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by RogerClark
Sun Dec 17, 2017 9:20 pm
Forum: Off topic
Topic: Arduino Based Lightsaber With Light and Sound Effects
Replies: 2
Views: 12

Re: Arduino Based Lightsaber With Light and Sound Effects

@racemaniac I suspect the WAV files must be lower resolution that the ones you are using, and perhaps one sound file at a time. from what I have read in your posts, you are doing a lot if complicated files processing of sounds Edit. I cant see a DAC etc in the BOM for that AVR lightsabre, so the aud...
by RogerClark
Sun Dec 17, 2017 9:16 pm
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: Hello from UK
Replies: 11
Views: 149

Re: Hello from UK

Airline pricing models are hard to fathom..

Its possible that landing fees etc are cheaper here than the UK, though I doubt that would make a big difference

Airspace would be a lot less congested here, so perhaps that saves fuel.
by RogerClark
Sun Dec 17, 2017 9:11 pm
Forum: General discussion
Topic: generator on a timer with an interval of 25 nanoseconds ?
Replies: 9
Views: 149

Re: generator on a timer with an interval of 25 nanoseconds ?

@acronis

You have written conflicting requirements.

You said 25nS interval. Which is possible using he F4 processor.

You also said 1MHz PWM, which is not possible ( assuming 8 bit PWM resolution)

I think you need to explain what you are trying to do, and why....
by RogerClark
Sun Dec 17, 2017 9:05 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 498
Views: 8359

Re: F405 & F411 versions of the BluePill

i think the option of using something like a F103RE or F103RG etc would be interesting as all the F1 core would work, plus it has DAC and SDIO, and this board would have better ADC noise performance
by RogerClark
Sun Dec 17, 2017 11:29 am
Forum: General discussion
Topic: generator on a timer with an interval of 25 nanoseconds ?
Replies: 9
Views: 149

Re: generator on a timer with an interval of 25 nanoseconds ?

Depends on what resolution PWM you need E.g. on the F103, with 8 bit resolution, max PWM rate will be 72/256 = approx 280 Khz is max PWM rate On the F4 with 160 Mhz clock rate and 8 bit resolution PWM that only gives you a PWM freq 625 kHz None of these boards will give you a PWM of period of 1Mhz. ...
by RogerClark
Sun Dec 17, 2017 11:22 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 498
Views: 8359

Re: F405 & F411 versions of the BluePill

AFIK. The Pig-O-Scope code won't run on the F4 because the DMA system is different
by RogerClark
Sun Dec 17, 2017 11:20 am
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: Hello from UK
Replies: 11
Views: 149

Re: Hello from UK

Andy,

You're possible closer to me than you are to the UK, but it depends where in India you are
by RogerClark
Sat Dec 16, 2017 8:28 pm
Forum: IDE's
Topic: STM acquires Atollic
Replies: 13
Views: 216

Re: STM acquires Atollic

actually 8051 (clones) is still loitering around as (rather) cheap *bluetooth LE* dongles :lol: http://www.ti.com/product/CC2541 https://www.ebay.com/sch/i.html?_nkw=cc2541&_sacat=0 and incidentally as well a new fad for sdcc seem to be the stm8s-duino, it seem pretty hot here :) http://www.stm32du...
by RogerClark
Fri Dec 15, 2017 7:07 pm
Forum: General discussion
Topic: generator on a timer with an interval of 25 nanoseconds ?
Replies: 9
Views: 149

Re: generator on a timer with an interval of 25 nanoseconds ?

25 Nano seconds is not 25MHz, it’s 40Mhz

You would probably need to set the clock PLL so the board ran at 160MHz so the timer can have a divider of 4.
by RogerClark
Fri Dec 15, 2017 6:56 pm
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: Hello from UK
Replies: 11
Views: 149

Re: Hello from UK

I agree.. Use a Max232, it’s much safer. Re: Australia I think light pollution is bad in all the major cities, and it would take several hours to drive away from the light. Unfortunately the jobs are in the same places as the light pollution, unless perhaps you can get a job at an observatory locati...