Search found 3419 matches

by Elminster
Mon Jun 17, 2019 6:46 pm
Forum: hardware
Topic: Who on here has the earliest Acorn Electron?
Replies: 6
Views: 88

Re: Who on here has the earliest Acorn Electron?

Ditto no longer have Mine but I got it May 84. But never took it apart so no idea what issue it was.
by Elminster
Sun Jun 16, 2019 10:00 pm
Forum: software: other
Topic: Writing basic on Raspberry Pi and converting to .dsd?
Replies: 10
Views: 150

Re: Writing basic on Raspberry Pi and converting to .dsd?

Could do it via UPURS but obvious would need the cables.
by Elminster
Sun Jun 16, 2019 9:44 pm
Forum: acorn atom and system
Topic: Atom 2k18 ?
Replies: 238
Views: 8167

Re: Atom 2k18 ?

If there is enough interest then I would probably take one from a second batch, what was the final approx cost for board and parts?
by Elminster
Sun Jun 16, 2019 8:25 am
Forum: general
Topic: “Send no money now!” — Electron news from 1982
Replies: 8
Views: 218

Re: “Send no money now!” — Electron news from 1982

BigEd wrote:
Sun Jun 16, 2019 6:44 am
It's quite remarkable that they hoped to hit the market for Christmas 1982, and wound up missing the market for Christmas 1983.
Sounds like my gardening projects but with a 6 month phase difference.
by Elminster
Sat Jun 15, 2019 5:49 pm
Forum: off-topic
Topic: Acorn Art Thread
Replies: 779
Views: 51666

Re: Acorn Art Thread

I like this one, real feels like you are speeding along
by Elminster
Fri Jun 14, 2019 6:47 pm
Forum: hardware
Topic: BBC model B with beep of doom
Replies: 10
Views: 272

Re: BBC model B with beep of doom

Any suggestions would be welcome. Should I be looking at buying a logic probe and/or an oscilloscope? Definitely a logic probe first. It is 1/10 price of a scope. And easier and quicker to use. I have a scope but always start with the logic probe to narrow things down a bit. I think the last Beeb I...
by Elminster
Fri Jun 14, 2019 6:30 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 66
Views: 1984

Re: Sold Out: New ROM / RAM Expansion Board for BBC B

How does that work then? Does ebay cover that cost?
by Elminster
Fri Jun 14, 2019 6:24 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 711
Views: 32468

Re: RGB to HDMI using a Pi Zero and a small CPLD

For anyone going to Cambridge, if I remember to take them, I may have some spare boards to give out.
by Elminster
Fri Jun 14, 2019 6:22 pm
Forum: introduce yourself
Topic: Greetings from Scotland
Replies: 11
Views: 182

Re: Greetings from Scotland

Welcome.

The forum is the right place for fixing stuff.
by Elminster
Thu Jun 13, 2019 8:56 am
Forum: hardware
Topic: A blitter for the beeb?
Replies: 85
Views: 7821

Re: A blitter for the beeb?

dominicbeesley wrote:
Thu Jun 13, 2019 12:29 am
And now the z80 socket too...with a z80ish font too

20190613_011643-s.jpg
I like you chip storage system :)
by Elminster
Wed Jun 12, 2019 9:23 pm
Forum: off-topic
Topic: Play with scope XY Mode
Replies: 12
Views: 596

Re: Play with scope XY Mode

As promised the python program to turn x,y coords into jds6600 waveform points that you can stuff in the python code further up the thread to program the jds sig gen with XY pictures. To create xy coords you can go to a site like https://www.mobilefish.com/services/record_mouse_coordinates/record_mo...
by Elminster
Wed Jun 12, 2019 3:42 pm
Forum: hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 367
Views: 23067

Re: Proposed: "The Ultimate Electron Upgrade"

With regards to a company building the board, I had a UK company called Quick-tek make some double sided pcbs and solder the all the smd components including a FPGA chip. The board was sold to people into the Sinclair QL, called the Q68. The end result does look very good. Am I right that these boa...
by Elminster
Wed Jun 12, 2019 2:39 pm
Forum: hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 367
Views: 23067

Re: Proposed: "The Ultimate Electron Upgrade"

daveejhitchins wrote:
Wed Jun 12, 2019 2:37 pm
This may be worth investigating? - at least to see what price we're looking at!

Dave H :D
That video has been in my 'watch this' youtube feed all week as well :)
by Elminster
Wed Jun 12, 2019 12:01 pm
Forum: hardware
Topic: Master 128 and the long slow beep of doom
Replies: 11
Views: 473

Re: Master 128 and the long slow beep of doom

The point of measuring the DC output with the multimeter switched to an AC range, is to see if any ripple can be detected. This test is only applicable when the PSU is connected to a load. The best tool to use for this is an oscilloscope. But a good quality multimeter is also useful. In theory the ...
by Elminster
Tue Jun 11, 2019 9:17 pm
Forum: hardware
Topic: Master 128 and the long slow beep of doom
Replies: 11
Views: 473

Re: Master 128 and the long slow beep of doom

BBC psu can supply 3.5A at 5V, and at a guess, that bulb is drawing 0.75A, so that seems a large voltage drop, but then I haven't tried measuring DC with the AC range before, so not sure what it would give you.
by Elminster
Tue Jun 11, 2019 9:06 pm
Forum: off-topic
Topic: Play with scope XY Mode
Replies: 12
Views: 596

Re: Play with scope XY Mode

Okay converted the static BBC Micro to JDS660 Signal (function or arb if you like) gen waveforms. Python script to load them attached below. I will also tidy up the python script I wrote to convert the x,y points (on a 255x255) grid to something you can load into JDS at some point, i..e the thing th...
by Elminster
Tue Jun 11, 2019 1:09 pm
Forum: hardware
Topic: 1770 wire links
Replies: 12
Views: 177

Re: 1770 wire links

I deny that I have used paperclips and cellotape.
by Elminster
Tue Jun 11, 2019 12:28 pm
Forum: hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 367
Views: 23067

Re: Proposed: "The Ultimate Electron Upgrade"

daveejhitchins wrote:
Tue Jun 11, 2019 12:16 pm
Also note that there are several 0402 (?) capacitors! Although I've been able to handle these in the past I doubt I could now :?

