Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

Simple deep discharge protection for battery operated sensors?

Maschler last edited by

Hello everybody,

I have a few mobile battery powered Ardruinos to measure the temperature. These are powered by 3 AA batteries. But always one of the three batteries is deeply discharged (0V!). To avoid this in the future, I wanted to ask if someone knows a simple circuit that prevents this? If it is possible, this circuit should not require much power.

Hope I am here in the right area of the forum
Reply Quote 1
1 Reply Last reply

1
Posts

439
Views

Suggested Topics

Over the air updates
General Discussion • • ToSa

87

1
Votes

87
Posts

50410
Views

I would really like to get OTA working here as it's freezing outside and I have to go there to update the software in the greenhouse control system. So please, can we have a 'how to' step-by-step guide to OTA? Please? S.
Sensors and more
Hardware • • Robert Leverett

1

0
Votes

1
Posts

15
Views

No one has replied
Best VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

3

1
Votes

3
Posts

30
Views

@eiten I haven't yet made any progress on finding a good VOC sensor, but along the way I did find out something interesting regarding CO2: namely, if you sleep with your bedroom door closed at night, then the odds are good that the CO2 levels rise to surprisingly high and unhealthy levels. The better CO2 sensors are factory calibrated and never again need recalibration for the life of the sensor (usually around 10 years or so), because they are used in HVAC systems to control fresh air intake to guarantee indoor air quality. As a for instance, here is one such CO2 sensor: https://www.digikey.com/en/products/detail/senseair/006-0-0008/15790694 At around $50 for just the sensor element itself, it's not exactly cheap, but then again, I'd say it's worth it, because who wants to be burdened by remembering to calibrate their CO2 sensors? Ideally, I'd like to find a sensitive VOC sensor that also will never require calibration. Nearly all, and maybe all, of the off-the-shelf IAQ montoring stuff that you might buy for, say, $300 or less seems to require periodic calibration. For that reason, this might be one of those occasions where build is rather than buy.
"Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design"
Hardware • • wrendral

10

0
Votes

10
Posts

42
Views

@wrendral said in "Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design": I will go with a Li-Po Battery type: 304048 3.7V 1200mAh Might work, but maybe the internal protection will trigger with the high current peaks. I'd suggest you plan a 0 Ohm, (2512/THT) resistor as R2 and then replace it with a 100Ohm/1Watt if the protection triggers.
Sleep mode for bmp280
Hardware • • fishermans

7

4
Votes

7
Posts

3281
Views

Just wanted to say thanks for this, it is still relevant and useful six years later !
Which one should i choose? PIR or microwave sensor
Hardware • • h01

8

0
Votes

8
Posts

71
Views

Supposedly PIR doesn't work through glass (e.g. if looking for motion through a window), whereas I presume a microwave sensor might still work.

Simple deep discharge protection for battery operated sensors?

Suggested Topics

Over the air updates
General Discussion • • ToSa

Sensors and more
Hardware • • Robert Leverett

Best VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

"Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design"
Hardware • • wrendral

Sleep mode for bmp280
Hardware • • fishermans

Which one should i choose? PIR or microwave sensor
Hardware • • h01

55
Online

11.4k
Users

11.1k
Topics

112.6k
Posts

Simple deep discharge protection for battery operated sensors?

Suggested Topics

Over the air updates General Discussion • • ToSa

Sensors and more Hardware • • Robert Leverett

Best VOC sensor for detecting a wide range of VOC's? Hardware • • NeverDie

"Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design" Hardware • • wrendral

Sleep mode for bmp280 Hardware • • fishermans

Which one should i choose? PIR or microwave sensor Hardware • • h01

55Online

11.4kUsers

11.1kTopics

112.6kPosts

Over the air updates
General Discussion • • ToSa

Sensors and more
Hardware • • Robert Leverett

Best VOC sensor for detecting a wide range of VOC's?
Hardware • • NeverDie

"Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design"
Hardware • • wrendral

Sleep mode for bmp280
Hardware • • fishermans

Which one should i choose? PIR or microwave sensor
Hardware • • h01

55
Online

11.4k
Users

11.1k
Topics

112.6k
Posts