Questions tagged [vibration]

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9
votes
1answer
1k 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 ...
8
votes
4answers
18k views

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

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 ...
8
votes
3answers
3k views

Is a screw or push-in terminal better for vibrating environment?

I need to decide what connector to use on my PCB to connect low power wires. Among the available options on Farnell/Mouser etc. The price and size are almost similar. I wonder if using a screw ...
8
votes
2answers
1k views

Minimum wire gauge with vibration

I've heard that there is effectively a minimum wire size for vibrating environments. In other words, when designing wires that will experience vibration (in my case, an automobile), it's recommended ...
5
votes
2answers
379 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?
5
votes
1answer
4k 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, ...
5
votes
1answer
303 views

How would you dampen this little quadcopter?

Well, I made a little quad from scratch. From scratch as in from PCB design. After assembling, testing, some coding, it turns out my accelerometers get WAY TOO MUCH vibrations and I can't detect ...
4
votes
3answers
687 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
159 views

Why do vibration sensors use a negative voltage?

I've started looking at some industrial vibration monitoring sensors for a project and it seems like there's a number of brands that use negative outputs voltages. Many are eddy current sensors with ...
4
votes
3answers
2k views

How to detect very hard impacts with piezo?

Normally I'm a software guy, but I've recently decided to try my hand at some electronics projects. What I want to do is make my own impact sensor for target shooting. What I'm picturing is a piece of ...
3
votes
3answers
592 views

Why would an AC motor heavily shake when driven with certain frequencies?

I have an AC motor from an old TCL 160 Boxford NC Lathe, it has three wires named U V and W. I thought that incorparating the original driver to a modern control interface card would be difficult or ...
3
votes
2answers
2k views

How do I find source of vibration from a mechanical source outside of my home?

My problem is vibration from a mechanical source outside of my home. I think I have found the source (machinery at a legal marijuana grow op) and need to prove it to get an injunction at court. I ...
3
votes
6answers
450 views

Seismic sensors?

I notice that there seem to be relatively few seismic intrusion detection systems available as pre-packaged products, so I am wondering about the feasibility of hacking one up. Is it as simple as ...
3
votes
3answers
10k 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, ...
3
votes
1answer
4k 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 ...
3
votes
2answers
355 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 ...
3
votes
1answer
138 views

Quartz Clock Accuracy

Do the vibrations of aircraft engines (or any engine, for that matter) dilute the accuracy of a quartz clock? I haven't done any kind of research or hypothesis testing, though I believe that the ...
3
votes
1answer
135 views

Electromagnetic energy harvesting designing problems

We designed a very simple energy harvester made of a little magnet that moves inside a coil. We have a vibrating environment moving at 12 Hz with 10 millimeters peak-to-peak. Our pcb will be ...
3
votes
1answer
177 views

Determining speed of turbocharger via sound?

There are inductive sensors which can be retrofitted to turbochargers to measure their speed, like this: Examples can be seen here. Installation requires some careful and precise drilling and ...
3
votes
1answer
672 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 ...
2
votes
3answers
639 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
1k 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 ...
2
votes
2answers
154 views

Is it possible to generate different PWM Signals for same duty cycles(e.g. 50%)?

Let us expect we have a duty cycle of 50%. Is it possible to reach that duty cycle with different PWM Signals (waveform)? With different I mean variants in the number and lengths of the "active time". ...
2
votes
1answer
2k 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)... ...
2
votes
3answers
188 views

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 ...
2
votes
1answer
1k 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
1answer
5k views

Arduino piezo vibration measurement circuit

I'm looking for a very simple measurement circuit to measure vibrations with a piezo elment and an arduino device. I want to read positive and negative values. I have this sensor: http://www....
1
vote
2answers
171 views

Creating a vibration device based on bass in audio [closed]

First, I'll admit that I haven't done any real electrical engineering in years so I'm quite rusty. But here's a fun project to contemplate: I'm building a device that "rumbles" with the bass in the ...
1
vote
1answer
100 views

Footprint design for vibration resistance

I have a product that will be subjected to reliability testing (random vibration and thermal shock) and I need to design a footprint for an SMT power inductor that will give the best mechanical ...
1
vote
1answer
565 views

ISO standards test for vibration resistance of electrical equipment

I would like to test some electrical contacts for oxidation wear resistance in indoor environments and in cars including off road vehicles with a lot of vibration. Are there some ISO standard tests ...
1
vote
1answer
2k 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 ...
1
vote
2answers
468 views

How to build a multi LED blink circuit triggered by vibration sensor?

