Hello gents,
I want to build a portable battery powered variable power supply. Not sure what I'd use it for but, I think it'll be one of those things that when you have it you don't know how you didn't have it before.
So I got a laptop battery pack out of a smashed laptop. It has the standard lithium cells in it. My plan is to use a LM317 voltage regulator based power supply circuit, if anyone knows of a circuit that's more efficient than that one I'll take it. but if that is efficient then great. Efficiency is paramount in this project. Also is there a circuit that can regulate volts as well as amps? I was thinking that I could potentially help myself out by not directly wiring all the batteries together. Instead I could wire them all (4 of them) to their own transistor, probably a MOSFET. (Again if there's a better kind out there.) Then I could use an arduino to turn on and off cells, for example if I needed 2 volts, I could just use one battery, if I needed 12 I could use more. Additionally I could use different cells each time if I were using one cell a lot. So they all stay balanced. I'd also have undervoltage/overvoltage protection on the batteries as well as a proper lithium charging circuit. I don't know what circuits to use here, but I could probably find it on google in 5 seconds. Though the battery pack does have all of its own monitoring circuitry with it. But I'm feeling like it could be a pain to use.
Any suggestions are welcome.
I want to build a portable battery powered variable power supply. Not sure what I'd use it for but, I think it'll be one of those things that when you have it you don't know how you didn't have it before.
So I got a laptop battery pack out of a smashed laptop. It has the standard lithium cells in it. My plan is to use a LM317 voltage regulator based power supply circuit, if anyone knows of a circuit that's more efficient than that one I'll take it. but if that is efficient then great. Efficiency is paramount in this project. Also is there a circuit that can regulate volts as well as amps? I was thinking that I could potentially help myself out by not directly wiring all the batteries together. Instead I could wire them all (4 of them) to their own transistor, probably a MOSFET. (Again if there's a better kind out there.) Then I could use an arduino to turn on and off cells, for example if I needed 2 volts, I could just use one battery, if I needed 12 I could use more. Additionally I could use different cells each time if I were using one cell a lot. So they all stay balanced. I'd also have undervoltage/overvoltage protection on the batteries as well as a proper lithium charging circuit. I don't know what circuits to use here, but I could probably find it on google in 5 seconds. Though the battery pack does have all of its own monitoring circuitry with it. But I'm feeling like it could be a pain to use.
Any suggestions are welcome.