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Hoping that someone can give me some information about the "types" of capacitors should be used in the circuit shown.
the only one`s I can recognise are c7 c8 & c9 (all three with a small + to one end indicate electrolytic type).. and C1 which is a Variable Capacitor, used for tuning the radio.
If anyone has a "junk box" with the capacitors and resistors wasting space (! !).. I would much appreciate them, to "lighten your load".... ( green stamps available for post & packing , if desired,... PM. for address )
As regards the 9volt battery.... I assume that the negative side of the battery would be connected to "chassis" ( earth ) ? ? ?
Thanks for help.
9V plus goes to where it says on the circuit diagram. 9V negative goes to earth as you sur...
9V plus goes to where it says on the circuit diagram. 9V negative goes to earth as you surmise.
The non electrolytic are simply standard low capacitance devices. They come in many forms depending on what you want to do with them. See Wikipedia picture of capacitors. The ones you will probably get are the ones on the left of the picture. For what you want almost any with the right capacitance will do - for higher voltages you have to take that into consideration as well.
Electrolytics (on the right of the picture) are used to give high capacitance in a small package - but have the disadvantage that you have to be careful with polarity( as well as voltage)
The 1-5pf C3 capacitor provides DC isolation while passing high frequency signals.
I help my running club with doing their racing results, but I am stumped by a problem I have discovered in an Excel database. To try to give the slower runners a chance, we 'handicap' all of the runners based on their past performance over the previous 5 years. As I enter the latest results onto this database, it may or may not ask about a runners fastest time in the last 12 months, or the last two years, or the last 5 years (it will want that fastest time and the date). I never know who it is going to ask about, nor which period it will ask about. To be able to answer these questions, I have produced an Excel database that covers the last 5 years, and as we do another race, I add that, and delete the data that is more than 5 years old. This gives me a lot of data to print off each month so that I can look for the answers to those questions. To make it easier, I introduced 6 columns where I had formulae that would hold the answers (time and date last 5 years, 2 years, etc). This works fine, making getting whichever answer easy to find, but the formulae have to be able to cope with cells that have no times in them because the runner didn't run in a race. If a runner hasn't run in any races for the last 12 months, the answers will show as '0:00:00' for the time, and '#N/A' for the date. These start to clutter the printout of the database, so I have been deleting the formulae for that runner for the two '12 months' answers (the 2 years and 5 years answers stay until they in turn go to 0:00:00, etc).
The problem I have just found is when someone restarts running these races after they have been away a long time. There is now no formulae to pick up their new times so my 'answers' have been missing the more recent times for them.
My formulae for the 12 month answers at the moment are as follows:-
Is there anyone out there who could show me how to modify these formulae so that when the first formula comes up with '0:00:00' it shows on the printout as blank, but the formula is still there waiting just in case the runner restarts (ditto for the second formula, except that should be when it comes up with '#N/A'). I want these formulae to show the correct answers when the times are not 0:00:00, etc
Thanks for any help
=IF( MIN(X7:AA7)=0,"",MIN(X7:AA7)) =IFERROR(INDEX($X$2:$AA$2,MATCH(MIN(X7:AA7),X7:AA7,...
The first checks for a zero minimum time and inserts blank into the cell if it finds it otherwise it inserts the Minimum value.
The second will insert a blank if the formula returns an error (#N/A) otherwise inserts the value of the formula.
You might need to tweak things a bit, I am assuming that "no" time is held as zero and formatted as a time. If it's held as a string, then you may need to use something like '0:00:00' as the match for the IF statement.
I have ordered an upgrade from PN copper broadband to PN fibre. I have a PN modem/router on its way, but I happen to already have a Talktalk Huawei HG533 combined copper/fibre unit. Will this work with PN please?
I'm thinking to set the HG533 unit up as a standby unit and maybe have a go at the modified firmware in the PN unit, if I can make sense of the thread in this forum.
I have just discovered - without warning - that Windows 10 Home Group has been removed by the latest update (1803) and now I cannot communicate with my home network. !
How do I set up a network now for four compters on Windows 10 ?
Problem hopefully solved at last ! After a lot of messing around and searching on the internet, I...
Problem hopefully solved at last !
