Forum - Recent Threads

POLL What UV-C disinfection application interests you most?

rscasny — Wed, 20 Jul 2022 13:56:48 GMT

UV-C disinfection is not new, but "touch free" disinfection has gained steam today as the spread of Covid-19, bird flu, and other illnesses are sweeping the globe. The development of UV LEDS, replacing traditional mercury tube UV lights, for disinfecting surfaces and the air, has provided electronic design engineers another way to realize new products. element14 would like to host a webinar on UV-disinfection for the benefit of our members.

[Please visit the site to access the poll]

Are you working with UV-C LEDs for Disinfection? If so, tell me about it.

rscasny — Sun, 19 Jun 2022 19:11:54 GMT

UV-C lamps are being replaced by UV-C LEDs for disinfection treatment purposes. There are many use cases including consumer, buildings, industrial, medical, among others.

Are you working with UV-C LEDs? If so, can you talk about it? element14 is planning on some activities around it. I'd like to get a sense of the community's experience with it. Thanks.

More Medical Oddballs, the Home Diathermy Machine

korn — Sun, 14 Oct 2018 19:27:20 GMT

This is an oddball I wish I still had. I lost it when I moved in 1977. Not for any Medical use but because it would make a great short wave transmitter.... Just needs a modulator...

It was a large beast with two banana jacks on the front panel. There was a timer, plate current meter and a tuning knob. It had some different sized pads you were instructed to place above and below the affected limb. There were some picture of them on a persons arm and thigh.

I remember it had a huge tank coil suspended between two 811 tubes. Thats alone was frightening. I could easily get a few hundred watts of RF out of one of those tubes but to have a pair of them... I saw an Ameritron 811A amplifier at a recent hamfest and that reminded me of this monsters potential.

On the first power up test it crackled a bit so I quickly shut it off. then I shut the overhead fluorescent lights so I could see if there was any arcing. As soon as I powered it up the lights came back on.....

I figured it needed a load So I hooked up the large pad set and searched for a test subject. All I could find were some cold McDonalds fries so why not. I nestled the fry container between the pads and fired it up again. I tweaked the plate cap and then I heard my fried say "Its smoking" I looked all over but didn't see smoke. It was the fries! There was steam coming out from between the pads...

Still cant believe this was actually marketed to home users. I've worked in many hospitals and serviced all kinds of medical equipment. Never did any of it scare me like these monsters did....

Anybody else have experience with these machines?

Relax-a-Cizor, Medical Quackery or Just Ahead of its Time?

korn — Sun, 14 Oct 2018 19:07:52 GMT

Anybody have any "Medical" devices in the attic?

Ever look at how they work?

I used to have a Diathermy machine and a weird high voltage stimulator that used gas filled tubes.

I worked at a hospital and dealt with "Real" equipment but I'm still amazed at what oddball stuff will sell....

I have a couple of Tens devices and never gave them much thought. Never used them either....

Then this thing...

I have this Relax-A-Cizor that I had to open up and have a look at.

The lower section still has the pads so I guess thats off to the trash.....

I opened it up to have a quick look. When I have time I want to put it on the bench and have a look at the output on a scope. While I'm at it I have to try a couple of the new Tens units on the scope. Didn't expect to see tubes. and even branded relax-a-cizor tubes...

Really weird how they use a motor to drive a cam to pulse the outputs. Then again thats how the Old Mercury Cougar sequential tail lights worked so I guess is period correct.....

Simple output controls...

Nothing looks to bad so time to put it on a Variac and see what happens...

Help

jluc — Sun, 29 Jan 2017 15:46:52 GMT

So I have been medically retired from the Army and about to start school to be a biomedical technician. I was needing help selecting a laptop for school. It has to run windows. Any thoughts on the right one for me? Thanks in advanced

mandible angle

shaggy7852 — Tue, 15 Nov 2016 10:28:26 GMT

Hello,

I am planning to design a cutting guide for mandible reconstruction and have read many research papers but couldn't find out how to decide the mandible angles. If there is any how I can get help will benefit many doctors in my country (India).

