Using Dead Batteries to Test for Dead Batteries
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- čas přidán 7. 08. 2024
- Got a dead battery? That's a matter of perspective! Instead of recycling coin cell batteries when their time is due, Mat shows you how to put them to good use, as he demonstrates a secret feature of the Raspberry Pi Pico and what sets it apart from other microcontrollers. He'll use dead batteries to check for other dead batteries, so you never have to doubt a battery again. In the end, you'll have a nifty box to keep batteries organized, tested, and ready to use!
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#0:00 Welcome to element14 presents
#0:21 Overview
#1:33 Dead Batteries
#3:16 Putting It Together
#7:44 Programming
#10:46 Final Product!
#11:31 Give your Feedback
#raspberrypi #raspberrypipico #raspberrypiprojects #raspberrypi3 #raspberrypi4 #batterysave #batterysaver #batterytester - Věda a technologie
I would eliminate the diode for polarity protection by using an edge contact and a face contact for the battery. in the event you put the battery in the slot in the wrong orientation both contacts would be touching the same pole of the battery and thus no voltage across the contacts. this would eliminate having to account for a diode drop which could vary with temperature and time.
That's actually not a bad idea. I would worry that the thinner batteries could still short given the fact you could slot them at angle.
Granted I haven't tested the box in more robust temperatures but despite the diode the readings were more accurate than I initially anticipated hence sticking with this at the end.
Welcome to the gang, straight out of the gates with a cool project!
Thank you david :)
There are Voltmeter modules for ~ $1 Aliexpress that can work off the battery under test and work down to 2.5V - good enough to tell if a 3V coin cell is dead. Other modules can measure down to 0V if powered externally with ~5V.
Great idea / packaging, but I was hoping for more than just a voltmeter testing cells under no load.
I can see this project added into another project that I have. Great job 👍🏾. I love it. Thank you for the ideas and the code.
I believe Most battery testers put a small load on the battery being tested. That might give you more accurate results. The tester I have puts roughly a 5 ohm resistor across the battery.
It's my first video for Element14 and I hope you will enjoy the content! 🫣
It was very interesting!
@@AndyCPugh thank you :)
Thought I recognised you, great to see you here Mat! Already subbed for your Node Red videos
Good one
@@plapbandit thanks :) I guess that makes me recognizable now ☺️☺️
What a Cool Project, I have so many
Brilliant!
Cheers!
That's an amazing idea. I am not that much familiar with battery capacity testers. I would really appreciate it if you could clarify one concept. Based on my understanding, batteries have some regenerative capabilities due to the chemical properties of their contents. Sometimes it's not enough to just monitor the voltage of the battery. That's why, in many cases, I have seen people use a constant current load with it to measure the capacity. Does the diode with the series resistor perform the same task or is it just a voltage divider with reverse polarity protection? Thanks.
When load is applied to the battery the voltage can dip significantly. Once load is removed the battery "recovers" some of that drop.
Monitoring voltage of the battery gives you a good ballpark figure for single use batteries where cells are unlikely to abused by charging. Load testing would be more recommend for rechargeable battery.
You could apply small resistance to see how much voltage drops ... You'll have to modify the code provided in the description to account for a small voltage drop across the resistor.
What if…. The voltage is exactly 1.5 volt….. use
Hold it 5sec longer and I'm sure it will be 1.49V 🫣😂🤣