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May 18, 2024, 12:23:11 am


SMF - Just Installed!

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Messages - Andy Brown

General discussion / Re: All OK, Andy?
March 15, 2018, 04:31:35 am
I'm here, just rather busy at the moment that's all. Thanks for the concern though!
Hi Tonn,

C20 (100n) and C21 (10n) are really for the M100 - take a look at "M100 - M200 Test Circuit" in the M100 datasheet. It's just a happy co-incidence that together with C18 (1u) the 3 of them are capable of providing decoupling across a wider range of frequencies than just a single one could provide.

General discussion / Re: Cheap PCB production
September 20, 2017, 11:25:36 am
Hi Ricky. I've also noticed that with the 4-layer boards. I think I read somewhere that they go to a different manufacturer but I've never seen that confirmed. I only wish they'd fall in price like the 2 layer boards have done.
I've just published a new article describing how I built a temperature sensing board to compliment the earlier relays and triacs board.

Now that I've got sensing and switching I can mount these two boards inside a PC case and get working on the middleware software. Here's a picture of both the boards ready to mount in the case.

Hi, interfacing a 3.3V (or lower) STM32 to a 5V Arduino is best achieved using the I2C bus.
General discussion / Re: HELP Nokia 6280 LCD
August 08, 2017, 01:16:43 am
Official information is not available. You only know what you can find out by reverse engineering.
General discussion / Re: HELP Nokia 6280 LCD
August 06, 2017, 11:08:23 am
Hi Rahmon,

Don't believe everything you read on the internet. In my experience I've found that these kind of displays don't bother to implement the commands that the phone will never use. Perhaps this is to save money. You may have found one of the commands that simply doesn't work on that display.
You should be fine with all 55xx quad-core CPUs. You will run into problems if you try the hex-core 56xx CPUs. People are reporting that most problems are with dual-CPU combinations and you can probably use a single hex-core CPU without any problems.

Do you have a particular upgrade in mind?
Hardware projects / Re: Z800 Compatible RAM
July 24, 2017, 02:08:36 pm
Quote from: Paul1966 on July 22, 2017, 09:17:57 am
Hi All
1st Post !! :-)
I have 6 X Samsung 4rx4 PC3L-8500R-07-11-AB1-D3  (Planet First)
which POSTs passes memtest86
runs ubuntu
but fails to boot win 10 64bit (pro)(clean install)
does anyone have any ideas
as I'm so stuck.....

Hi Paul, does your configuration match one of the supported configurations in the "HP Z800 Memory Configuration and Optimization" PDF? If it does then I'd try as many of the other supported permutations from the table in that guide as possible. I guess from the fact it works in memtest86 that the sticks themselves are in good order and are supported by the underlying hardware and it must be something to do with Windows.
I think the destroyed part is probably an OnSemi NTD4809N - photo attached of the same part on my V2 board. I'm not sure about that residue on some of the other parts. My first reaction would be to say that its stuff that was thrown out by the explosion but it looks from your photo like those parts were shielded from the blast by one of those inductors or maybe more things have exploded than we can see here.
Quote from: bobdj_Z800 on June 28, 2017, 09:50:22 am
Unfortanely long before Andy's great article I started hacking my Z800 in its own case.
I had a problem with the loud sound of the machine when I bought it. I like very quiet machines.


Does anybody have a suggestion for lowering the speed of the fans.

Hi, have you tried setting up a SpeedFan profile? Instructions here:

I've built the first controller board in my process automation series and done the usual full writeup of the design and build process. Click here to read it.

Your oven is super-accurate throughout the whole profile, better than I've ever achieved and I thought mine was good. I particularly like the way that yours heats from the top and bottom at the same time. Best reflow oven I've ever seen, well done!
Quote from: msilveira on April 22, 2017, 11:43:55 pm
Quote from: Andy Brown on April 23, 2016, 12:51:51 am
Quote from: lvoigt on April 20, 2016, 03:09:43 pm
Can anyone help me with determining what temperature sensor is used in Z800 (thermistor) power switch/speaker cable assembly?

Hi, Check out this post further back in the thread.

Hi Andy, I think the url reference is invalid.

Yes it's invalid. It's Attilio's post on page 11.
I've just done a write up and video that explains how I've made a case for my Artesyn NXA66-based PSU controller board.

Click here to read all about it.