ฝัง
- เผยแพร่เมื่อ 27 ก.ย. 2024
- I decided to convert UV-K5 12V battery eliminator to USB-C
Why?
1. I want to power radio at home without battery from USB-C.
2. My adapter heats up quickly on TX as radiator inside is small and it have to convert more than 5W into heat (14v-8v)*1A. I’m going to configure USB-C board to request 9V instead of 12V, it should decrease heat/power loss to about 1W.
3. My adapter power cord output is on the bottom. I want to remove that, so radio can stay on my desk.
3. I already have all parts needed, so it’s the cheapest way form me.
I documented my project just in case somebody wants to know what is inside the adapter.
How?
I added PD/QC/AFC Type-C Decoy Board USB Boost Module and configured it to 9V. Total project cost including battery eliminator and PD board is about $5.
This video was fantastic for helping me cut mine open. Here's what I did more specifically. Near the top, where this video starts cutting, you can see a small seam, it's got a rounded edge. Start digging your knife in there until you feel it give way. Now you can gently flex it until you're able to get a stronger tool in there or your fingers, and lift the rest off. You're gonna cut the soft plastic a bit and it's gonna be messy, that's normal. (Those battle scars will show you've improved it!) It's hot glued on, it'll pull off though, just go slow.
... but in my one, there's a toroid instead of just the IC and capacitors! I hope to document this on my blog soon, I don't think I can link it in comments but you can see it in my profile. They put a LOT of hot glue on the board though so I haven't been able to see underneath to see if they put a switching IC in here or what's going on... There is SOMETHING on the other side of the board, I just can't see what.
Mine had a Quansheng January 2024 manufacturing sticker on it FWIW. They also claim it can take 24V... but I really wouldn't wanna see what happens if you tried to TX with that input voltage! 73 DE VK2LNA
Thank you for your detailed instruction. I saw some photos of battery eliminator with the toroid inside, so there are at least two different schematic of these. Mine is the cheapest I could find. Good luck in your project and hopefully toroid version is not RF noisy as well.
If you use black silicone it will look better!😉
Thanx for the awesome upgrade!!!