Questions tagged [wearable]

Wearable describes a computing device which can be worn.

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What type of battery is used in Oura ring? [closed]

What type of battery is used in Oura ring, and how many mAh is available? I am not sure how does Oura ring manage to claim up to 7 days of battery life. Should not using an LED and BLE connection in ...
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4 answers
238 views

How to calculate the expected output current being drawn by a speaker?

I'm trying to calculate the current that will be drawn by a 4ohm 3W speaker from a MAX98357a IC amplifier. From my understanding, the amplifier takes in a I2S audio signal (which originates from an ...
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1 vote
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How to improve capactive sensor when there is a floating local ground [duplicate]

I am using a microchip MTCH101 IC as a proximity detector (based on a self-capacitance electrode) and i have some trouble in detection because of a floating local ground (i guess). The sensor is power ...
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173 views

Can max86150 use in wrist?

I am looking for an SPO2 sensor where I can mount on the wrist. but most data sheets do not specify whether sensors can be used in wrist-mounted devices. they mention fitness or just wearables, I ...
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Display power consumption ratio of smartphones and smart watches

What is the most power-consuming part of your smartphone or smartwatch display? Or is it cpu? Naturally I think that it will change depending on the situation, but general use is assumed.
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2 votes
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Can I extrapolate battery power by a brief observation?

Part of the research we are conducting requires us to estimate how detrimental our proposed algorithm to the battery life of the wearables. To do so, I opted to simply charge the wearable to 100% and ...
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2 votes
2 answers
3k views

Is BLE 5 backwards compatible to BLE 4.x ? Can a phone with bluetooth 4.x talk with a device with BLE5

I would like to develop a wearable with a BLE5 module. I wonder if this module would work with any BLE4 enabled mobile phone? I am aware with that it may not use the advantages of BLE5, but I don't ...
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1 vote
2 answers
565 views

Using microphone for heart beat (BPM) calculation in wearable device?

I am not a expert here. But for a software project of mine I was scratching my head for a wearable device which can monitor heart rate continuously (battery efficient). I have one wearable device Sony ...
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1 answer
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Bridging 3G/LTE from cellphone to IOT device

I have an IOT device that needs to function as an access point, even without close by wifi signals, and then publish a wifi network. I know that I can achieve this with a 3G/LTE/GSM module but given ...
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1 vote
1 answer
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Vibration coupling through clothes as function of frequency

Serious question. Trying to figure out if there is any research/guidelines on selecting the frequency of a vibrator for a portable electronic device. This is safety related wearble device for first ...
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3 answers
82 views

Are Adafruit RGB 30 LED/m flexi-strips suitable to wear in large numbers? [closed]

I am working on a project that involves using a large number of LEDs on a single garment. According to my initial design, I would need as much as 1800 RGB LEDs. I have seen these LED strips from ...
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1 answer
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USB power pack in wearable electronics: Is it safe?

I'm developing a wearable electronics product that runs on batteries. I would like to use a USB power pack like this as the battery, but I need to make sure it's not a fire hazard because it's going ...
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Circuit for overdrive on vibrotactile motors

I have a school project where I have to create a haptic feedback wearable with vibrotactile motors. I have gotten the prototype ready which includes motors connected directly to the Raspberry Pi GPIO ...
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1 answer
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Safety considerations in Android Wear products using high resistance electrodes

I am wondering how wristlet devices can safely measure a person's heartbeat without risk of electric shock. It seems everywhere I read, the threat of static discharge would be far greater with an ...
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1 vote
3 answers
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What is the best sensor to use in a wearable device to monitor body temperature on a continuous basis: Thermistor, RTD or a semiconductor device? [closed]

Most wrist-worn wearables on the market today don’t seem to feature body temperature sensing which makes me wonder if all these sensors are inadequate in some ways.
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Body as a power supply

First question is does our body actually generate current? My guess is that it's a yes, we're technically a walking battery. I know that if I touch probes of a multimeter, we can measure some kind ...
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Battery powered, wearable, non line of sight, short range metal detector?

I want to build a circuit to detect when people bring their hands close to their mouth. This could be used to warn chronic nail biters of impending nail biting for example :) The idea I have is that ...
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-1 votes
1 answer
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How do wearables track exercises without taking input from user?