Dave H :D
You just need a bigger magnifying glass, and an electron controlled robotic arm.
by Elminster
Tue Jun 11, 2019 11:58 am
Forum: hardware
Topic: Data Center Discontinued?!
Replies: 13
Views: 379

Re: Data Center Discontinued?!

danielj wrote:
Tue Jun 11, 2019 11:54 am
The beebscsi is probably cheaper (the pcb is smaller and less components) *but* look at dp11s pi zero beebscsi solution. That is much cheaper.
Very true. Also dp11’s has no surface mounts if I remember correctly, another on my list to build at abug in a few weeks.
by Elminster
Tue Jun 11, 2019 11:55 am
Forum: hardware
Topic: Beeb Power Supply Issue
Replies: 28
Views: 1103

Re: Beeb Power Supply Issue

Just a balance of time and cost. Only usually those 3 that go, replacing all of them when you have 10 machines is a pain. Who know maybe after 40 years the others will start going. Acorn Beebs are quite lucky in that they don’t have many electrolytics, some of the other 8bit and 16 bit machine are l...
by Elminster
Tue Jun 11, 2019 11:51 am
Forum: hardware
Topic: Data Center Discontinued?!
Replies: 13
Views: 379

Re: Data Center Discontinued?!

Don’t think any one has built a DC from scratch yet (well apart from Mark at Retroclinic obviously). Lots of beebscsi’s been Built. If you had a beebscsi and a then a gotek, (edit: iPad ate some of the text) as Daniel says, you don’t really need a DC. Of course if you do go ahead and build a DC then...
by Elminster
Tue Jun 11, 2019 11:28 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge 28th - 30th June 2019 BOOKING THREAD - NOW FULL
Replies: 120
Views: 4298

Re: ABUG Cambridge 28th - 30th June 2019 BOOKING THREAD - NOW FULL

Here is a thought.

I have half a table, and plan to spend most of my time putting rosin into the atmosphere, is it worth putting the solders together or spread out, is there anyone who would be driven mad by fume fans or large amounts of steaming tree juice?
by Elminster
Tue Jun 11, 2019 9:48 am
Forum: hardware
Topic: 1770 wire links
Replies: 12
Views: 177

Re: 1770 wire links

I guess to get them as good at the ones you get in the kit you would want to heat shrink some heat shrink in the middle of your resistor leg.
by Elminster
Tue Jun 11, 2019 9:47 am
Forum: hardware
Topic: Data Center Discontinued?!
Replies: 13
Views: 379

Re: Data Center Discontinued?!

Dominic is doing some work on the DC CPLD over here viewtopic.php?f=3&t=17222 he is looking for testers who also have a M500/0
by Elminster
Tue Jun 11, 2019 9:00 am
Forum: acorn atom and system
Topic: AtomSID
Replies: 19
Views: 1728

Re: AtomSID

They work fine in the normal BeebSID as that is what I have. https://stardot.org.uk/forums/viewtopic.php?f=3&t=14803&hilit=swinsid#p207387 Did a rubbish video here https://youtu.be/7f8VqDFEL0E I have another BeebSID somewhere with a real SID in, but never compared them to tell the difference. Regard...
by Elminster
Tue Jun 11, 2019 8:42 am
Forum: hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 367
Views: 23067

Re: Proposed: "The Ultimate Electron Upgrade"

While personally, I would be prepared to have a go at making one for myself (and probably destroy 6 boards in the process) I agree, the BGAs limits the audience who can do it DIY. Perhaps if just the BGAs were preinstalled that would make all the difference. But I wonder that if you are getting some...
by Elminster
Mon Jun 10, 2019 10:55 pm
Forum: hardware
Topic: Data Center Discontinued?!
Replies: 13
Views: 379

Re: Data Center Discontinued?!

USB storage option is Gotek.

DC is now open source, Mark used up supply of Xlinix chips DC was based around, and wasn’t worth re-engineering as he now sells lots of gotek.

Updated hardware list a while ago.
by Elminster
Mon Jun 10, 2019 9:37 pm
Forum: off-topic
Topic: Play with scope XY Mode
Replies: 12
Views: 596

Re: Play with scope XY Mode

Python script to load Christmas tree into JDS6600 sig gen.

Merry Christmas
by Elminster
Mon Jun 10, 2019 9:18 pm
Forum: introduce yourself
Topic: Hello from Basingstoke, England
Replies: 11
Views: 230

Re: Hello from Basingstoke, England

Welcome to the forum. You start with one master and then the collection just expands.....
by Elminster
Mon Jun 10, 2019 8:33 pm
Forum: off-topic
Topic: Convert master psu to bench psu
Replies: 39
Views: 1576

Re: Convert master psu to bench psu

Looks like the passive power resistor I got https://stardot.org.uk/forums/viewtopic.php?f=41&t=5594&start=5190#p239537 works 58187567406__4D8FF541-1790-4369-99D4-38750F2EAD1C.png I could never get the electronic active to eat all that power. Can do some testing at higher powers now, also removes any...