Ultrasonic anti-fouling

Thanks for that, by the way when I phoned it was a man I spoke to, so I carefully avoided talking about the cricket!

I hope the kit comes with the drawings, but if not I will get the magazine articles. I can solder OK, but my knowledge of which electronic part is which is a bit sketchy. Resistors and diodes I can identify, but some of the current bits are pure witchcraft to me.
 
Norman_E said:
Thanks for that, by the way when I phoned it was a man I spoke to, so I carefully avoided talking about the cricket!

I hope the kit comes with the drawings, but if not I will get the magazine articles. I can solder OK, but my knowledge of which electronic part is which is a bit sketchy. Resistors and diodes I can identify, but some of the current bits are pure witchcraft to me.
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I have built a few Jaycar kits and their instructions are usually good.(although occasionally an amendment will be published a few weeks later showing diode D7 was shown the wrong way round :( ) They used to have a general guidebook on identifying components soldering etc it may still be on their Australian website.
 
I've been in contact with Jaycar about these kits for several weeks now, as they appeared in their adverts in the electronics magazines before they appeared on their web site. I've referred my contact to this thread, and our concerns over P&P, but when I checked their "UK" site it said that P&P was £20.

Before anyone else orders a kit, let's wait and see if we can get a bulk deal going - I'm happy to organize it. They already give a discount for 5, and P&P is cheaper for a single consignment.

Note that this is a kit and requires reasonable soldering skills, not one for a gas iron!
 
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nigelmercier said:
I've been in contact with Jaycar about these kits for several weeks now, as they appeared in their adverts in the electronics magazines before they appeared on their web site. I've referred my contact to this thread, and our concerns over P&P, but when I checked their "UK" site it said that P&P was £20.

Before anyone else orders a kit, let's wait and see if we can get a bulk deal going - I'm happy to organize it. They already give a discount for 5, and P&P is cheaper for a single consignment.

Note that this is a kit and requires reasonable soldering skills, not one for a gas iron!
Click to expand...


Count me in for a group order to reduce postage. PM me when your ready to act.
 
Magnificent Seven er Six

Well I want two so that I could be the seventh and eighth.

Count me in. PM me when you want some dosh. Dave
 
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Has anyone downloaded the article and tried to obtain the components local.

The PCB looks single sided so should be simple to reproduce. I have not found a reference to the transducers, anyone know of a original/alternate supplier.
 
Ultrasonic antifouling.

I ordered a kit a few weeks ago and will report on what it contains. I notice that Silicon chip also sell a 40Khz ultrasonic cleaner kit. The transducer and the rest of the kit looks identical. to the antifouler. Perhaps the antifouler is substantially the same unit with different software.
I think the transducer comes from Haineitec. It is listed as a 40Khz ultrasonic cleaning transducer.
http://www.google.co.uk/imgres?imgu...632/50W_Series_28_40KHz_ultrasonic_transducer.

If the kit looks any good I have a couple of mates who want to copy it. The biggest problem I envisage is getting or making the transformer. Anyone got any ideas.

For the more technical:- At resonance the transducer looks resistive at about 20 ohm. Siliconchip say the voltage across the transducer can reach 600volt P to P. So off resonance the load must be reactive at several Kohm. How do you design a trans former for this range of load?
 
ultrasonic antifouling

I can't get that link to the transducer to work.

Just go to google images and search for "40khz ultrasonic transducer" then find the one that looks like the siliconchip picture.
 
Rogershaw said:
Has anyone downloaded the article and tried to obtain the components local.

The PCB looks single sided so should be simple to reproduce. I have not found a reference to the transducers, anyone know of a original/alternate supplier.
Click to expand...

I've been considering this option, but I'm waiting for Silicon Chip Magazine to reply regarding the articles - there is always a long delay because of the time difference.

It would certainly be simple to source most components in the UK, and the PCB could be duplicated - perhaps with a few modifications that I'm considering having looked at the firmware. Without the article I'm not 100% sure, but there doesn't seem to be any check on the upper battery voltage (there is a cut-out when it is low). When the voltage is high, therefore charging, it makes sense to run the device at a higher rate.

I'll get back when I know more about the circuit, or get a reply from the kit people.
 
reeac said:
How much delay can a 12 hour time difference create?
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Err ... I emailed this morning, 21.00 their time; they won't read it for at least 12 hours. It is always like this with companies in the East. This is without the fact that it is now Xmas Eve over there and they may be closed until next week.

Bloody stupid Xmas! Let's celebrate the birthday of someone else's imaginary friend.

@Rogershaw: yes, the spec is about the same :)

@crossbones: A transducer acts pretty much as a capacitive load. And from reading a few forum posts, I think the transformer may be DIY wound, which makes it easier to source.
 
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My two kits should be delivered tomorrow, the bad news is that I only know that because I have just been stung for £37.06 VAT and £8 handling charge from Parcelfarce.
 
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