Search found 958 matches

by poink
Sat Jan 28, 2017 11:55 am
Forum: off-topic
Topic: why,why,why a fuse
Replies: 12
Views: 556

Re: why,why,why a fuse

the CE label , is not a safety lable , something to do with europa :) "A CE[1] mark is a manufacturer’s claim that its product meets specified essential safety requirements set out in relevant European directives." (gov.uk). The confusion about whether it's a safety mark seems to come fro...
by poink
Mon Jan 23, 2017 5:59 pm
Forum: software
Topic: RISC OS File Manager
Replies: 7
Views: 362

Re: RISC OS File Manager

s1paulr wrote:Attached is a straightforward shareware sector editor called !DiscEdit. Usefully it also supports DOS format discs :)

I believe !Zap (the programmer's text editor) can also do this.
by poink
Mon Jan 23, 2017 12:18 pm
Forum: off-topic
Topic: why,why,why a fuse
Replies: 12
Views: 556

Re: why,why,why a fuse

but why even bother with a fuse, if you can not open the black box a melting wire is cheaper then a wire in a glass box There are different types of fuses for different applications: fuse wire, fuse resistors, glass fuses, ceramic fuses etc.,. There's an increase in cost for the better ones, but th...
by poink
Sun Jan 22, 2017 7:08 pm
Forum: off-topic
Topic: why,why,why a fuse
Replies: 12
Views: 556

Re: why,why,why a fuse

why not use a cheaper resistor You can, but at the expense of predictability. This means you can get away with it in a totally sealed product (like a light bulb - where you're using something like a capacitive dropper anyway), but you probably can't anywhere that you have to be accurate for the fau...
by poink
Sat Jan 21, 2017 3:22 pm
Forum: off-topic
Topic: why,why,why a fuse
Replies: 12
Views: 556

Re: why,why,why a fuse

that is what mostly happens , the only time the fuse blows if there is a fail AC/DC bridge. but because the hole thing is in a black box melted together , the danger is not that great that you can get to a open circuit. Safety...because there's actually significant danger. If it was a part that cou...
by poink
Thu Jan 19, 2017 5:49 pm
Forum: hardware
Topic: !IRC on the master?
Replies: 8
Views: 273

Re: !IRC on the master?

So, any thoughts on this please? Where to start with connections , and is it just too much for a master to do? It's perfectly possible, although, I wouldn't recommend trying to do it all yourself.[1] To do it like 25 years ago, the main problem is the effort writing the Internet stack - you'd need ...
by poink
Thu Jan 19, 2017 5:09 pm
Forum: software
Topic: RISC OS File Manager
Replies: 7
Views: 362

Re: RISC OS File Manager

I doubt you'll find a proper[1] replacement for the RISC OS filer, at least not anything native that's been maintained, although there are quite a few bits of software that enhance it. It's perhaps the most loved part! However, applications that compare directories will exist. From the description, ...
by poink
Sun Jan 15, 2017 8:48 am
Forum: off-topic
Topic: Just a slight bit of track damage...!!!
Replies: 40
Views: 939

Re: Just a slight bit of track damage...!!!

EDIT: or was it hooked up to the mains accidentally? Judging by the wire colours, I think it is for the mains. I'd guess some sort of LED lighting panel. It looks like the mains is being rectified (but not smoothed) and then applied across a chain of LEDs. The disc component is probably MOV for sur...
by poink
Sun Jan 15, 2017 7:37 am
Forum: software: other
Topic: bbc project '80-90 finding subject
Replies: 4
Views: 256

Re: bbc project '80-90 finding subject

The MU had them for User port, don't know what issues though... : According to this page : "One example for those interested in monitoring weather information was the anemometer (wind speed) in the June 1985 issue and the weather vane (wind direction) in October 1986." Speaking of things ...
by poink
Fri Dec 30, 2016 5:18 pm
Forum: off-topic
Topic: stupied,bad eyes or else
Replies: 8
Views: 342

Re: stupied,bad eyes or else

"TIP: Texas Instruments (TI) power transistor, plastic case" so why not TI8231 or TI8406 by Texas Instruments ? (TI)P is for power normal then TI ?? It might well be a TI part. It might have been made by a division that TI closed or spun off and/or it's simply discontinued or renumbered l...
by poink
Fri Dec 30, 2016 2:38 am
Forum: off-topic
Topic: stupied,bad eyes or else
Replies: 8
Views: 342

