Do you understand the sensor of your wearable device?
Introduction:
A Battery Tester is an electronic device
intended for testing the state of an electric battery, going
from a simple device for testing the charge actually
present in the cells and/or its voltage output, to a more comprehensive testing
of the battery's condition, namely its capacity for accumulating charge and any
possible flaws affecting the battery's performance and security.
Simple battery tester
The most simple battery tester is a DC ammeter,
that indicates the battery's charge rate.[1] DC voltmeters can
be used to estimate the charge rate of a battery, provided that its nominal
voltage is known.[2]
Integrated battery testers
There are many types of integrated battery testers, each
one corresponding to a specific condition testing procedure, according to the
type of battery being tested, such as the [421" test for lead-acid vehicle
batteries.[3] Their
common principle is based on the empirical fact that after having applied a
given current for a given number of seconds to the battery, the resulting
voltage output is related to the battery's overall condition, when compared to
a healthy battery's output.[4]
Features:
The features of each OBD code reader
depends on the make and model.
However, it is common for most readers
to have:
LCD screen readouts
View diagnostic trouble codes (DTC's)
Ability to reset / clear DTC codes
Get "snapshot" data so you
can view what was going on when the code was triggered
Higher-end OBD code readers can have
more advanced features such as:
Languages other than English
Code definitions right on the unit
Display freeze frame data
Pricing:
OBD-II code readers vary in price.
They range from an affordable price
($85) to many hundreds of dollars, or more.
Photos:
More
Information:
If you're interested in getting more
information on OBD-II code readers or are interested in purchasing one,
check out complete list of Frequently
Asked OBD Questions, and also the ads throughout this site.
Some brand names of OBD readers are
Carsara, Cartrend, Actron, Innova, etc.
Reference
Links:
Battery Tester Battery Tester,Car Battery Tester,Voltmeter Alternator Analyzer,Battery Health Check Shenzhen Cartrend Technology Co, Ltd , https://www.cartrendthings.com
Accelerometer
The accelerometer is the most basic type of sensor that can be used to measure the direction and speed of motion. The Apple iPhone is the first smartphone to use an accelerometer that detects the direction and trajectory of the phone. In wearable devices, accelerometers can often be used to determine your steps and sleep quality. By measuring your movement speed, the accelerometer can “tell†the wearable device how far you are going, and if your wrist hasn’t been moving, it will think you are asleep.
Altimeter
Monitoring the weight change of the user is an important function of the wearable device, and the role of the altimeter is to calculate how many stairs you have climbed, how many calories you have burned, and whether you have become fat or thin. The altimeter can detect that you have climbed a few floors through atmospheric pressure changes, and combined with the number of steps you have taken, to perform more accurate calorie consumption calculations.
Gesture control sensor
This is a kind of sensor that can detect movements of various parts of the body. The user can control the equipment through some simple actions, such as waving a hand. For now, this technology is still in the development stage, but its future application may give us no small surprise.
GPS positioning
GPS is mainly used in high-end sports watches. However, some Android Wears, including Moto 360, are also equipped with GPS technology. GPS is an essential feature if you want to ensure that all your exercise data is correct. It should be noted that GPS consumes a lot of power and requires constant search for signals.
OLED
Organic light-emitting diodes (OLEDs) are generally used for display screens of wearable devices and can achieve very clear and bright display effects. In general, if you buy a wearable device that does not have this technology, it's equivalent to a waste of money. In the future, we will see some technologies that make the display more clear and bright, and even achieve 3D effects. However, for the moment, OLED is already the best display technology on wearable devices.
Optical heart rate monitoring
This device usually uses a red or green light spot on your wrist to detect your heart rate. This technology has been around for a while, but it has only been applied to wearable devices. It is mainly aimed at sports enthusiasts. Its appearance has caused us to bid farewell to the cumbersome chest strap heart rate sensors.