[DigiKey "Smart Creation, Non-stop Happiness" Creative Competition] Smart Kitchen Safety Alarm | Unboxing Post

alanlan86

[DigiKey "Smart Creation, Non-stop Happiness" Creative Competition] Smart Kitchen Safety Alarm | Unboxing Post [Copy link]

 

After returning from a business trip, I saw a large package on my desk. I couldn't wait to unpack it and take a look at the boards sent from Digikey.

The core controller "big head" - Ardunio Nano RP2040 Connect

The Ardunio Nano RP2040 Connect accounts for half of the "materials cost". Of course, there are reasons for choosing it:

1) The compact and reliable Nano board supports BLE and WiFi connections, making it ideal for IoT applications. This also means you can leverage the power of cloud computing and is fully compatible with Arduino Cloud.

2) Microphones and motion sensing further enrich the application possibilities. The built-in microphone can be used for voice activation, audio control, and even AI voice recognition. The six-axis smart IMU has AI functions (prompting the board in the direction of movement) and adds fall sensing and double-click activation functions.

3) Of course, the use of Pico/Pico W in the previous Follow me activity made me familiar with Raspberry RP2040, which made it much easier to use.

Express packaging:

(1) Group photo

(2) Small and powerful main control

(3) Gas sensor

For this critical device, I chose to purchase three modules, namely MQ2, MQ6, and LPG, considering that different sensors have different performances for coal gas/liquefied gas/volatile gas.

Regarding sensor selection, here is a little science:

MQ-2: covers common combustible gases. MQ-3B: alcohol. MQ-4: natural gas/methane. MQ-5B: liquefied petroleum gas, natural gas, artificial gas. MQ-6: liquefied petroleum gas, propane. MQ-7B: carbon monoxide. MQ-8: hydrogen. MQ-9B: carbon monoxide and other combustible gases. MQ303B: alcohol. MQ131: ozone. MQ135: air quality detection (ammonia, benzene, alcohol, smoke particles). MQ136: hydrogen sulfide. MQ137: ammonia. MQ138: volatile organic compounds (aromatic alcohol, benzene, acetaldehyde, ketones, ethers).

The 9 common gas sensors include:
MQ-2 - smoke gas sensorMQ
-3 - alcohol sensorMQ
-4 - methane sensorMQ
-5 - liquefied gas natural gas city gas sensorMQ
-6 - isobutane propane sensorMQ
-7 - carbon monoxide sensor moduleMQ
-8 - hydrogen sensorMQ
-9 - carbon monoxide combustible gas sensorMQ
-135 - air quality detection sensor

(4) Other modules: relay module/speaker

Considering the need to close the gas valve (actuator), a relay module was selected as the switch actuator. In addition, in the previous follow me activity, there was an I2S voice playback module. This time, a 3W speaker was added, which can be used for voice alarm or sound playback.

Next, we need to start designing and explore the characteristics and functions of the sensor. Look forward to the next sharing!!!

wangerxian

Your development board has quite a few peripheral devices, including microphone, six-axis, and WIFI.

alanlan86

wangerxian posted on 2023-10-30 16:08 Your development board has quite a few peripheral devices, such as microphone, six-axis, and WIFI.

Yes, what I like is that I can pair the RP2040 with some sensors, so that the subsequent playability is quite good!

wangerxian

alanlan86 posted on 2023-10-30 19:55 Yes, I like the idea of pairing RP2040 with some sensors, which makes the subsequent playability quite good!

How much does this board cost?

alanlan86

wangerxian posted on 2023-10-31 09:24 How much does this board cost?

244RMB

alanlan86

I tried playing with Arduino today, but after flashing, I clicked BOOTSEL again and connected it... I couldn't enter boot mode and the USB flash drive didn't come out... I was so panicked, thinking the USB was dead... I looked up some information and found that I could hold the Flash (short REC pin to GND) to stop the code, then double-click bootsel to successfully re-enter Boot mode.

Detailed reference:

Nano RP2040 Connect Cheat Sheet | Arduino Documentation

wangerxian

wangerxian posted on 2023-10-31 09:24 How much does this board cost?

The price is a bit expensive, but it is still good to have peripherals and can make a good work.