Let’s talk about how to design a “safe” intercom (attached with organized intercom principles, disassembly, and DIY resources)

okhxyyo

Let’s talk about how to design a “safe” intercom (attached with organized intercom principles, disassembly, and DIY resources) [Copy link]

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The trending search has exploded. If you have seen it, you should know what Guanguan is referring to.

Let’s chat today and talk about how to design a “safe” walkie-talkie.

If you want to design a walkie-talkie with a high safety factor, what do you think is the most important point? ? ?

What are the technical key points and difficulties?

Attached is the organized walkie-talkie resources. If you are interested in understanding or want to copy them, you can collect them:

RF Power Management

How to choose the best power solution to improve RF signal chain phase noise performance

Design of wireless RF transceiver system based on serial port transparent transmission

【Wireless digital intercom based on GDF350】

SPEEX walkie-talkie: completely open source = schematic + source code

The recently popular McDonald's intercom is disassembled to see what its internal structure looks like.

Simple FM walkie-talkie

SSB intercom design report

Building access control intercom host schematic diagram

MK_Intercom Principle, Usage and Diagrams (Part 2)

Intercom Principles, Usage and Diagrams (Part 3)

Realizing the functions of radio and intercom by using C8051 microcontroller and RDA5820

Single sideband AM walkie-talkie program msp430 single chip microcomputer control to achieve wireless data transmission

Design of CDMR digital intercom based on SCT3918

Design of digital intercom terminal based on LPC4357

The most comprehensive DMR digital walkie-talkie technology summary

Simple FM walkie-talkie

Wireless digital intercom based on GDF350

天英科技

What do you mean by safety?

okhxyyo

Tianying Technology published on 2024-9-19 10:39 What do you mean by security?

Hardware security, anti-scalding and anti-explosion; software security, stable signal, will not be intercepted, will not be serialized, etc.

吾妻思萌

Add an overheat alarm, beep. As long as the temperature is above 70 degrees, it will beep for half an hour and then shut down automatically.

okhxyyo

Azuma Simeng posted on 2024-9-19 14:52 Add an overheat alarm, and it will scream. As long as the temperature is greater than 70 degrees, it will scream for half an hour and then shut down automatically.

Will it automatically shut down after half an hour?

Is this time up for debate?

led2015

If the radio is left in a hot environment (such as in a car in direct sunlight) for a long time and is unattended, might a longer warning time be more necessary?

okhxyyo

led2015 posted on 2024-9-19 21:17 If the intercom is left in a high temperature environment (such as direct sunlight in a car) for a long time and is unattended, is a longer warning time more necessary?

Um, if the intercom is left unattended for a long time, does it mean that it is not in use? I can't think of any special situation where it is in use but unattended for a long time. Are there any examples?

吾妻思萌

okhxyyo posted on 2024-9-19 17:30 Will it take another half an hour before it automatically shuts down? Is this time up for discussion?

Just to make loud noises in the downtown area to alert people and reduce casualties~

freebsder

This hot spot is good

okhxyyo

freebsder posted on 2024-9-20 16:59 This hotspot is good