Search found 1578 matches

by ahull
Mon Sep 18, 2017 3:53 pm
Forum: Off topic
Topic: "New" "Multimeter"
Replies: 6
Views: 84

Re: "New" "Multimeter"

@Pito - a mate of mine at school had an Avometer (An ex/surplus Post Office Telephones model 8 if I remember correctly), but that was out of my price range at the time. They are now worth more than they were then. Perhaps I should have invested in old Avometers, couldn't have done any worse than my ...
by ahull
Mon Sep 18, 2017 3:44 pm
Forum: Off topic
Topic: "New" "Multimeter"
Replies: 6
Views: 84

Re: "New" "Multimeter"

The first multimeter I had, was a made in china number from the late 1970s, the strange thing is you can still pick up an almost identical device today. http://i.ebayimg.com/images/g/ueoAAOSwNw5ZicYq/s-l1600.jpg They appear to be even cheaper now than they were when I bought mine (and probably just ...
by ahull
Mon Sep 18, 2017 2:19 pm
Forum: Off topic
Topic: "New" "Multimeter"
Replies: 6
Views: 84

"New" "Multimeter"

OK Its not new, since it was produced in 1944, and describing it as a "multi-meter" is a slight exaggeration as it only has two ranges, 0 to 250V DC and 0 to 15V DC. I saw it lying in a box of junk at a car boot sale, and decided it was worth a quid, so I now have yet another multimeter. https://lh3...
by ahull
Sat Sep 16, 2017 7:53 pm
Forum: Ideas & suggestions
Topic: Differential ADC (ADC1-ADC2)
Replies: 5
Views: 140

Re: Differential ADC (ADC1-ADC2)

I wonder how "white/pink" the noise is. Given that most of it is likely to originate from the digital domain I suspect it pretty non-linear, and it may be possible to suppress it to some degree if we know what sort of spectrum it has.
by ahull
Thu Sep 14, 2017 12:15 am
Forum: Projects
Topic: Repair DIBAL M350 by using STM32F103
Replies: 2
Views: 108

Re: Repair DIBAL M350 by using STM32F103

RogerClark wrote:
Wed Sep 13, 2017 10:03 pm
Very cool...

Thanks for sharing..

(Its possibly something Hackaday would be interested in)
+1 Definitely something Hackaday would be interested in.
by ahull
Fri Sep 08, 2017 9:02 pm
Forum: Code snipplets
Topic: 100 kHz PWM signal with complementary signal
Replies: 4
Views: 140

Re: 100 kHz PWM signal with complementary signal

That looks like yet another neat trick I wasn't previously aware of. Thanks for sharing. :D
by ahull
Thu Sep 07, 2017 2:18 pm
Forum: General discussion
Topic: New to STM32 and projects on it
Replies: 17
Views: 281

Re: New to STM32 and projects on it

davemorl wrote:
Thu Sep 07, 2017 12:47 pm
I think this will be advisable with almost 25,000Nm of calculated torque.
:o You certainly don't want that much oomph pinging lumps of metal round the workshop.
by ahull
Thu Sep 07, 2017 11:23 am
Forum: Projects
Topic: Video text overlay
Replies: 11
Views: 310

Re: Video text overlay

The code from The Artekit project looks to be well documented/commented, it uses three timers and DMA, so it should provide some pretty robust timings and quick updates. I've pasted the video.c code below so you can see what I mean. /******************************************************************...
by ahull
Thu Sep 07, 2017 10:26 am
Forum: General discussion
Topic: New to STM32 and projects on it
Replies: 17
Views: 281

Re: New to STM32 and projects on it

I'm probably over thinking the problem, and this idea may not work in an environment where there is a lot of other metalwork around, but if you are looking for a sealed sensor that can accurately measure relative angles, then a digital compass like the HMC5883L might be adaptable to your needs. My e...
by ahull
Thu Sep 07, 2017 9:49 am
Forum: Projects
Topic: Video text overlay
Replies: 11
Views: 310

Re: Video text overlay

.. and this is where things get interesting.. :D I'm no expert on the registers of either device, but others here no doubt will be able to advise. How I would suggest you tackle this is sit down with a big ruled notepad, and go through the existing ATMEL code taking notes of what each routine does. ...