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0
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0answers
29 views

Use a headphone jack to activate a 'silent' speaker

I am looking for a type of speaker (around the size of a coin) that connects to a smartphone or walkman (for example) which plays silent tones or pulses. Like a miniature speaker that a person can ...
1
vote
1answer
34 views

Connect a vibration motor to a headphone jack

I would like to solve the following problem: I have a a variometer-device for an RC plane. Its receiver has a standard 3.5 mm headphone jack that provides a beeping sounds to my headphones. I would ...
1
vote
0answers
31 views

can I drive 100 or so LRAs with WS2811 controlling DRV2603?

I would like to make a suit with 100 or more individually controllable Linear Resonant Actuators. Texas Instruments makes this http://www.ti.com/lit/ds/symlink/drv2603.pdf which take a PWM as an input ...
0
votes
1answer
72 views

Calculating mV/g of a sensor

I have constructed a piezo-resistive sensor using graphite. I managed to obtain the output voltage of 0-5V by using the ADC of my Arduino to read the sensor. But I have no idea how to calculate its ...
0
votes
2answers
91 views

converting mV to g

I have recently run a vibration test at work using a PCB piezotronics model 482C sensor signal conditioner. How do you convert the the MAX reading (in mV) into the equivalent acceleration (in g). The ...
0
votes
3answers
237 views

Need a fast, sensitive vibration sensor circuit that doesn't jitter

I have been working on a project to take high speed photographs of things like balloons popping. I shoot in a completely dark room and use fairly fast shutterspeeds, but flash is what freezes the ...
0
votes
0answers
52 views

Vibration sensor for butterfly chrysalis

Which sensor to use for detecting a butterfly new born vibration? I need something simple, just with an alarm to warn me when the butterfly is just emerging from its chrysalis.
3
votes
1answer
227 views

How does vibration motor create motion in particular direction?

I am building an autonomous robot for robot swarm reasonably small in size (say 30mm x 30mm). I was analyzing such robot's locomotion and found that coin vibration motors are used widely as opposed to ...
0
votes
1answer
190 views

Accelerometer raw data output to measure vibration,and do a frequency spectrum/ amplitude spectrum?

Ive used an Arduino to measure vibration on a washing machine and have up to 100 raw data out putvalues. I want to present an amplitude/frequency spectrum with these values, i have matlab and simulink ...
0
votes
1answer
46 views

Is there risks or limitations to install driver board under a pinball playfield?

I'm currently designing the electronic for a pinball. I would like to reduce the usual cable mess under the playfield. I'm thinking of creating small driver card that handle small amounts of switch, ...
0
votes
1answer
151 views

Distance sensing with comparator

I want to implement a alert system using a comparator circuit. The circuit will alert the user when he is a certain distance away from an object of interest. The comparator circuit will comprise of an ...
0
votes
0answers
41 views

Vibration Switch [duplicate]

I am looking for a Switch which turns on an Arduino Microcontroller on vibration It has to be a mechanical switch consuming absolutely no power What I found so far: Vibration switch ...
0
votes
2answers
1k views

Stepper Motor rotating but vibrating

So my problem is that I have 3 steppers and using the Accel Library I tried to make them move simutanousley, first of all two steppers move at the same time then a third one continues to rotate, ...
0
votes
3answers
174 views

Multiple sensors off one pin

I have multiple piezo sensors acting as vibration sensors. I am using a PIC microcontroller that only has 2 ADC. I want the circuit to function in such a way that if any of the sensors are hit and ...
0
votes
1answer
256 views

Small Vibrating Motor at Set Intervals

I am looking to create a simple circuit that utilizes a very small vibrating motor such as the one here: http://www.adafruit.com/products/1201#Distributors. I would like the small motor to be powered ...
7
votes
1answer
399 views

What PCB wire termination should I use for high-vibration environments?

I'm designing a system for a high-vibration application. I need to land wires on circuit boards. Someone suggested that I use a Wago cage clamp, and that there might be similar things from other ...
2
votes
3answers
1k views

What is good device for generating vibrations, offset weight motor or solenoid or some other?

I am building a vibrating device for that I am thinking to use a solenoid for vibration. The solenoid will be used such that device will be mounted in the floor and when a stick is put over solenoid, ...
-1
votes
1answer
66 views

Vibrotactile graphic equilizer? [closed]

I'm very new at this, but here goes: I work with adults who are both deaf and blind. I'm trying to basically build a graphic equalizer that has vibration motors instead of LED's. It would be worn on ...
4
votes
3answers
347 views

Vibration Detection bronze keyed instrument

I want to be able to detect when a bronze key (Balinese Gamelan) gets struck by a mallet (hard wood) without effecting the keys vibration, so a piezo is likely out. Example of the instrument: Is ...
4
votes
1answer
2k views

Using Piezo Vibration Sensor with Pull-Down Resistor - Arduino

I'm using a MEAS piezo sensor (this one: https://www.sparkfun.com/products/9196) to detect very slight vibrations, but I'm having trouble selecting a pull down resistor that allows it to be sensitive, ...
0
votes
4answers
409 views

Can I buy a motor that vibrates or pulses very precisely?

I'm trying to make an item with a number of pads that will pulse individually or in sequence with a given signal. I have looked at vibration motors but these are like the ones in video game ...
1
vote
1answer
188 views

I need to sense if a rope has been touched, what is a safe way to do this?

I was thinking of attaching a sensor to the rope but there are so many types I'm not sure which one to use. Pizeoelectric, rolling ball, vibration, tilt and tension sensors could all work. I need ...
2
votes
3answers
259 views

Why don't capacitor's plates stick together?

When capacitor plates carry opposite charges, then why don't they stick together due to attraction? They must stick since the plates have opposite charges.
2
votes
1answer
651 views

Finding a sensor for vibration of impact event, preferably for interface with arduino

Vibration Sensor, I want a really high tolerance, I intend on using this to measure the vibration generated when dumbells are thrown onto the floor in a gym. Because, I have familiarirty with the ...
5
votes
2answers
237 views

What is the most power-efficient way to generate vibration in a small area?

I'm trying to generate a perceptible vibration (as felt against skin) in a roughly 4x4mm area. What's the most power-efficient way to do that?
2
votes
2answers
283 views

Circuit movement detector

I'm looking for some simple schematic for movement detection. I want to use it with a small hobby project of my own to detect if someone is moving the box, doesn't matter the direction. I'm looking ...
2
votes
1answer
621 views

Vibration Measurement using Accelerometer ADXL335

I like to know how to measure vibration in Hz using ADXL335/similar sensor in one axis, With that sensor, after converting digital using ADC, now i have some 8-bit binary value(0-256 in decimal)... ...
7
votes
4answers
7k views

How do I build a bracelet that vibrates once every n minutes?

I intend to establish a few new personal habits that eventually become second-nature to me. To assist myself, I want to wear a bracelet that vibrates every, say, 5 minutes all throughout the day as a ...