Re: stupied,bad eyes or else

D2120 2C the first two indicate the material and type of device . 2 is silicon, C is low frequency+low power, S is low power switching. The D2120 is the actual number for the device with of the given material and type. TI is not texas instuments but UN is ?? Purely guessing, TI might use Sn, becaus...
by poink
Thu Dec 29, 2016 9:16 pm
Forum: hardware
Topic: Cheapest way to load floppy images into a BBC Micro
Replies: 30
Views: 998

Re: Cheapest way to load floppy images into a BBC Micro

I already have the adapter, but are you saying I'll still need floppies for this method? UPURS was originally written for doing fast floppy transfers. However, there is UPURSFS, which allows you to use a PC for storage via the UPURS hardware. Given the size of modern SD cards relative to the Beeb's...
by poink
Thu Dec 29, 2016 5:34 pm
Forum: hardware
Topic: Cheapest way to load floppy images into a BBC Micro
Replies: 30
Views: 998

Re: Cheapest way to load floppy images into a BBC Micro

I've been researching this for ages but I haven't been able to find a good solution. I cannot simply write an image to a physical floppy disc as none of the computers in my house have a floppy drive, plus my Beeb also lacks a floppy drive. I would prefer a system without an attached PC, like a USB ...
by poink
Thu Dec 29, 2016 2:07 am
Forum: hardware
Topic: Old 3.5" floppy discs of personal work
Replies: 6
Views: 388

Re: Old 3.5" floppy discs of personal work

Also, it's a good idea to check the drive. Apparently, machines with cooling fans like to pull/push air through the drive bays, so unused drives can accumulate dirt internally, leading to damaged discs. Certainly, reading them into disc images and using them with an emulator seems the best course of...
by poink
Sun Dec 18, 2016 5:09 pm
Forum: off-topic
Topic: smps schematic with pictures
Replies: 14
Views: 487

Re: smps schematic with pictures

duikkie wrote:how do i get ac as power ?

There's usually a voltage supply component with the AC (wiggly line) sign on it.

You don't want a voltage supply at both ends though.

In some cases, you might find a load resistor across on the output helpful (to simulate there being a beeb attached).
by poink
Sun Dec 18, 2016 10:24 am
Forum: programming
Topic: How do you save a screen
Replies: 360
Views: 8380

Re: How do you save a screen

Maybe you are right poink......I mean I don't have to do this on the BBC.... I meant looking at other ways of implementing the palette :) Or...just do it on the Master (given you're using BeebEm, it's not like you need to scour eBay for it), which supports two banks of screen memory you can flip be...
by poink
Sat Dec 17, 2016 11:42 pm
Forum: programming
Topic: How do you save a screen
Replies: 360
Views: 8380

Re: How do you save a screen

Can someone please tell me how I can save a screen to disk (say a mode 2 screen that has been generated) RobC's given the direct answer, however, if you wanted more details, page 362 of the User Guide should be helpful. Note that OSCLI in BASIC allows you to send strings to the operativing system. ...
by poink
Sat Dec 17, 2016 5:12 pm
Forum: off-topic
Topic: smps schematic with pictures
Replies: 14
Views: 487

Re: smps schematic with pictures

duikkie wrote:there must be 5 volt no 0.00 mv

What you've got there is pretty much just a couple of resistors on the negative terminal of a battery. Hence, the reading looks correct; there's no potential difference anywhere (except across the voltage source itself).

somethinglike.png
(4.87 KiB) Not downloaded yet
by poink
Sat Dec 17, 2016 9:05 am
Forum: programming
Topic: Help with Acorn Graphics Extension Rom Hell!
Replies: 25
Views: 912

Re: Help with Acorn Graphics Extension Rom Hell!

BTW I thought the GXR Rom was built into the Master as well...........but not 100% on if there are differences between that and the Rom.....? It sounded like the Master version might be a slightly cut down version, for instance, IIRC the GXR ROM had sprite routines and the Master doesn't. The Maste...
by poink
Fri Dec 16, 2016 9:46 pm
Forum: off-topic
Topic: Raspberry Pi for Kodi media centre
Replies: 14
Views: 756

Re: Raspberry Pi for Kodi media centre

I will get an "aerial man" to make sure I have a good aerial, but after that I don't know what to do. With the availability of iPlayer etc., a good internet connection is probably a better investment than the TV aerial - I've not actually used the aerial socket for a good few years. I've ...
by poink
Fri Dec 16, 2016 9:38 pm
Forum: off-topic
Topic: smps schematic with pictures
Replies: 14
Views: 487

Re: smps schematic with pictures

duikkie wrote:that spice is that free ware ?

