ESP8266 Community Forum

- Fri Apr 15, 2016 9:42 am #45532 You should take a look at 18650 lithum batteries. They are rechargeable, modules are available for proper charging and discharge.

Check out my temp sensor https://hackaday.io/project/8687-esp826 ... ure-sensor

Gary

- Fri Apr 15, 2016 9:44 am #45533 Thank You! Does that mean that really all 3 of the ones mentioned in your post would work if connected to

a 5V battery or a 3 x 1.5 AA batteries (as i think 2 x AA won't work)

I have no idea how to wire that up, is it straight Vin and Vot per the data sheet. No other capacitors or anything there.

Is there benefits to buck module over this possibly that it can handle higher voltages as I think the 7333 is only 4.5?

- Fri Apr 15, 2016 10:51 am #45539 There is not much advantage of using a buck converter connected on batteries, especially if it doesn't have low quiescent current.
About the HT7333, it's maximum input voltage is about 30V (not 4.5V), but of course, it is an LDO, so when the voltage drop is higher, the more heat is produced.

- Fri Apr 15, 2016 12:20 pm #45546

You should take a look at 18650 lithum batteries. They are rechargeable, modules are available for proper charging and discharge.

Check out my temp sensor https://hackaday.io/project/8687-esp826 ... ure-sensor

Thanks Gary. Your project looks great. I hadn't looked at those lithium batteries before. Should I assume one of those at 3.7 is likely better than 3 of the AA 1.5 V and using the module that Martin recommended?

BTW, where did you get that case?
BTW#2 - What did you mean by "proper charging and discharge" ? Is it not just put it in the sensor, when it runs out, charge it?
EDIT: Now I understand what you meant about the Li-Po's

But, given it's only 3.3V, I think I may just go with a Li-ON as they appear safe.
WOuld this work inside a battery case?
http://www.aliexpress.com/store/product ... 17744.html