An improved 2.1 version of the Smart Citizen Kit is now ready for pre-ordering.
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What does the 2.1 version measure?
The Smart Citizen Kit focuses on the weather, sound, light and air quality. The following overview shows the different sensors in version 2.1:
Temperature (°C) – Sensirion SHT31
Relative humidity (% rh) – Sensirion SHT31
Noise level (dBA) – Invensense ICS4342
Ambient light (lx) – Rohm BH1721FVC
Air pressure (barometer, kPa) – NXP MPL3115A2
Equivalent carbon dioxide (CO2 in ppm) – AMS CCS811
Volatile organic compounds (ppb) – AMS CCS811
Particulate matter (PM1/2,5/10 in μg/m3) – Plantower PMS 5003
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Our findings in 2014 showed that the housing can be an important factor by influencing the sensors; there must be sufficient air flow, but also a watertight environment. And the placement is important (not in full sun for example).
I could not find the promised follow-up video at haus-automatisierung.com – YouTube, but the manual steps and the site below have enough information for me.
Too bad the site is way to big to fully archive in the WayBack machine. I only saved the top pages:
Build an IP Surveillance Camera with the ESP32-CAM board. The ESP32 Camera hosts a video streaming web server that integrates with Home Assistant or in any browser.
Schematics show it uses an LM317 linear voltage regulator (to get 5V out of a 8V-35V range) next to the ACS712 current sensor (based on the [WayBack] Hall effect) available in 5A, 20A and 30A varieties.
When connecting NeoPixels to any live power source or microcontroller, ALWAYS CONNECT GROUND (–) BEFORE ANYTHING ELSE. Conversely, disconnect ground last when separating.
Adding a 300 to 500 Ohm resistor between your microcontroller’s data pin and the data input on the first NeoPixel can help prevent voltage spikes that might otherwise damage your first pixel. Please add one between your micro and NeoPixel.
Before connecting a NeoPixel strip to ANY source of power, we very strongly recommend adding a large capacitor (1000 µF, 6.3V or higher) across the + and – terminals. This prevents the initial onrush of current from damaging the pixels.
Be extremely cautious with bench power supplies. Some — even reputable, well-regarded brands — can produce a large voltage spike when initially switched on, instantly destroying your NeoPixels!
If you use a bench supply, do not connect NeoPixels directly. Turn on the power supply first, let the voltage stabilize, then connect the pixels (GND first).
[WayBack] Yepkit – Electronics: YKUSH Yepkit USB Switchable Hub (models for USB 2 and USB 3.1 allowing to switch 3 ports at maximum)
[WayBack] Robot Electronics: Relays (both mechanical and solid state) in many communication kinds (ethernet, USB, RS485, TTL, Bluetooth, Modbus, MIDI and DMX) and sizes (from 2 to 24 ports).
[WayBack] GitHub – dschmenk/apple2pi: Apple II client/server for Raspberry Pi: hybrid computer of a Raspberry Pi inside an Apple II (either ][, or ][+, or //e) so the Apple II can be a front-end to the Raspberry Pi which then can run an Apple IIGS emulator, talk to the Apple II storage hardware and much more.
PiServer is our new piece of software that makes it easy to create a network of Pis you can centrally control — ideal for your computing classroom or club!
The Wiert Corner - irregular stream of stuff 