After a lot of messing around and searching on the internet, I finally gave up and tried to just "knife and fork" it. Eventually, I discovered that from the Laptop computer I could actually access the Desktop computer without changing any settings. This I did by using File Explorer and simply entering "\\remotecomputername". That gave me a list of all the drives and the shortcuts on the remote Desktop, all of which I could acces except (ironically) the Desktop folder and the Public folder. (I need to play about with those two to find out why not; maybe a sharing issue).
However, I still could not do the same in reverse - i.e. from the Desktop to the Laptop. After more trial and error, I eventually found that by going to :
Control Panel\Network and Internet\Network and Sharing Centre\Advanced sharing settings, and then expanding "All Networks" and finally unchecking "Password-protected sharing"
I was at last also able to use my network again ! Fingers crossed it lasts and no other surprises lie in store with this latest Windows Update.
What I really cannot comprehend is why MicroSoft removed the HomeGroup in the first place. It was easy to set up and use, it was protected by a one-time password and it worked. There was no warning from Microsoft at all and no proper explanation as to what to do next. I have frankly wasted an entire day on this for nothing. Oh well !
Thanks to everyone who contributed. It gave me somehere to start from.
I am having trouble with the MS Project app for ios (on iphone 7). For some reason, the program crashes frequently when I am opening the .mpp file.
My present phone, a Microsoft Lumia435, keeps reporting that it is charging slowly, and to use the mains charger.... which gives the same report... so..... I am considering going to Carphone Warehouse, and see what upgrades they can offer me for less than a fiver.... ! Yeah I know ... cheapskate.... but this present one only cost me £2.50 from them a few years ago....
I am wondering if there is any other "memory" in the actual phone itself, apart from the memory card with all the numbers on it, (which will be transferred into the new phone) .
If so... is it possible, some way... to "wipe" that memory, before disposal back to Carphone Warehouse, in the "part exchange" process ?
Yeah - you were right to be suspicious about internal memory, as even if you take your memory card ...
Yeah - you were right to be suspicious about internal memory, as even if you take your memory card out the phone could still have your personal details on there.
So do a reset after you're confident everything is backed up, take memory card out first (this is just a precaution, as if it is not in the phone, the phone cannot wipe it!). Then do that reset to clear the internal memory.
I have only used this machine as a straight forward printer, for letters.... until today, when I wanted to scan and print some documents.
Eventually managed it, but only by pressing this and clicking that and making lots of restarts.
The "on screen" instructions are not very good... and the only way I could eventually get a printed copy was by accessing it from an automatically opened email as an attachment. then I had to open the document ( attachment) to print it.. ( I renamed it and saved it as a PDF document in Documents) for future prints ).
Is there a way, to scan and print in one operation... if so... can someone please write me a "noddy`s guide" i.e. step by step, on how to do this... Or even how to allocate the location if it has to be saved first on the computer. so that it is easy to find before using the print options.
@shutter I have the same scanner, and sometimes get as confused as you. The online user menu i...
@shutter I have the same scanner, and sometimes get as confused as you. The online user menu is a (unprintable). Here is my suggestion.
Find Canon Quick Menu short cut and click. On my system a series of icons for various functions appears in bottom
right of the screen, shaped like a set square.
Select Image Garden (should be third down). In Guide Menu choose Scan Option, and you'll see the various choices.
All given on a FWIW, No Refund, Disclaimer of Liability Notice, and without Inside leg measurement. Best of luck!
I have a Windows 10 PC with Outlook 2013 installed. I would like Outlook to start minimised when Windows starts.
Microsoft advise creating a shortcut for Outlook.exe and copying it into the startup folder.....this I did.
Now comes the strange bit.
Upon starting my PC, Outlook starts minimised most times but there were many occasions when two copies of Outlook would start minimised.
So I removed the shortcut in the startup folder and then sometimes Outlook will start up minimised, other times it won't and has to be started manually.
It's not a major inconvenience but a bit of consistency would be welcome.
One of the recent MS updates started this behavior. If Outlook is open when you shut your PC down...
One of the recent MS updates started this behavior.
If Outlook is open when you shut your PC down, it will automatically open when you start you PC again. If it's closed when you shut down, it will not start. This also goes for IE and some other MS Apps.
hi all can anyone tell me how password protect a doc using webmail on here
Here is a technical question for someone who understands wireless technology. Health warning : This has nothing to do with broadband or Plusnet ! I hope this may be of interest to someone.