Electrocardiogram with two electrodes

martinvalencia — Thu, 05 May 2016 10:57:20 GMT

Good day, I'm trying to build an electrocardiogram work with only two electrodes, but I have no reference circuit, someone could help me find a circuit that I can serve as a base.

Thank you very much

Regards

CR1632 (3v) vs. Two AA's

Former Member — Sun, 05 Apr 2015 23:33:30 GMT

Hey,

Kind of a newbie at this, so forgive me if this is a stupid question, but if I've got a small lifeline alert pendant transmitter that normally runs on a CR1632, can I replace it with two AA's? Are there any disadvantages? Do CR batteries last longer, have more capacity than AA's?

On a separate note, if I want to replace the batteries with a power supply, can I use a 5v USB supply or would I have to look for a 3v supply?

Thanks,

Howie

India RoHS IVD Medical device exemption?

Former Member — Tue, 17 Jun 2014 19:01:29 GMT

Does India RoHS have a similar In-vitro medical device exemption until July 2016?

UK Conference to Address Software Reliability

devicedeveloper — Tue, 18 Mar 2014 10:35:18 GMT

UK Conference to discuss coding standards and development tools for the development of software for safety critical and highly reliable systems.

The UK's first "Reliable Software Developers’ Conference" has been announced; a conference that will explore the coding standards, training and development tools that engineers and programmers can adopt for the development of software for safety critical and highly reliable systems.

The Reliable Software Developers’ Conference will be one-day event that will take place in Bristol (May 20^th), Cambridge (May22nd), Manchester (June 2^nd) and Uphall, Scotland (June 5^th).

Http://ww.rsd-conference.co.uk

Need Help on Measuring patients Height using Arduino

Former Member — Mon, 24 Feb 2014 05:06:11 GMT

I am planning to work on a project for low-resource setting that helps the rural medical practitioners to measure a patients height and temperature and I bet arduino is the right tool to use but I don't know where to begin on the height measurement.

medical sensor

Former Member — Sat, 08 Feb 2014 04:21:09 GMT

hello,

im working on fetal movement sensor. what kind of sensor is the most suitable to use for better accuracy?

any idea and suggestion? please share with me. thank you

Biosensors as shields for microcontrollers.

Former Member — Wed, 15 Jan 2014 19:02:38 GMT

I am a student in a Masters of Engineering in Technical Entrepreneurship program. This week my team is working on a very unique project that requires a lot of customer feedback. We need help from those with expertise in biotech, medical device research and development, and molecular biology.

We've been assigned a patented technology developed by a professor at our university. In essence, the technology is a biosensor in the form of a plasmonic interferometer that can be prepared with a multitude of substrates to detect the presence of a number of biomolecules in liquids. Our product idea around this is to package the sensor for prototyping and manufacturing purposes so that it can be integrated in devices used for testing applications in medical devices, food safety testing, and potentially for military and defense purposes. The value proposition of this sensor over other biosensors is that it will be low cost, small in size, highly sensitive, portable, and it gives feedback in real time.

My questions for you are;

Can you imagine devices that this sensor would be used for? (point of contact medical devices? testing devices?)

What companies produce these devices?

As a researcher, why would you be interested in this biosensor?

Do you know of existing technology to which this would be superior?

Since we are very new to understanding this technology, I'm not sure if I'm asking the right questions. Let me know your thoughts! Many thanks!

Electrodes for eeg acquisition

rohitrangwani — Wed, 15 Jan 2014 12:43:51 GMT

I am developing a low cost eeg acquisition project and i am unable to decide whether to chose surface reusable electrodes or disposable ones.

There is large gap in cost of these two.

Which one of them you would recommend and why?

can some one help me how blood sample for different blood groups respond to light

Former Member — Wed, 20 Nov 2013 12:58:33 GMT

Can some one help me how a blood sample for different blood group responds to light?

GE Logiq Book XP (demo)?

