I found (Possibly) A BBC micro weather station unit

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comrat4567
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I found (Possibly) A BBC micro weather station unit

Post by comrat4567 »

Hi,
You may not remember but I posted a while back about a BBC micro that sat for years as a weather station, well into the 2000s. The building that it lived in is being demolished this week and I thought all chance of finding the weather station kit was gone but I thought I would ask the foreman anyway. As soon as I said BBC micro, he got his Hi-Vis on and escorted me through a demolition site (Pretty cool).

I found it, just the box mind you but I found it (See photos) It was still connected to an ancient weathervane but I couldn't have that as it was on the roof :lol: . The foreman helped me rip apart bits and bobs to see if I could find any more stuff but we couldn't

Anyone ever seen this before? Is it even a BBC micro piece of kit? I assume it connected to the analogue port but I am not certain.
I have never heard of MJP Geopacks before. I have not yet found any software for it. If it isn't a micro compatible device I will be very embarrassed :oops:



My work Onedrive with the photos (I hope this is OK)

https://saintgeorgescofeschool647-my.sh ... w?e=8RpJcQ
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danielj
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Re: I found (Possibly) A BBC micro weather station unit

Post by danielj »

Excellent find - looks like C4CH has some stuff:
http://www.computinghistory.org.uk/det/ ... r-Station/

d.
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flaxcottage
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Re: I found (Possibly) A BBC micro weather station unit

Post by flaxcottage »

Nicely, nicely. =D>
- John

Check out the Educational Software Archive at www.flaxcottage.com
comrat4567
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Re: I found (Possibly) A BBC micro weather station unit

Post by comrat4567 »

danielj wrote:
Tue Nov 23, 2021 12:32 pm
Excellent find - looks like C4CH has some stuff:
http://www.computinghistory.org.uk/det/ ... r-Station/

d.
Thank You :D

I have contacted them but it seems they may have just about the same amount of information as I do lol. I have offered some photos for their archive too. The issue I have at the moment is that the actual instruments look to be unique to the box which worries me. Do you know if those types of instruments are universal? In that could I make or retrofit some existing cables and instruments to use with it?
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lurkio
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Re: I found (Possibly) A BBC micro weather station unit

Post by lurkio »

comrat4567 wrote:
Tue Nov 23, 2021 11:57 am
My work Onedrive with the photos (I hope this is OK)
Attaching the photos here for the record, if you don’t mind? If you'd rather I hadn’t, then please let me know and I’ll delete them.

IMG_20211123_111423.jpg
IMG_20211123_114132.jpg
IMG_20211123_114505_1.jpg
comrat4567
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Re: I found (Possibly) A BBC micro weather station unit

Post by comrat4567 »

lurkio wrote:
Wed Nov 24, 2021 10:32 am
comrat4567 wrote:
Tue Nov 23, 2021 11:57 am
My work Onedrive with the photos (I hope this is OK)
Attaching the photos here for the record, if you don’t mind? If you'd rather I hadn’t, then please let me know and I’ll delete them.
No, that's perfectly OK :D I wasn't sure how to upload images so I just linked my work onedrive.

Thank you for doing that.
darren-s
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Re: I found (Possibly) A BBC micro weather station unit

Post by darren-s »

comrat4567 wrote:
Wed Nov 24, 2021 10:16 am
danielj wrote:
Tue Nov 23, 2021 12:32 pm
Excellent find - looks like C4CH has some stuff:
http://www.computinghistory.org.uk/det/ ... r-Station/

d.
Thank You :D

I have contacted them but it seems they may have just about the same amount of information as I do lol. I have offered some photos for their archive too. The issue I have at the moment is that the actual instruments look to be unique to the box which worries me. Do you know if those types of instruments are universal? In that could I make or retrofit some existing cables and instruments to use with it?
That looks an interesting find - and I'd also guess it connects up to the a/d interface. It should in theory be possible to come up with some instruments to connect up to it to try and get it working again. It may need some tracing from the sensor connectors through the interface board and the a/d converter to get an idea what the interfaces were expected to be supplying. I'd go for the temperature first which should be easier - I'd guess at it using a thermistor - it may be tricky to find the right resistance - temperature. Looking at the software may give some clues if that provides any ways to calibrate ......
johnkenyon
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Re: I found (Possibly) A BBC micro weather station unit

Post by johnkenyon »

The black block thing is for air pressure/barometer (don't blow directly into either port or you'll break it)
The LM2917 is an F to V converter (=rev counter) for wind speed (the wind speed input should be pulsed, e.g. a magnet operating one or more reed switches).
That'll consume two ADC channels. I guess the other two will be temperature (thermistor or a TO92 bodied IC which outputs 1mV per degC whose part number escapes me) and maybe humidity (one half of a "wet bulb thermometer"?)
comrat4567
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Re: I found (Possibly) A BBC micro weather station unit

Post by comrat4567 »

johnkenyon wrote:
Thu Nov 25, 2021 3:15 am
The black block thing is for air pressure/barometer (don't blow directly into either port or you'll break it)
The LM2917 is an F to V converter (=rev counter) for wind speed (the wind speed input should be pulsed, e.g. a magnet operating one or more reed switches).
That'll consume two ADC channels. I guess the other two will be temperature (thermistor or a TO92 bodied IC which outputs 1mV per degC whose part number escapes me) and maybe humidity (one half of a "wet bulb thermometer"?)
Hmm, all three of those inputs use two of the three pins, 1 and 3. I am worried that, while I have the box now, it is useless until I can find a compatible set of instruments but my knowledge of that is slim. I will keep trying to get the old instruments but they will be damaged when the roof is removed but they have been on the roof since 93 by the sounds of it so they will be worse off even if they do survive. I cannot find any information about this company or the product, only that they were possibly based in Cornwall in Penzance and they did business over in the states but only as a reseller.
comrat4567
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Re: I found (Possibly) A BBC micro weather station unit

Post by comrat4567 »

darren-s wrote:
Wed Nov 24, 2021 4:22 pm

That looks an interesting find - and I'd also guess it connects up to the a/d interface. It should in theory be possible to come up with some instruments to connect up to it to try and get it working again. It may need some tracing from the sensor connectors through the interface board and the a/d converter to get an idea what the interfaces were expected to be supplying. I'd go for the temperature first which should be easier - I'd guess at it using a thermistor - it may be tricky to find the right resistance - temperature. Looking at the software may give some clues if that provides any ways to calibrate ......
I will need to get the beeb working again, I need to send the PSU off to mark at retroclinic to repair. Ideally, I would like the original instruments but they will most likely be destroyed when the roof comes off. Even if they do survive and the foreman lets me back into the site for them, I reckon 30 years of British weather will have taken its toll on them. It saddens me really. I may only be 22 but I can appreciate the work this thing did and the engineering behind it but there is no record or anything of this instrument or even a manual. :( I would be interested to know if anyone even has one of these still. It will be an amazing project if I can get it working again and my school has already said I can fit it into one of the new buildings for kids to look at.
comrat4567
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Re: I found (Possibly) A BBC micro weather station unit

Post by comrat4567 »

Hi guys,
An update, here are the instruments. Note that the wind speed thingy is missing. I am not sure how long ago that fell off. Probably during storm bob or something :lol:

I still want to try to get the foreman to take the chimney down first so I can see if the instruments survive
IMG_20211125_111703.jpg
IMG_20211125_111653.jpg
IMG_20211125_111646.jpg
IMG_20211125_111641.jpg
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