我查了下，460MHz好像不在国内的公众对讲机频段里面。国内公众对讲机频段应该是在409不是。我就在纠结要不要退货。

@"hellopangwa"#p48955 好吧，问题是从并夕夕上买的，退货红包就没有了。不行我转手算了。

[upl-image-preview uuid=37a131b6-2016-4a18-9ef6-4f227d013063 url=https://storage.hamcq.cn/2025-01-06/1736133869-511572-mvimg-20250106-0957011.jpg alt={TEXT?}] 诸位给掌掌眼，看看如何把频率给调整到409去。总不能更换晶振吧。

美帝的GMRS频率吧，出口转内销的机器

@"BI4MIG"#p48952 国内认准麦当当对讲机。

@"WWNNL"#p49071 麦当当不错，当时给朋友做并夕夕的助力任务买的，到时候返现。话说麦当当也没法改频吧。麦当当用的芯片是基于BK4802的对讲机，昨天搜到一个利用这个芯片制作的开源对讲机：灵犀LX-B。成本50元。不过我买这一套便宜就二十多。

@"BG4ILW"#p49091 [upl-image-preview uuid=b8404147-1bba-42ec-aec0-ecd103210add url=https://storage.hamcq.cn/2025-01-07/1736211032-466750-img-20250107-084845.jpg alt={TEXT?}] 话说上面这个是单片机还是下面这个是啊

跟商家要个写频软件自己写？

I bought a pair of children's walkie-talkies with a frequency of 462.56 MHz.

BI4MIG

I checked, and it seems that 460 MHz is not within the public two-way radio frequency bands used in China. The standard public two-way radio frequency band in China should be 409 MHz.
I'm just trying to decide whether or not to return it.

WWNNL

BI4MIG The domestically recognized "McDonald's" two-way radio.

hellopangwa

Mitigate the risk of -5000.

BI4MIG

hellopangwa
Okay, the problem is that I bought it from and-xi and there's no refund voucher left. No, I'll just sell it on my own.

BI4MIG

Everyone, take a look and see if you can adjust the frequency to 409 Hz. We definitely don't want to replace the crystal oscillator.

BH2VYJ

The GMRS frequencies used in the United States for exporting and then selling domestically.

venzo

BH2VYJ The correct answer

BD4XFK

BH2VYJ Yes, the public frequency according to US standards.

BI4MIG

WWNNL
McDonald's was good; I bought it to help my friends complete their tasks and get rewards later.
However, it seems like McDonald's cannot change the frequency. The chip used in McDonald's is based on the BK4802 walkie-talkie. I recently found an open-source walkie-talkie made using this chip: Lingxi LX-B. The cost is 50 yuan. But when I bought it, it was only around 20 yuan.

BG4ILW

I didn't manage to capture the chip's model number.

BI4MIG

BG4ILW

By the way, which one of these is a microcontroller?

A1A

Should I get a video creation software from the vendor and create the video myself?

BI4MIG

A1A
This is simply not feasible. The business is just a retailer of children's toys, and they are not involved in wholesale or electronics. I also think the construction of this toy is quite simple; manufacturers often buy pre-made circuit boards and assemble them with a few screws.
The vendor explicitly stated that I could not adjust the frequency; this falls under my responsibility to modify it myself.

BI4MIG

After persistent effort, I identified the chip brand as PUYA. Then, I searched online and found a similar chip: PY32F002AL15S6TU.

Based on this naming convention, we can infer that the chip's model number should be PY32F002AL15S5 or PY32F002AL15S5. I will continue to research and update this information as needed.

PPPPPAN

BI4MIG PY32F002AL15S6, a 32-bit microcontroller from Shanghai Purren Semiconductor, featuring an Arm® Cortex-M0+ core, a 24 MHz clock frequency. However, the official website currently does not have any information about the 002a series.

NiuB

The ones I bought cost around 100 yuan each, and they were BK4819.

BI4MIG

NiuB
This device is powerful and has a screen, but it's also expensive. I have a Moto GP518 (which is actually a rebranded Valco C51) for around 30 yuan each, which can record audio, but I haven't opened it to check.

furryQS-BI1VVQ

This seems to be a machine for international trade, possibly operating in the CB (Citizen's Band) frequency range.

BI4MIG

furryQS-BI1VVQ
And also the toys I bought yesterday. This is an example of exporting and then selling domestically, which might not be ideal.

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