I would like to share this demonstration video of

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Slimy Salamander

New member
I would like to share this demonstration video of my latest project, a vibrating lure:

https://youtu.be/9LeByGdTCKc

First of all I want to point out that the physical shape of this prototype is not my design, I'm still working on my own design.

This prototype is intended to be used with a Roepstok when targeting barbel as demonstrated in this video: https://youtu.be/cmrPQw8QFD4 (Note: A normal lure was used in this video.)

The lure is programmable and if desired can be tuned to play a specific sequence of vibration waveforms, but for this prototype I programmed it to play a sequence of random waveforms with a pause between each sequence.

The lure uses a rechargeable battery that will last for around 40 hours per charge.

The idea is to imitate the vibrations of an injured baitfish and persuade the barbel to go for the kill. The vibration motor also radiate weak electromagnetic pulses that might help the barbel with electroreception.

I developed this lure because I've noticed that barbel sometimes struggle to locate a normal pumpkin seed lure in murky water, they know it's there and are actively looking for it but after a few misses they often lose interest and swim off. This happens because a normal pumpkin seed does not always offer the stimuli they need to locate prey successfully. Another scenario is when wind causes waves on the surface of the water as this will create "noise" that confuse the barbel and then your chances of hooking one diminishes greatly.

This product is an experiment only and it will not be sold commercially. The costs are too high and I don't want to add to our already polluted ecosystem when a lure is lost. I also have my concerns about encapsulating a lithium battery in plastic, because that blocks the emergency vent hole required in a thermal runaway situation. I'll probably make a few for myself and other interested individuals providing they will use it responsibly and understand the risks.

I will field test this prototype soon and will report back on how it performed.
 
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Slimy Salamander

New member
Thank you for the comments, I'm glad you guys find it interesting.



Fishpaste wrote:
Forget the interesting...I love it especially when fishing gets all techy!
Click to expand...

Mmm, should I add bluetooth connectivity to the lure so that one can set the vibration pattern in a smartphone app? Might as well go crazy for the fun of it, haha.
 
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Fishpaste

Sealiner
Slimy Salamander wrote:
Thank you for the comments, I'm glad you guys find it interesting.



Fishpaste wrote:
Forget the interesting...I love it especially when fishing gets all techy!
Click to expand...

Mmm, should I add bluetooth connectivity to the lure so that one can set the vibration pattern in a smartphone app? Might as well go crazy for the fun of it, haha.
Click to expand...
Hell yes maybe I can upload my favourite song... Maybe the cats like a bit of slipknot... ;)
 
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Slimy Salamander

New member
Fishpaste wrote:
Slimy Salamander wrote:
Thank you for the comments, I'm glad you guys find it interesting.



Fishpaste wrote:
Forget the interesting...I love it especially when fishing gets all techy!
Click to expand...

Mmm, should I add bluetooth connectivity to the lure so that one can set the vibration pattern in a smartphone app? Might as well go crazy for the fun of it, haha.
Click to expand...
Hell yes maybe I can upload my favourite song... Maybe the cats like a bit of slipknot... ;)
Click to expand...

That is actually a good idea and achievable because the haptic driver in the lure already supports an analog audio input that vibrate to the rhythm of the music.
 
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Fishpaste

Sealiner
Yoh I like this very much! Im also following this closely. Cats are one of my favourite fish and I fish for them almost every single weekend lately!
 
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tadeo

Sealiner
Seems like we’ll have questions like ,where can I get this song from or what song works best at this place.
Seems crazy…but I’ll do it
;)
 
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Krugel

New member
Coincidence that I got my Blue Marlin 14 Foot calling rod just a couple of weeks ago and are currently in the market for some Pumpkin Seeds etc. Wink Wink!
 
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Dr halibut hoffman

Moderator
Awesome thread and idea slimy.. Watched the video and I am blown away at how novel your idea is, the recharging of the battery by using the wire through as electrodes is genius. Also much respect for being aware of the environmental impact of discarded mass produced powered lures..

All in all, wow!

Edit.. how do you prevent the battery from shorting out in the water with the exposed electodes?
 
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Slimy Salamander

New member
Dr halibut hoffman wrote:
Awesome thread and idea slimy.. Watched the video and I am blown away at how novel your idea is, the recharging of the battery by using the wire through as electrodes is genius. Also much respect for being aware of the environmental impact of discarded mass produced powered lures..

All in all, wow!

Edit.. how do you prevent the battery from shorting out in the water with the exposed electodes?
Click to expand...

Thanks for the compliments.

The charging terminals aren't connected to the battery directly, they go into a charging circuit that offers reverse discharge protection. Basically electricity can go into the lure, but nothing can leak out.

The charging terminals also accept any polarity, so in other words you can switch the positive and negative wires of your charger around without damaging the lure, it will just continue charging as usual.

A standard 9V DC adapter can be used as a power source, because all the charge management is taken care of by the internal charging circuit. The lure can accept up to a 12V DC power source, but I don't recommend more than 9V because the internal voltage regulator's temperature will increase significantly at a higher voltage and cooling may not be adequate to ensure long-term reliability.
 
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Slimy Salamander

New member
I investigated a number of design philosophies for the lure as far as powering on/off and charging is concerned.

I chose magnetism to switch the lure on/off, because it’s reliable, simple to implement and doesn’t take allot of space. Using a physical switch was never an option, there’s a million drawbacks and I scrapped the idea very early on. What I did consider more seriously was using electrodes that will “sense” the presence of water and switch the lure on automatically, but I decided against it for now because of reliability and complexity reasons. The conductivity of water varies greatly and I was also concerned about the effect electrolysis will have on the sensing terminals, they might erode away or oxidize and then become less accurate. Allowing current to flow through water might also scare the fish away and worsen battery-life.

For charging I went with a physical connection and using the exposed line and hook wires made sense, because they are there already and they are conductive. I investigated wireless charing, but it was too complited to get right and the curved shape of the lure will need a curved charging pad as well to maximize effiency. I’m still interessted in this, so might give it another shot for future designs.
 
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Krugel

New member
You would need to use proper Braid for these! Don't want to break off one of these baby's! At least 150 LBS!
 
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Slimy Salamander

New member
I contacted a large international manufacturer of Eccentric Rotating Mass (ERM) vibration motors and Linear Resonant Actuators (LRA) and they agreed to send me one of their experimental LRAs for product testing. It's such a new development that they could only spare me one to sample. I'm looking forward to that, because it's far more energy efficient and reliable than the current ERM I'm using. It's vibrations are less powerful though, so might not be suitable for the large lures I'm making now.
 
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