Category: Devices

Hardware reviews

HT-2000 CO2 Meter

Yet another CO2 Meter. This model can operate from 4 AA batteries or from power supply 5v 0.5A MiniUSB. May be built on different sensors. My happened to be built on Sensair s8.

Pros

Screen have backlight option
Portable (battery operation)
No date/time on screen
Have CR1220 inside to keep settings
Have adjustable CO2 alarm level

Cons

Need 25 seconds to start
Display wrong temperature
Size (140x100x40mm)
Weight ( 350g)
No date/time on screen
Battery life is about 8 hours
Not rechargeable

Tags CO2

air quality

AirVisual node

Yet another air quality monitor. Measure PM2.5 and CO2. Have a rechargeable battery that allows hours of work without a power plug. Have Wi-Fi and mobile application to access data.

What is wrong with this device – no support for Ukraine. No external Air quality data for Ukraine, cannot choose Ukraine from a country list during setup. It is also ambient light sensor missing (only manual screen brightness setup).

UPD from 2018-02: Now support Ukraine, but only two private external monitors available (in Kyiv and Brovary)

Tags CO2, PM2.5

DVR

NextBase iN-Car Cam 412GW

Post author By liutyi
Post date 2016-12-18
No Comments on NextBase iN-Car Cam 412GW

Dashcam from UK on Novatek NT966xx chipset with 1440p recording.

I like

connector that easy to mount/unmount using one hand
suction cap and adhesive types of the mount
resolution and image quality both day and night is OK
video stamp (one line, speed without leading zero, removable logo)
time sync from GPS
up to 30 minutes video recording without external power
Wi-Fi and iPhone app to copy videos
firmware updates exists
small 12-24v to 5v 1.5A power adaptor

I do not like

Wi-Fi cannot operate during dashcam recording
Wi-Fi too slow to play 1440p video from dashcam
not adjustable video frame rates and bitrates
buttons
size
screen quality
icons quality

Neutral

absence of SpeedCams, Line Departure, Front Collision
only English in Languages.
Parking Mode exist.
140 degree view angle

Tags dashcam

apple Devices iphone

olloclip Macro Pro

New iPhone7 and iPhone7 Macro lens set from olloclip. 7x, 14x, 21x. Compatible with both iPhone 7 and iPhone 7plus. Now with interchangeable lens.

Lens holder may also be used as an small tripod

Example macro photos

2 EUR Coin

Devices

Xiaomi Mi TDS Pen

Water purity tester from Xiaomi.

Measurement examples:

Distilled water: 0-2 ppm
Office coolers: 60-80 ppm
Brita Filter: 160 -170 ppm
Tap water: 240-260 ppm

air quality

Awair

Post author By liutyi
Post date 2016-12-02
No Comments on Awair

Awair. Air quality monitor. Measure Humidity, Temperature, CO2, VOC (Hydrogen gas, Hydrogen Sulfide, Ammonia, Ethanol, Toluene, Formaldehyde), Dust (PM2.5 PM10). That is somehow more than netatmo can do.

Device shows air quality metrics as a dot bars. Where one dot is good and five dot are bad. It is also general “Awair score” on the screen both by number (100 is best, zero is worst) and by color of the LED (green is good, red is bad).

Awair also can work as clock (but only in 12h mode).

In addition to local indication device is also send data to a cloud using Wi-Fi (802.11n 2.4GHz), that allow to see the data using iPhone or Android on a remote locations.

Tags CO2, PM2.5, VOC

GPS iOS

iOS navigation apps for Kyiv

Post author By liutyi
Post date 2016-11-20
No Comments on iOS navigation apps for Kyiv

Quick overview of GPS navigators with traffic information in Kyiv, Ukraine. November 2016. What is available:

iGo is based on here maps that is 1-2 years old. Traffic is more or less adequate, but loading of traffic is slow, and there are no traffic events. UI is old-school and slow, but nice. At least during driving. It is not free.

here good free up-to-date map with traffic, but without traffic events and without events reporting.

Google have 3D building but unable to show it during navigation. Good map of traffic, but without events. No traffic events reporting.

Yandex good traffic and a lot of user reported accidents, road works, etc. Without navigation in offline mode.

Waze have poor traffic map contain only reported data. Map is average quality, but may be edited by on site

Tags Google, GPS, here, igo, Sygic, yandex

apple Devices iphone

iPhone 7

Post author By liutyi
Post date 2016-10-02
No Comments on iPhone 7

Now it is black again. ~~Gold~~ Black is best. Same Size as iPhone 6/6S. With improved antena section color design. Better camera that is shifted a bit to the phone edge.

New Home button. That is not actually button any more. Finger clicks work fine in general. Click in gloves or using nails do not work anymore. Fingerprint recognition speed and quality same at it was on iPhone 6S.

No more analog audio connector. Hmm. OK.

Stereo, waterresistant, faster, brighter.

Tags iphone

Devices Flash

Transcend JetFlash 710S

Yet another small and relatively fast USB Flash. Transcend JetFlash 710S (TS32GJF710S) 32 GB.

Test results are very different on different system and test versions.
CrystalDisk Mark 3
JetFlash710S_CrystalDiskMark3
CrystalDisk Mark 5
JetFlash710S_CrystalDiskMark5