Member postings for Speedy Builder5

It may be of great interest to old car enthusiasts who would like to know thickness of paint, underseal etc.

What pressure are those Bernzomatic bottles at ? Quick search on the net says 228psi. Is the gauge on the bottle side or delivery side. If the gauge has been over pressured, then the Bowden tube may have been deformed.

easily done !!

Diving (water) equipment suppliers.

Dave - PM sent

Bob

just as an update, something is making the Arduino re-boot (I think). The field xxx is just a record counter and would range from 1 to 720 for this sample (number of days per month x 24).

Time is taken from the RTC using the function rtc.now() and now.hour(). The record counter is reset on change of the month where a new file is written to the memory card and the record count is re-set back to 1. The only other time it is re-set back to 1 is when the program starts.

I am now inclined to be thinking about the power supply and noise ??

DDHh,xxx,YYYYMMDD,Hh,,t1,t2

2007,348,20220920,07,,7,17,
2008,349,20220920,08,,8,16,
2009,350,20220920,09,,8,16,
2010,351,20220920,10,,12,16,
2011,352,20220920,11,,16,16, This is the record for 20/09/2022 at 11:00. Record counter should be 480 + 11
2011,1,20220920,11,,16,38, False
2011,1,20220920,11,,16,37, False
2012,2,20220920,12,,20,16,
2013,3,20220920,13,,23,16,
2014,4,20220920,14,,25,16,

Ian T, thanks for the post but getting to know the Pico is one thing against using it for the moment and another, is it the DS 18D20 , or the memory card code, the RTC, the LCD ? As Simon 362 says - replace the sensor and for me, its the easier option as I already have one - just need to change the address as the sensor is inside a plastic conduit in the ground, so will be easy to extract it (Ha Ha Note the word Easy !)

Bob

Andy_G, The highlighted values are the hour the reading was taken. As you highlighted, there are several (2 in this case) readings for the same hour, the first is always correct, the second (or more) is false just for the t2 temperatures. I could put a routine in to ignore any repeat reading for the same hour but the question would still remain "Why is it there in the first place"

Martin Kyte's idea would be worth following Ie; substitute known values instead of reading the 18B20 sensors. The problem for me is that the readings are stored in a file on the memory card and I can only see the errors at the end of the month. It would be interesting to modify the code and take readings more frequently over a shorter period of time. BUT, I publish these temperature recordings for our village each month and have a few followers who would not like to miss them! In any case I would have to make a second Arduino with memory card LCD display and a couple of sensors (programmed but not read) and a Real tTime Clock.

I last used BASIC 25 years ago to process EDI invoices and orders from major super markets, I don't think I am going that way any time soon. Although the C language is new to me, I use it at a very basic level and impressed with the power of it but not at the debug level !

To every one else - Its good reading and thank you for your replies.

Bob

I am with you Brian W. A few cards to close family and what we would have spent on the others goes to charity. The problem of giving to charity is that they seem to spend your money on trying to get more money out of you by sending you more cards and calendars, sticky address labels and biros. I DON'T want any of these. STOP IT NOW.

Unfortunately, if I gave cash, the charity can't recoup the tax paid or over here, I can't recoup the tax paid. Our cheques have our address on them, so you can't donate anonymously . If I say STOPIT, it seems to bring even more junk mail. What is to be done ??

Bob

Thanks Robert, a few things to try there. What I don't understand is why I get a double (sometimes triple) read of the sensors, when the code will only read when the hour changes. The hour is compared with the last stored hour value and if different, then the sensors are read. I think that I must have a variable which is getting corrupted (Local as opposed to global perhaps?). I am a blundering coder, but learning slowly !

Bob

I did read that there can be a problem of long cables, but the sensor with the problem is using the supplied 5m cable, so I assumed it was not too long.

Thanks Stuart, when the readings are taken, there is a good reading, followed by one or more false readings

Rec xx Date Hr,, t1 t2 (t1= air temp, t2 = Soil temp- long cable)

0310,17,20220903,10,,18,21,
0311,18,20220903,11,,20,21,
0312,19,20220903,12,,22,21,
0313,20,20220903,13,,26,21,
0314,21,20220903,14,,27,21,
0314,1,20220903,14,,26,36, False read
0315,2,20220903,15,,27,21,
0315,1,20220903,15,,28,35, False read
0316,2,20220903,16,,30,21,
0317,3,20220903,17,,30,22,
0318,4,20220903,18,,30,22,
0319,5,20220903,19,,28,22,

I have an ARDUINO which uses a couple of Dalas DS18B20 "1-Wire" digital temperature sensors for measuring air and ground temperatures. These are read once per hour with the values displayed onto an LCD screen and also written to a Memory Card. A new file is written each month. The unit also incorporates a DS 1307 real time clock.

Power is supplied from a mains fed 9 volt supply ("Wallwart".

Generally the readings are good, BUT 2 or 3 times each month (At different times / days), the ground sensor returns the correct temperature and a second temperature (For the same date / time) which is approximately double (+- 5 or 8 degrees- but never negative) the correct temperature.

I am not aware of power glitches, machine usage at the times of error.

Any idea what may be going on ?

Bob

One rack of Old Holborn my Grandad used to smoke, and a rack in the house courtesy of BEA in flight cigarette tins made of aluminium collected by our old neighbour who was a radio operator on the flights at the time.

Other useful boxes were the outer cases for TK50 mag tape cassettes.

Edited By Speedy Builder5 on 01/01/2023 17:10:34

Is your boiler certificated ? Air testing even at 3 1/2" could be quite dangerous and certainly not recommended. As for the motion work, 100 psi is ample to turn the wheels. What is the boiler working pressure as my 5" runs on a max of 90psi. If this is a new build, then there could be all sorts of problems including very stiff pistons / cylinders. Slight leaks from fittings would not stop the wheels from turning. Do be aware that if you assist the wheels to turn with your fingers, should they flick over with your finger in the way it will do some damage - to your fingers. OUCH !

Regarding the compressor, you will need quite a lot of air, however the wheels (once run in) should turn even at 20 psi.

Things to look at;-

Tightness of piston/bores

Water feed pump and eccentrics too tight

Regulator and passage of air to the valve chest/ piston valves

Timing of valve events

Good luck

Bob

Sorting through the dust and debris of the workshop, I uncovered again a planimeter, sitting in its box, nicely tucked up. I last used it probably 50 years ago to calculate the acreage of a piece of land.

Its a BOWEN & Co (America) model No1100 and the box is impressed U.S.C.E

Lovely bit of kit, plenty on the internet which probably don't sell, but what does one do with them these days ??

Bob

I think I would remove the cover off of the push button switch h and see what is inside.

You need to use the larger iron on the switch (including the bell wire) and smaller iron on the Arduino. By all means, tin the terminals first. No different than large screwdriver for big screws and smaller one for small screws.

One of these could make some interesting knurls.

Knurling machine ?

How deep is your pocket ?

Problem with one time use cylinders is that the council / operator refuse centres refuse the cylinders as they can cause explosive damage to the metal crushers. Our tip refuses out of date fire extinguishers, in fact anything that is cylindrical, unless the top/ outlet has been removed which can be a dangerous occupation !

Preferably run your engine on air to drain injector tubes, water feed pumps etc, and don't forget the hand pump and side tanks if you have them.