This forum uses cookies
This forum makes use of cookies to store your login information if you are registered, and your last visit if you are not. Cookies are small text documents stored on your computer; the cookies set by this forum can only be used on this website and pose no security risk. Cookies on this forum also track the specific topics you have read and when you last read them. Please confirm whether you accept or reject these cookies being set.

A cookie will be stored in your browser regardless of choice to prevent you being asked this question again. You will be able to change your cookie settings at any time using the link in the footer.

Three phyphoxphones and superposition
#14
(11-03-2021, 09:40 AM)Erik Josefsson Wrote: Meanwhile, can I ask about the HiFi headphone amplifier you used? This is a bit beyond where my learning curve ended when I studied (basic) circuits, but I wonder 1) if that amplifier would be powerful enough to pull a 35 gram neodym magnet (see picture) hanging in a spring into a forced oscillation? and 2) Do you think you could force a spring to oscillate with frequencies as a low as 1-2 Hz if you used phyphox's MULTI TONE GENERATOR (e.g. 440 and 441 Hz)? Obviously you would have to connect an iron core electromagnetic coil of reasonable size to the headphone amplifier instead of headphones. And be careful with distance etc.

Dear Erik,

I add a pdf file with all what I know about the amplifier. It is very useful when the generator has a high internal resistivity. But I do not think that it will work at 1-2 Hz, it is a sound amplifier.
You could use multi tone generator if you would add diodes and will keep only the envelope of the signal (4 diode bridge). Your resonance project is very useful and it would be great if it will work so using only smartphone with some minor addition. But I have not tried yet the forced oscillations of the spring with a mass. A headphone amplifier should be useful also to preamplify the smartphone signal before passing it to the diodes...

Best
Mikhail


Attached Files
.pdf   HiFi_Headphone_Amplifier_Proster_DAC038_User_Manual(scan).pdf (Size: 288.36 KB / Downloads: 129)
Reply


Messages In This Thread
RE: Three phyphoxphones and superposition - by solid - 11-03-2021, 11:26 AM

Forum Jump: