Any Experts here? Vibration Pulse Device for attracting predatory fish idea..

Sorry I'm not explaining myself clearly.

When I say "spikes narrow enough into the ultrasonic range" that means the rise time <1us beyond our hearing. We only hear the energy < 25us rise time. Bats use these fast rise time clicks for navigation. (but not fishing)

The characteristics of the transformer and transducer changes everything and I did not even see any specs on Rs, SRF or output voltage ( which could in theory exceed Vce_max or at least reach it)

I have no idea if this application works.

The Output Voltage is Quite High and they are Quite Narrow Spikes.
On my Scope it shows about 22 Volt Pulses.

Sounds good to me, but the concept sounds fishy to me.

Next add WD40 as stink bait ( fish oil based) and you might win a Bass tourney. ( if legal)

This Device Does Attract Fish, But that does Not mean the Fish are Hungry for your Bait!

I just remember germaniums, ac127 springs to mind, you could scrape the paint off and make them into photo trannies.

Thanks so much for the info CHEMELEC & Others!! Really appreciate it

I would love if someone could test one of those circuits - im too much of a novice to do it myself.

Just a last couple notes,

It has to work off small batteries and the whole circuit etc must fit inside something relatively small, perhaps cigarette box size. As it will be sealed properly and attached to a weight or something which will be casted into the ocean/river - although for testing purposes this is not important at first.

From scientific research the key is the sound:

-Intermittent (random), low frequency, pulses. Around 25-200Hz. (Not khz or mhz)
-It will have to be irregular pulses,not a continuous tone, lets say 5-12 rapid pulses per second. Random pulses can loop..

Also, see attached file for the study done on above sounds attracting sharks - Look at the simplified figure B displaying the tone used Read a bit on page 2 paragraph 3 where they mention how the sound was reproduced. Sound (I) is the desired one obviously.

Any comments guys?

quentinsaunders1: I would love if someone could test one of those circuits.

quentinsaunders1: Curious, Where do you Live?

In Post 18, I Show this Circuit Actually Operating.
It will operate good using Two or Three AA or AAA Batteries. (So 3 or 4.5 Volts)
(Works also with a 9 Volt Battery, But the battery Won't last as long as the AA ones.)

In the Circuit I Posted, and using a 2N3906, I would change the 5K pot to a 25K pot for better Control of the Frequency.

Reportedly, this works good for normal Fishing, Not sure about SHARKS!

A small piezo of around 7mm diameter worked well enough, I think you could build this very small without too much trouble. Personally I would go with a micro, but I guess you could also use a arduino if you really must, I am sure there will be a bait lure library for that.

there is another board I am trying to find a link too, its small and can record then play back sound, if I find it I will post the link