Acoustic magnetic generator.

[tim123]

I cannot visualize the arrangement, though. 
Please make a drawing including the magnetization direction of the magnets.

Hi Verpies,
  I found the magnets made little difference, if any, to the output of the coil. I removed them in the end...

2 Pics attached -
a) Coil on Piezo - no magnets
b) Coil on Alu sheet - flat-plate cap - also no magnets

Both arrangements gave the same results. Which led me to conclude that the signal I was seeing was due to capacitive coupling - and not acoustic stimulation...

Regards, Tim

[tim123]

If anyone know of any signal generator circuit or I/C which uses less than 100uA current and able to produce around 18khz.Please do advise me so that i'm able to demonstrate a close loop system to blink led forever at least.

Hi Magpwr,
  you can't use a multi-meter to measure HF... It won't give you accurate results. You have that super-duper Rigol scope there - why not use that?

Once again - another application for Verpies digital HF wattmeter... It'll be good when it's done.

Regards, Tim

[magpwr]

Hi Magpwr,
  you can't use a multi-meter to measure HF... It won't give you accurate results. You have that super-duper Rigol scope there - why not use that?

Once again - another application for Verpies digital HF wattmeter... It'll be good when it's done.

Regards, Tim

hi tim123,

I know the multimeter do have it's limitation especially at low current.Hence i use 1.2kohms at signal output adjusted near 5 volt voltage peak since it's 5volts supply for my cheap and reliable signal generator.
0.5 micro Amps x 4.5volt at input = 2.25uW estimated output power achieved 4.5mW

Led can't be lit from the output of bifilar coil if the signal generator is connected via resistor to the input coil since there is no amplification without the barium titanate.
The input current to bifilar coil is at 1.83 mA via 1K2Ohms resistor without barium titanate as shown in the final part of the video.

I have also proven there was no amplification from bifilar coil regardless of applied freq 1khz....100khz in the first part of video.

[tim123]

Hi Magpwr,
  I think I bought some of the same barium titanate off that guy on ebay...

TBH - I couldn't actually hear much of what you said in the vid... You did whisper. lol.

It's certainly interesting... You should get an increase in voltage over the supply - because it's a series tank circuit. That might account for the LED lighting up.

Can you measure the input power to the sig-gen? That might be interesting - does it increase under load etc...?

You can get These DDS modules for about $5 on ebay - easily(ish) programmed with an arduino (for example).

The datasheet says it uses "155 mW @ 110 MHz (3.3 V)"

Regards, Tim

[tim123]

I think that in order to affect the electron's orbits in a magnet - using sound - you maybe need 2 or 3 dimensions of compression waves - i.e. piezos in 3D. Also, the frequencies would have to be modulated to produce the precession / wobble required...

Do-able, but not easy. How did Keely do it? And without using electrics?

Maybe you could use 2 near frequencies - and the 'beat' would be the output oscillation. Like a heterodyne... So 2 facing piezos with slightly different frequencies - either side of the electron's resonant frequency...?