- 11
- 85 981
tbg3tbg3
Приєднався 26 гру 2012
Fireworks State College PA July2020
In normal years, State College hosts a 45 to 50 minute fireworks display near the Penn State football stadium. This year, to avoid crowds, the organizers split the show into four parts, with each part launched from a different location in and around town. So there were four 12-minute shows, run simultaneously, and most people could see at least one display from any part of town without congregating.
Переглядів: 226
Відео
IMG 3490
Переглядів 518 років тому
Low-altitude, high-speed pass of Piper PA28-140 at Bellefonte Airport. (Class exercise for ACS516 at Penn State.)
B17 overflight campus short
Переглядів 5010 років тому
Over-flight by a B17. The B17 is a World War II bomber. This airplane is operated by the Arizona Confederate Air Force and was flying from the University Park Airport at Penn State for several days.
Loudspeaker and resonator
Переглядів 68310 років тому
Making the sound from a speaker louder by placing a resonator nearby. The plastic bottle has a resonance at about 260 Hz. When the bottle is held near the speaker, the level increases by about 6 dB, which is 4 times the acoustic power.
piezo demo
Переглядів 81 тис.10 років тому
A simple demonstration of the voltage response of a disk of piezoelectric material to force and to temperature.
Resonator-Enhanced Radiation from a Loudspeaker
Переглядів 32111 років тому
The speaker is driven by a constant-frequency tone. The plastic bottle has an acoustic resonance at that same frequency. When the resonator is placed in front of the speaker, the acoustic output increases. The sound-level meter shows about a 6 dB increase, which is four times the output acoustic power. How does a completely passive device like the plastic bottle result in an increase in real ac...
Airflow in a Ported Loudspeaker - Part 3
Переглядів 30911 років тому
The inflow and outflow are easier to distinguish with the red tufts.
Air Flow in a Ported Loudspeaker - Part 2
Переглядів 85111 років тому
In this video, a strip of thin paper hangs just off to one side of the port. From the action of the paper, it is clear that there is both inflow and outflow from the port. Be sure to also watch the first video in this set.
Air Flow in a Ported Loudspeaker - Part 1
Переглядів 2,3 тис.11 років тому
The ported loudspeaker is a design that extends the low-frequency response of a speaker. Just like a weight hanging at the end of spring, the effective mass of air in the port tube (toward the top of this speaker) and the stiffness of the air in the interior of the enclosure create an acoustic resonance. This resonance is designed to be somewhat below the normal frequency range of the speaker; ...
Development of a wall cloud
Переглядів 5511 років тому
Time-lapse video of an advancing thunderstorm and a developing wall cloud.
Evening sunset wind shear
Переглядів 8411 років тому
Visualizing vertical wind shear from cloud motion. The low-level clouds move from right to left while the higher clouds move toward the camera.
What is the generated current?
Thank you! Trying to fix my guitar hero drum set... and wants to know what these pieces do!!
Can you tell us about the watts produced?
I have searched for many videos on which i can see the voltage and current output connected to dmm and yours is best❤
Thanks!!
The air-flow is completely outward. Is there a theory explaining this phenomena?
I think voltage generated by the vibration, which is created by air blower not by heat. Because if voltage cteated by heat it must take some time to heat up and heat down.
Nice practical explanation sir. Would you tell me ,what are the factors that affects the performance of piezoelectric sensor? and also I have doubt that, can we generate steady electricity by pressing the sensor with constant stress?
thats what i also wanna know.. but that would mean that you could generate constant volts by.. sitting on it?
voltage can not be generated keeping press, have to press n release. but when there will be several discs in parallel n serial, a good useful amount could be generated and use through buck n boost circuit.
heating the disc is more liks bolwing the disc?
Best test
how to trouble shoot that machne can't weld?
good one! thanks
I want to communicate with you if it's possible
Dona
Are you able to collect the electricity and we got enough to recharge our phones and calculator and remote control Are infrared Ray's destroyed the corona viruses How much weight of corona viruses
ues
The one you have is actually very thick! I have one on my table, and it's like 4 times thinner
Tell me plz that energy is possible to charge my mobile phone?????
It is possible to charge a phone but it's less efficient than a solar panel. Very slow. Usually takes way more effort than practical. The US military tested shoe soles to charge gear. They decided it was not useful. Something about the soles taking energy out of the soldier reducing endurance.
I like your multi-meter, what is it called?
Fluke
Do you know a site where i can buy that piezo piece ? It's importante thank's for the video
Output voltage we get by piezoelectric sensor is Ac or Dc?
A piezoelectric sensor has a crystal that produces an AC voltage difference when it is stressed . AC NO DC
MartinMartin Martin looks like dc to me.
Ac
The piezoelectric materials generate a pulse not constant voltage so we can’t depend on it’s reading to determine the load that contact with it
it is possible to produce electricity with air in all piezos what type of piezo ?
If you press and hold down, its voltage will decrease right? because there's no movements between the 2 plates. The releasing action should also generate voltage as there's movement. At least that's what my piezo is doing :/
Leslie Soon j actually had that question in my head. If you press and hold and don't release it , it can't produce voltage and energy ?
Piezo not generate power in constant pressure.
If it goes in, it has to come out!