All about Raspberry Pi 5 real time clock battery
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- เผยแพร่เมื่อ 18 ต.ค. 2023
- Every PC has a battery on its motherboard to support real time clock operation during power downs and store bios settings. Raspberry Pi 5 is the first Raspberry Pi besides some compute module carrier boards to feature a rechargeable lithium battery connector. But there are also alternatives, such as a non-rechargeable common CR2032 lithium battery that I used.... Watch the video to see, how to do it...
- วิทยาศาสตร์และเทคโนโลยี
For future reference, the connector is a JST SH, and while you can crimp your own, they are very fiddly.
I bought a variety pack of 60x pre-crimped 2p, 3p, 4p and 5p pigtails for under $12 on next day delivery.
Cool!
Sadly I've now built two of these, tested then on the one Pi 5 we have, and neither work.
I don't know if it's the diode that I'm using, but at the connector I'm only getting 2.94v and that doesn't appear to be enough to power the Pi 5's RTC chip.
I've also read that the RPi draws a lot more than a PC RTC, so it would only last months, rather than years anyway.
I've tested it myself and it is enough, it is well in the acceptable voltage range. Check polarisation of the diode and also make sure that you've made good contacts (GND & battery voltage - You can measure it with a voltmeter with tin tips, if you touch two small contacts on the PCB where the battery connector is soldered as a battery is plugged in. You must measure the battery voltage on these contacts!) to the small external battery connector on RPi 5 PCB. I had problems with this. It's hard to get a home built plug right!
What voltage are you getting after the diode @@pcusbprojects? It maybe that my batteries are too weak. Most of my 2032's are cheap bulk buy's or ex. PC BIOS batteries, so if the voltage you're getting is higher, it might be worth buying some new branded 2032's to try out too. Alternatively, there could be something wrong with the RPi 5. As we only have one to test with at the moment, we can't do any kind of side-by-side comparison.
I measured approximately 2.8 V as shown in the video... I suggest that you take a look at ML2020 specification: pdf1.alldatasheet.com/datasheet-pdf/download/597029/PANASONICBATTERY/ML2020.html. You'll see that even 2.5 V is good enough. There is almost no electrical current needed to power the RTC, so a new CR2032 battery is more than capable to power RTC. Use a new battery that measures about 3 V and 1N4001 diode as shown in the video. Make sure to have good contacts on RPi 5 battery connector. It works!
The zoom must be broken
May I presume that you've meant the camera zoom? But CR2032 battery works great for me and it is hopefully easy enough to make the circuit for everybody...
why computer voice?
Do you like the content?
@@pcusbprojects Not with that voice.
Because it is a technical video, I believe the content and the clarity of it's presentation are much more important than an artistic impression.
@@pcusbprojectsits hard to listen to. I can’t stand that monotone robotic voice. Find some better software or just use your real voice.
Watch my newer videos. I don't use artificial voice anymore....
There is an RTC battery as an official accessory for a Raspberry Pi 5.
You're putting in way too much effort.
I'm not saying that it is easier to build your own battery assembly that to buy and attach one. Those were the days when you couldn't buy RPi 5 accessories in a computer store and I had all the material at hand. It was in fact quicker and easier for me to build a battery assembly than to order one and wait for weeks...
@@pcusbprojects I only had to wait two days for my battery but ok.
Excellent! But many that don't live in large cities in EU and USA may have to wait much longer for a delivery, especially if customs procedures are involved.
You never said if it actually worked or not you never tested out a real product you jerry-rigged the battery and once you were done said the standard one would be better this was a soldering tutorial more than anything
The battery still works perfectly. I use my RPi 5 every day. You must assure a firm battery contact. Obtaining a proper connector may be difficult. I've explained it all in the video. Maybe I'll make another video in the future to demonstrate how durable my extensions to the original Raspberry Pi 5 are. But you can already watch: .th-cam.com/video/et1wgdEHP6Y/w-d-xo.html to find out, how they perform after 4 months of extensive everyday use.. Everything works perfectly for now, watch videos: th-cam.com/video/BINHFtPJi7o/w-d-xo.html, th-cam.com/video/PfeveeyDzYU/w-d-xo.html, th-cam.com/video/-snEAUa19lY/w-d-xo.html, th-cam.com/video/Y-xlOSC9IEI/w-d-xo.html, th-cam.com/video/SMg938ZtYWQ/w-d-xo.html, th-cam.com/video/rZ0VvZf2uRo/w-d-xo.html to find out more... Cheers!