Powering with LiPo a mini pro without regulator
-
Neither. Those will boost it till 5v. You need something like this.
-
Neither. Those will boost it till 5v. You need something like this.
@Vladut-Grecu said:
Neither. Those will boost it till 5v. You need something like this.
But that one wouldn't be enough to feed the 5V that the MQ-2 gas sensor requires, would it?
-
@Vladut-Grecu said:
But 220uA are neglectable aswell. (For me at least)
Sorry, but the 220uA is drawn continously. Since most of my (and many others) battery applications have long sleep durations, the sleep mode power consumption is the first priority. Second is probably limiting the radio usage (meaning you can do things with just the arduino).
@m26872 said:
Sorry, but the 220uA is drawn continously. Since most of my (and many others) battery applications have long sleep durations, the sleep mode power consumption is the first priority. Second is probably limiting the radio usage (meaning you can do things with just the arduino).
My take on low power measurement.
I have not gotten around to actually build it yet but I hope to do some measurements in my "lab" this spring. -
Oh.. for the gas sensor they are ok. Last one (green) seems a little bit more polished. The presence of the usb port is not important, you can solder it off. The usb is the output. Check the picture again. It's your choice.
-
Oh.. for the gas sensor they are ok. Last one (green) seems a little bit more polished. The presence of the usb port is not important, you can solder it off. The usb is the output. Check the picture again. It's your choice.
@Vladut-Grecu said:
Oh.. for the gas sensor they are ok. Last one (green) seems a little bit more polished. The presence of the usb port is not important, you can solder it off. The usb is the output. Check the picture again. It's your choice.
Yes, you're right, it's the output. I didn't take a close look to the image. The green one seems more polished as you say. I'll try with those.
@Anticimex said:
@m26872 said:
Sorry, but the 220uA is drawn continously. Since most of my (and many others) battery applications have long sleep durations, the sleep mode power consumption is the first priority. Second is probably limiting the radio usage (meaning you can do things with just the arduino).
My take on low power measurement.
I have not gotten around to actually build it yet but I hope to do some measurements in my "lab" this spring.That's a very interesting project. In the thread some of you say that if VBatt = Vcc (no regulator like I'd like to have) then using the divider to measure the charge is non-sense and it's way better to use the internal functionality, Am I wrong?
-
@Vladut-Grecu said:
Oh.. for the gas sensor they are ok. Last one (green) seems a little bit more polished. The presence of the usb port is not important, you can solder it off. The usb is the output. Check the picture again. It's your choice.
Yes, you're right, it's the output. I didn't take a close look to the image. The green one seems more polished as you say. I'll try with those.
@Anticimex said:
@m26872 said:
Sorry, but the 220uA is drawn continously. Since most of my (and many others) battery applications have long sleep durations, the sleep mode power consumption is the first priority. Second is probably limiting the radio usage (meaning you can do things with just the arduino).
My take on low power measurement.
I have not gotten around to actually build it yet but I hope to do some measurements in my "lab" this spring.That's a very interesting project. In the thread some of you say that if VBatt = Vcc (no regulator like I'd like to have) then using the divider to measure the charge is non-sense and it's way better to use the internal functionality, Am I wrong?
@Viper_Scull
I have not looked into how internal measurement is done. So I don't know what constraints that type of measurement has. But for external measurement using a voltage divider allows the measurement point to be biased with respect to the ADC reference voltage and my proposal limits the standby current draw of the voltage divider.
But if no regulator is done internal measuring is provable better, how that now can be achieved. I am guessing by using vcc as reference to the ADC. -
Right. Thanks. That was something along the line with what I expected. I think it is an adequate option as long as you run the Arduino directly off the battery (without regulation). But with regulation it won't work.
-
@Vladut-Grecu said:
Oh.. for the gas sensor they are ok. Last one (green) seems a little bit more polished. The presence of the usb port is not important, you can solder it off. The usb is the output. Check the picture again. It's your choice.
Yes, you're right, it's the output. I didn't take a close look to the image. The green one seems more polished as you say. I'll try with those.
@Anticimex said:
@m26872 said:
Sorry, but the 220uA is drawn continously. Since most of my (and many others) battery applications have long sleep durations, the sleep mode power consumption is the first priority. Second is probably limiting the radio usage (meaning you can do things with just the arduino).
My take on low power measurement.
I have not gotten around to actually build it yet but I hope to do some measurements in my "lab" this spring.That's a very interesting project. In the thread some of you say that if VBatt = Vcc (no regulator like I'd like to have) then using the divider to measure the charge is non-sense and it's way better to use the internal functionality, Am I wrong?
@Viper_Scull said:
"...way better to use the internal functionality, Am I wrong?"
Yes, "way better" given that it is a real low-power application. Saving 1uA and 2 resistors isn't always that important.
-
@Viper_Scull said:
"...way better to use the internal functionality, Am I wrong?"
Yes, "way better" given that it is a real low-power application. Saving 1uA and 2 resistors isn't always that important.