Recently there have been wearable devices that can track your exercises and reps (eg bench press, push ups, pull ups) without the user telling them. What technology do they use to track these ...
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2 answers
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Ways to communicate GPS coordinates to a central server wirelessly from a wearable device

I am currently looking at designing a wearable device for a client, which can communicate GPS coordinates back to some sort of central server (to then be sent out to other communicating devices such ...
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1 vote
3 answers
487 views

Using two batteries to increase current sourcing capacity

I'm working on a project where I am planning to use two 5V USB Power Banks because one cannot supply sufficient current. These Power Banks are 20,000mAh each and have built in circuits to regulate ...
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-4 votes
2 answers
340 views

What is the best way to power a wearable device such as flexible oled screens? [closed]

What is the best way to power a wearable device such as flexible oled screens? Possibly a way that wouldnt alter the size of the wearable?
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1 answer
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GSM modules or WiFi?

I'm trying to work on a prototype wearable indoor and I am really confused as to how I am going to transfer data fetched from the GPS device to the server. Is ...
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1 vote
0 answers
127 views

Glucose, Sugar level sensors

I have a hobbie project in which I'm trying to assemble a wearable health/fitness oriented device and I want to measure my blood sugar levels. I've visited this area first 5 years ago and technology ...
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1 answer
382 views

USB lights up simple circuit but not coin-cell

I have 13 adafruit LED sequins in parallel hooked up to a CR2032 coin cell. This cell is also hooked up to an adafruit Gemma board (Arduino-like board using an Attiny85). Pads D0 & D1 on the Gemma ...
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1 vote
3 answers
353 views

Directional haptic bracelet

I'm trying to build a bracelet (fastened such that it does not rotate with respect to the wrist) with small vibrating motors at regular intervals. The goal is to pulse these motors to indicate the ...
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Flat connectors and flexible cables for a glove-mounted LED strip?

About a year ago made a LED-studded glove from flexible LED strip (like https://www.sparkfun.com/products/12027 but without the silicon coating) for a party. Because I wanted to keep some mobility in ...
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1 answer
2k views

Bluetooth Headset to Bluetooth Transceiver

I have a little bit of experience with Bluetooth and Arduinos but I was wondering if anyone might be able to tell me if it is possible for a Bluetooth headset to be linked to a Bluetooth transceiver ...
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3 answers
2k views

sensors for detecting breathing movements

I am looking to find out what sensors can i use in my wearable, to detect if someone is breathing.. we would also like to find out their breathing pattern if it is long deep breath or shallow breath.
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5 votes
2 answers
440 views

How should I design a power bus for a wearable project?

I am thinking about building a(nother) wearable LED jacket project. The basis will be 60 LED/m WS2812B strips, around 2048 pixels, for a peak possible current draw of just under 125A. In reality I ...
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1 vote
0 answers
141 views

Wearable electronics in which kind of electrically-insulated mold?

I have a wearable electronics that I need to keep in my finger. I don't have the resources to put a prototype into something small like custom ASIC so I would like to find a way to put it to shape it ...
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7 votes
5 answers
8k views

Simplest circuit that flashes and fades color LEDs synchronized to music?

This is about designing a circuit that can control multiple LEDs synchronized to music or sound, as simply as possible. I am looking for some conceptual ideas to start out with, not a complete circuit ...
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12 votes
2 answers
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Is it possible to use Kinetic energy to power small devices?

I've tried looking around for as much information as I could gather to build really small wearable electronics that could power themselves by generating energy with movement. I know that the ...
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2 votes
1 answer
339 views

Accellerometer and arduino lillypad and wearable projects

I have just bought an Arduino Lillypad and an MMA8452 accellerometer board and i have few questions: 1) Power supply on lillypad I know that working with accellerometers is a little bit dangerous: if ...
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3 votes
1 answer
5k views

blend or flex sensors

i have to build a kind of dress that can unserstand the blend angles of neck, shoulder, elbow, wrist. i thought the best is to use arduino lillypad and some flex sensors. i've saw this: http://...
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4 votes
1 answer
303 views

How can I measure which finger is moving in a glove?

I am considering building a pair of gloves that make a chorded keyboard. In order to measure whether or not a finger should be triggered, I intend to leverage the fact that as you curl your fingers ...
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7 votes
3 answers
10k views

Cheapest, simplest way to implement a Bluetooth keyboard/mouse?

Thinking of building a device for sending text and probably mouse movement into a computer, but I want it to be wireless and compatible with many computers/PDAs/phones without a specialized dongle, ...
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5 votes
4 answers
12k views

What kind of laser should I get to cut fabric?

I'm brainstorming a new project with my wife and was wondering what type of laser I could use to cut multiple layers of fabric? F.Y.I. I'm a total noob when it comes to lasers and integrated ...
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