I'm wondering how to build a module just like the ones that are in kids shoes that light up. I've taken a few of these out and would like to make my own circuit but I'm not sure if it is possible. I'...
1
vote
1answer
97 views

Field tests for veryfying stator core laminations loose in 3-phase, 3000 HP motor

We have a 4000 V, 3-phase, 366 A, 3575 rpm, 3000 HP induction motor that is making a modulated buzzing noise. The vibration in the horizontal planes of both bearing housings has increase from 0.1 IPS-...
1
vote
1answer
565 views

Controlling Frequency of a Vibration Motor with Battery Voltage Output

I am looking to operate a Vibration motor at a sustained frequency (40Hz) Please see data sheet as below with an example of a motor. I understand that the best way to do this is to control the output ...
1
vote
1answer
939 views

Piezo vibration sensor board negative values

I have this piezo vibration sensor module from Grove: http://www.seeedstudio.com/wiki/Grove_-_Piezo_Vibration_Sensor Using this sensor and an arduino device I want to measure two things: amplitude (...
1
vote
2answers
392 views

Frequency of motor vibration with different voltage

I'm using a motor shown in the link below. http://www.adafruit.com/product/1201 The product page is not showing the detail of how the frequency of vibration changes with different voltages. I sent ...
1
vote
1answer
696 views

Vibration frequency measurement with a piezo sensor

I have a linear resonant actuator like this one: https://www.gearbest.com/other-accessories/pp_670798.html I need to control its frequency of vibration and for that I intend to use a potentiometer ...
1
vote
2answers
130 views

How to further dampen vibration cascading on piezo-elements?

I'm trying to build an electric xylophone. I want it to be pressure/velocity sensitive so I decided to use piezo-elements to pick up 'hits'. Below is a close-up picture of my setup. So every bar you ...
1
vote
2answers
149 views

vibration sensing circuit doing so great

I have attempted this diagram from here: with one modification - instead of the 4093 circuit ( comparator+inverter+hysteresis gates) I have used a HC14 (inverter+hysteresis gates). Can this be why i ...
1
vote
1answer
196 views

Running an induction motor with flickering DC

Is it possible to run(or at least cause some vibrating movement in) an induction motor by powering it with direct current and turning the power on and off? I am aware that if not switched on and off, ...
1
vote
3answers
2k views

Piezo or vibration sensors?

I see that there're vibration sensors and that piezo can detect vibrations. Which is better (more sensitive) for detecting knocks over a piece of wood? I'm looking for a small package, so I'm only ...
1
vote
2answers
11k 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, ...
1
vote
2answers
347 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 ...
1
vote
0answers
23 views

SMD piezo solution for pressure/vibration sensors

I've been working with piezo discs for simple applications (i.e. detecting touch/knock, where different levels of intensity can be read). For large production, stripping wires and hand soldering ...
1
vote
0answers
97 views

PCB hanging upside down in its enclosure

Would this be a problem in a moderately high vibrations / shocks environment (passenger car interior) ? The screws are 1.8 mm thread diameter, 5 mm long, the PCB being some 90 x 60 mm with nothing ...
1
vote
0answers
71 views

Loud sound and crystal clock,how big problem it is?

I want to use piezo crystal clock in place where loud sounds exist,I worry that it might decrease the performance of the clock,create spurious tones for example. The db level at the clock will be ...
1
vote
0answers
48 views

Rewiring of a vibration sensor

Can I pass the signal of a (iepe) vibration sensor over a shielded twisted pair instead of the recommended coax cable? The signal also needs to travel over 30-meter cable.
0
votes
3answers
2k 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
4answers
844 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 ...
0
votes
2answers
74 views

VME64 vs PCI Bus for vibrating environment

I have to select between VME64 bus and PCI bus and one of the important decision metric is concerned with the connector types used in these buses. My application is in a vibrating environment. I ...