Former Member — Wed, 09 Oct 2013 13:57:27 GMT

Hey guys, I wanna ask you about this system. Does anybody work on it. Is it worth buying or is there smth better for less than 20K??? any suggestions where is it better to buy in Europe? Please need detached opinion. Thanks

[Help] Replacing an obsolete Relay

Former Member — Mon, 29 Jul 2013 15:04:15 GMT

Hello Everyone,

This is my first time posting. I am looking to replace an old relay that I don't have a datasheet for. The relay is a Matsushita JY1J-DC12V. Other markings on the relay are AJY2315, 10A, 125V AC, 6A250V AC, Japan, and 30615. My understanding is that Matsushita is now Panasonic and I have found a datasheet for Panasonic JY1J relays but none share the exact same part number. http://www.panasonic-electric-works.com/catalogues/downloads/relays/en_ds_61154_0000.pdf Can anyone help me identify a relay that I can use to replace this old relay? I'm not sure if this is in the right sub-forum but the relay is being used in a medical device so I figured I would post here.

Thanks for your help!

-Metro Ophthalmic

The Controller Project

Workshopshed — Tue, 02 Jul 2013 08:15:27 GMT

A website connecting hardware people with people who need custom controllers

Here's a snapshot of their current forum

And a video explaining the project

www.youtube.com/watch

http://thecontrollerproject.com/

MD&M East 2013

dymaxexpert — Tue, 18 Jun 2013 16:00:21 GMT

Is anyone attending the MD&M East show in PA this week? Our team is off to a good start on Day 1 at booth #3531.

Can sensors on a dental drill and patient be integrated on monitor?

Former Member — Sat, 27 Apr 2013 06:40:55 GMT

I am connecting sensors ie accelerometer,gyro, etc to a dental drill. The bit is 16 mm long and angles out 75 degrees. Sensors can be connected to the mandible or maxillae. The goal is to drill the first osteotomy(hole for the implant) hold the drill in position until a fairly accurate line segment is recorded and shows an a monitor (ideally Bluetooth to an iPad) position the drill in place for the next osteotomy and hold until the second line segment shows a favorable angle.

Question? Can sensor data show a record a line segment at an angle proportional to the drill. Can the be recorded and imprinted on screen while next osteotomy is prepared. Can a sensor on the mandible relate the position relative to drill ideally the segments are perpendicular to drill. Are two accelerometers necessary to plot the drill angle

MD&M West 2013

dymaxexpert — Thu, 07 Feb 2013 16:26:57 GMT

Will anyone be attending the Medical Design & Manufacturing trade show (MD&M West) next week in Anaheim, CA? Representatives from Dymax Corporation will be at Booth 2239.

Someone who can help me in my Startup, I need an electronic engineer or similar.......

Former Member — Wed, 26 Dec 2012 18:53:58 GMT

Seeking or similar electronics engineer who is interested in participating as a partner in startup, I need someone to help me develop an ad-on for iphone that can measure temperature.

Which kind of microphone should I use for digital stethoscope?

Former Member — Thu, 26 Jul 2012 10:16:04 GMT

Hello there.

I'm researching for making a small and mobile digital sthetoscope, I'm doing a few tests with an omnidirectional electret microphone inside a traditional stethoscope but the audio quality is not good enough.

I've designed 2 amplifier stages with x3 and x23 gain and a 4th order Rauch band-pass filter but I still have a lot of sorrounding sounds.

I think a unidirectional microphone or a contact microphone will improve a lot.

I would be very grateful for any help.

Freescale ECG Healthcare Demo based on Tower Kit [video]

GregC — Tue, 10 Apr 2012 15:25:34 GMT

This video shows a Freescale solution that allows the you to measure, record and review their weight and resting blood pressure/pulse and forward that data to a personal, physician or electronic health record.

www.youtube.com/watch

Question regarding EP research device

Former Member — Thu, 05 Apr 2012 18:07:21 GMT

Hello

I am a researcher looking at electrophysiologic properties of ventricular fibrillation. Our lab uses specific cardiac plunge electrodes to check action potentials at different areas of the heart we have a problem. I have new plunge electrodes need to connect them to my box for assessment. I need a connector from a 9 pin male end that is attached to the plunge electrode, with each pin ending in a male connector (example next to the 9 pin electrode) into the box (example shown below). Here are the photos. Attached is the schematic. Does anyone know where i can get this or make this?

Attachments:

community.element14.com/.../electrode-schematic.pdf

electrode schematic.pdf