I'm an absolute beginner in DIY electronics, so please explain this to me simply. I bought an FM Radio DIY kit that runs on 3 AA batteries, but it also has a micro USB socket. However, the kit warns that the "Micro USB is not available" and it states that it can't get voltage from USB. I'm confused about why they would include this feature if it doesn't work. Is there a reason for this limitation, and is there any way I can make it work? I think the radio needs 4.5V, but I still wonder why the USB socket is there if it won't function. Also, I'm still getting used to this English technical jargon since it's not my first language, so any clarification would be great!
2 Answers
Hey there! It sounds like you're dealing with a bit of a puzzler. There might be a few reasons for the USB socket being labeled as 'unavailable'. First, the manufacturer could have left out components that would allow the USB to power the radio, which helps keep costs down. Alternatively, it could be designed only to work with either batteries or USB, not both. It's also possible that they designed it for very low power, so the USB can't handle the current it needs to work properly. Sometimes, these kits come from places where they don't always test everything thoroughly, especially if they are cheaper products from sites like AliExpress. My guess is it’s one of those cases! If you're keen to try it out, check the schematic carefully to see if you can spot missing components, or consider reaching out for help on some DIY forums with your specific kit details!
It's really tricky without seeing the actual kit or the schematic, but here's my take: sometimes these kits are just cheap imitations of better-known designs. They might have thrown in a USB port thinking it could be useful but never intended for it to actually work. It's super common to find these design mistakes in low-cost kits, especially from budget suppliers. If your schematic shows missing components that you think are necessary for USB functionality, you might consider adding them yourself if you feel up to it! Just be cautious with soldering!
Thanks, this makes sense! I might give it a shot and see if I can add anything. Appreciate the advice!
Sounds like a solid explanation. If you provide the schematic, maybe others can help you troubleshoot more specifically on how to get that USB port working!