduino Uno R3 and a 5v 2A device.
Firstly is it possible to have some kind of push button switch to switch the power from the arduino to the device? I have a rechargable circuit and a buck boost converter to output the 3.7V to the required 5V but I wasn't sure if I could just have two outputs connected and have a switch so when I need the Arduino to turn out the switch will be off, but when the switch is pushed it will power the device turning off the Arduino. The reason why I'm not having two batteries and to converters is because I need to keep the package small and the recharging circuit can only do one lipo cell charge.
I hope I was clear but if not, please ask for any more information you need to solve this
Thank you everyone for having the time to read this, hope I haven't wasted anyones time
Hi, your description is difficult to follow. Explaining complex ideas in clear language is not easy and takes a lot of practice. A diagram may help. It does not need to be an accurate circuit schematic at this stage. It does not have to be professionally produced. Just pencil on paper, captured on your smartphone.
I want to create a portable device and i have an adafruit lipo charger and it has one output but i want it to power two devices, one arduino uno and one 5v device,
Im sorry I haven't made it clear i will post what charger i have too
Thanks
yes I thought I would so would a DC-DC buck boost converter work? My issue is that I'm not sure how I would power two devices. I was thinking of a switch of some sort to switch between outputs but I do not know if I can do that or even a switch that can do that. So if not, maybe like a single input to dual output power source?
yes I thought I would so would a DC-DC buck boost converter work?
Sure that should work. Just make sure it's 5V out and that it can supply 2A or more.
I don't quite understand your switching requirements. Maybe two switches?
Or an SPDT "single-pole, double throw" switch will switch between two things. For example, if you wanted to switch between a red light bulb and a blue light bulb, a double pole switch will do that. Or, you could switch between a power supply and battery-power.
DPDT (double-pole, double-throw) toggle switches, slide switches, and relays are very common. Double-throw pushbutton switches can be found by they are not as common. (A double-pole switch is basically two switches built-into one that switch together. (Since DPDT switches are so common, you can get use a DPDT switch in place of a SPDT switch and simply leave 3 terminals un-connected.)
DPDT "center-off" switches are also very common.
Note that with 3.7V in and 5V @ 2A out, you'll be pulling almost 3 Amps from the battery. Switching power supplies/regulators are nearly 100% efficient, so power-in is approximately equal to power-out. In case you don't already know, power (Watts) is calculated as Voltage x Current.
So if i had the converter output 5v and can handle 2amps of current I could have a SPDT switch connected to the power out from the converter and then when the switch is pressed it can switch the power between the arduino and the other device?
Btw your information has been amazing thank you for your time