In my house in France I have an electric robot which cuts my grass constantly. It roams around the garden, nibbling the grass in a random fashion, but has a digital memory so that it knows where it has NOT cut. Its freedom to roam is limited by a wire buried in the ground all around the garden. This wire transmits a wireless signal to stop the robot going out of bounds, and also to guide it back automatically to its charging station when the battery needs re-charging. The robot is quite sophisticated and its memory has many features, including basic programming, a weather / rain sensor, GPS so that it can be tracked by mobile phone from the UK, GSM so that it can be remotely instructed (i.e. "Go Home") by mobile phone, Bluetooth so that it can be "manually driven" and programmed by the mobile phone, and basic settings like how close to the perimeter cable it should cut, zone identification and path back to the charging station etc.
This is the second season during which it has cut an acre of grass up hill and down dale in three zones without major issue. On a couple of occasions, it has tried to commit a sexual offence with a mole-hill or two or got its knickers in a twist with a bramble, which has meant that someone has had to intervene !
However, recently there has been a major issue. Suddenly, for no apparent reason, it has re-set itself to its default settings for some reason. That has meant that it has also lost contact with the base station and the perimeter wire as the frequency among other things has to be set up. There is no obvious explanation but two possibilities come to mind.
In recent years, 400 KV overhead power cables have been installed by EDF in the vicinity with huge controversy, and the nearest pylon is 350 meters away - the cables are not visible as we are in a valley fortunately and there is no line-of-sight. As the electricity is only being exported to Spain from the new nuclear plant at Flamanville in the North of France (Normandy), it is scheduled to be upgraded to 800 KV, and this may have already happened for all I know. This is a classic example of political hypocrisy, as Spain has outlawed nuclear energy but is willing to import electricity generated in a nuclear plant in France ! France is self sufficient in nuclear energy already, and has no need for the new plant in Normandy; however, they have built it to obtain technical development expertise of the latest technology in order to be able to sell their expertise to Eastern Europe as consultants. But they need to find a use for the unwanted electricity, so the Spanish and UK markets are a convenient excuse.
So I am wondering whether there could have been some sort of spike from these cables, either from general use or maybe the switch-over to 800 KV which may have knocked my robot out. So my question is ; Could this be a possibie explanation ?
The other explanation may be a little more mundane. We have a lot of land and a local farmer keeps cows in our field. He uses an electric fence to keep the cows in the field. The fence is powered from the mains supply in my house by a transformer which generates a 10,000 volt electric pulse - dramatic but harmless to man or beast. However, the system does cause interference on my Long Wave radio, which means I cannot listen to the BBC Radio 4 broadcast except by Internet Radio. Therefore, is it possible that this interference may be affecting the robot ? The electric fence is effectively one long antenna !
The fly in the ointment for that explanation is that the robot has worked without this fault for nearly two years, despite having the electric fence operative. However, until three weeks ago, only one of the two fields was being grazed by the cows; this field is about 5 acres. Recently, due to the drought, the cows were moved into our paddock which is only about half an acre, and it was while they were there that the settings on the robot suddenly changed to default. As this paddock is so much smaller than the field, any signal from it would be more concentrated as the electric fence is substantially shorter. Maybe this concentration of signal caused the robot to re-boot ?
In a nutshell, can anyone tell me if either of these explanations are likely to be the cause or would wireless spikes not have this sort of effect ?
Baldrick1 That makes a lot of sense because on the longer run, there are places where grass has g...
That makes a lot of sense because on the longer run, there are places where grass has grown up and is touching the electric fence, thereby presumably again reducing the strength of the pulses due to shorting. On the short run (the paddock) the electric fence has not been in use before this year, and therefore the farmer checked for vegetation before switching to it. If the paddock has a stronger pulse than the large field, it is supported by the fact that since the cows were moved back to the large field two days ago and the fence in the paddock has been turned off therefore, there have been no more issues.
The paddock is only used for a few days a year, because the cows soon graze it bare. However, I have asked the farmer next time he uses the paddock, to leave the electric fence in both the paddock and the large field connected in order to dissipate the current. I will also try different power circuits.
So thanks very much for the advice. Back to broadband issues ......