Which product?

Guest · Post by **Guest** » Mon Jul 27, 2009 8:48 pm

I have a HeathKit weather station that I want to record the output from. It has a 25 pin parallel interface bus connection. It has a clock speed of 720 microsec. At each tick of the clock, it sends a digital code for one of the 15 LED digits displayed on the front and a digital code for the seven segments of the LED. I only need to record the data every 15 minutes but it must be able to read the 720 microsec pulse. I would like a standalone device that records the data internally and then is physically transfered through a USB connection to a PC where the data is analyzed.

Does Pico have a product that meets this specification? Oh, did I say it's got to be cheap?!!

Thanks

Doug

ziko · Post by **ziko** » Tue Jul 28, 2009 3:32 pm

Hi Doug,

Our products do not decode any digital signals and just purely measure a voltage really. If however you wish to write your own software you can achieve this.

I still do not 100% understand your query are you actually trying to decode a digital signal?

Kind regards

Guest · Post by **Guest** » Tue Jul 28, 2009 11:00 pm

ziko,

Thanks for the reply. Yes, I want to decode the digital signal from the 25 pin bus but I can decode it with software if I can get a file where each record is a 25 bit word of voltage values (or can be as little as 14 bits since I don't need all the info contained in the 25 bits) . Each 25 bit word would be the results of the status of the 25 pins during a 720 microsec pulse (results are either zero voltage or a voltage of about 3V). Ideally, I would want to record 15 words consecutively, every 720 microsec and then wait 15 minutes for another series. If I can't record 15 words consecutively, I could gather data over, say 1-2 minutes at whatever rate is possible. However, since the state changes every 720 microsec, the logger would have to be able to read one word that fast.

I hope I haven't confused you more!

Thanks

Doug

ziko · Post by **ziko** » Wed Jul 29, 2009 10:05 am

Hi Doug,

Our equipment just purely measures analogue voltage, the software will only allow you to see the sampled points. So in terms of storing them as words the only way I could see you doing this is sampling at a rate that is sufficiently high enough to be able to capture the shape of your waveform and then doing analysis on it after or during the capture.

Kind regards

Erik · Post by **Erik** » Thu Jul 30, 2009 10:03 am

Hi Doug,

The PL1000 might capture the data for you if it has enough channels.
You would have to write a small application to capture and convert the analogue data from the channels and write this to a file yourself.

Regards,

Erik

Guest · Post by **Guest** » Fri Jul 31, 2009 2:47 pm

Erik,

Thanks for the reply.

Using the search option or scanning the online catalog does not bring up a PL1000. Can you give me a link for it?

What's up with that??!!

Thanks

Doug

Erik · Post by **Erik** » Mon Aug 03, 2009 10:11 am

PL1000 (PicoLog 1000)

http://www.picotech.com/multi-channel-daq.html