There's several free and/or open source versions of SPICE. Very powerful, not necessarily the easiest thing just to pick up and use (as is fairly typical of EDA tools, of course).
by poink
Fri Dec 16, 2016 11:56 am
Forum: off-topic
Topic: smps schematic with pictures
Replies: 14
Views: 487

Re: smps schematic with pictures

Have you tried a design guide? For instance, this one by OnSemi , has both the basic circuits, and the waveforms you'd expect for a working SMPS, albeit without all the filtering and safety components. Per component detail tends to drop off for the full application circuits; but if you want to reall...
by poink
Thu Dec 15, 2016 4:42 am
Forum: hardware
Topic: Model B - MODE 7 character display issue - bit 5 always zero?!
Replies: 19
Views: 839

Re: Model B - MODE 7 character display issue - bit 5 always zero?!

At least it's made in UK. Sorry, but I'm afraid it's not. From the listing, emphasis mine: All our products are responsibly sourced both from trusted ethical partners across the world PLUS (uniquely as an automotive tool brand) our own manufacturing base in the UK. The tools that are made in the UK...
by poink
Mon Dec 12, 2016 8:53 am
Forum: general
Topic: Acorn machines in the movies / TV
Replies: 32
Views: 1508

Re: Acorn machines in the movies / TV

I notice the 3-inch floppies above the 5-inch drive. I know the average props guy may not care of the difference but how, then, did they get the BBC running? Other than the obvious inability to buy commercial software on them, 3" floppies as used on Amstrad's 8 bit machines work fine on the Be...
by poink
Sat Dec 10, 2016 6:37 pm
Forum: general
Topic: Acorn machines in the movies / TV
Replies: 32
Views: 1508

Re: Acorn machines in the movies / TV

I remember one featuring Phoebe (...or at least the case) IIRC in the role of a field video editing workstation. I cannot for the life of me remember the name of the (rather short lived) programme.
by poink
Fri Dec 09, 2016 5:06 am
Forum: off-topic
Topic: Smart meter wireless networking
Replies: 9
Views: 2203

Re: Smart meter wireless networking

I already take steps to economise my power usage, and if I want to know how much power I am using, I'll use a clamp meter connected to a Raspberry PI to log the data. That way, I control it. Or, even easier/cheaper, said Pi connected to a photodiode/URL watching the flashing light on the meter. ( t...
by poink
Tue Dec 06, 2016 6:46 am
Forum: hardware
Topic: White noise and PCB flux cleaner.
Replies: 38
Views: 1155

Re: White noise and PCB flux cleaner.

flynnjs wrote:Martin, nice addition to my various other "cleaned up" schecmatics. Did you do that?

I've usually seen that one attributed to Jason Tribbeck.
by poink
Fri Dec 02, 2016 2:26 am
Forum: software
Topic: MIDI Sequencing software for A3020
Replies: 10
Views: 530

Re: MIDI Sequencing software for A3020

(I remember talking to the author at one of the Acorn shows and saying that I found it difficult to align words with the correct notes. His response was along the lines of "No it's not. If you think you can do a better job, go and do it!" :) ) I remember it being somewhat awkward, but tha...
by poink
Thu Dec 01, 2016 9:20 am
Forum: software
Topic: MIDI Sequencing software for A3020
Replies: 10
Views: 530

Re: MIDI Sequencing software for A3020

That's great - thanks everyone. Anthem looks ideal but it's £70 which is more than the machine cost! I'll keep searching for a free (or happy to make a donation) download. Good deal on an A3020 there then! I vaguely remember Clares Rhapsody 2 appearing on the Kosovo Orphans Charity CD which looks t...
by poink
Wed Nov 30, 2016 5:10 am
Forum: programming
Topic: Fast graphics AND MOS compatible?
Replies: 10
Views: 596

Re: Fast graphics AND MOS compatible?

Thanks :D I own the AUG, so I perhaps should have found the bit where it tells me this, but I've doubtless missed it by reading only the bits I needed to get something working, rather than the whole guide in it's entirety #-o. I think my code tends to assume that (although, it's usually just doing d...

Go to advanced search