Search found 8 matches

by brutor
Tue May 27, 2014 9:23 pm
Forum: MicroPython pyboard
Topic: testing pyboard DAC
Replies: 13
Views: 9916

Re: testing pyboard DAC

Hello Damien, Thanks, indeed the 2 DACs are OK now with a timed write. The little DAC test is running now, but strangly I have to shift the Y-points 1 position to the left to get the correct result compared to w2aew's logo. # -*- coding: utf-8 -*- """ Created on Sun May 4 08:05:40 2014 @author: Brut...
by brutor
Fri May 16, 2014 9:55 pm
Forum: MicroPython pyboard
Topic: testing pyboard DAC
Replies: 13
Views: 9916

Re: testing pyboard DAC

@blmorris : - triangle test : the sample rate in the triangle waveform test was only 204.8kS/s (100x2048). The artifacts are visible at all frequencies. - DAC2 problem: DAC2 is working with the dac.write() function, but not with the dac.write_timed() function DAC1 works on both functions. Seems inde...
by brutor
Thu May 15, 2014 7:52 pm
Forum: MicroPython pyboard
Topic: testing pyboard DAC
Replies: 13
Views: 9916

Re: testing pyboard DAC

Hello again, As said I have a nice little project for testing the DAC functions: XY generation of the TEK logo on a TEK 2445 oscilloscope Inspired by w2aew's video : http://www.youtube.com/watch?v=344oEu9vo7w But it's not working out : from pyb import DAC from pyb import LED #import math dac_x = DAC...
by brutor
Thu May 08, 2014 7:40 pm
Forum: MicroPython pyboard
Topic: testing pyboard DAC
Replies: 13
Views: 9916

Re: testing pyboard DAC

It's a Picoscope 5000 series (5444B). An excellent piece of measurement equipment.

I found an interesting little project for the DAC function, will try to work this out over the weekend ...
by brutor
Mon May 05, 2014 9:23 pm
Forum: MicroPython pyboard
Topic: testing pyboard DAC
Replies: 13
Views: 9916

Re: testing pyboard DAC

Some more test results on the DAC : trianglewave generator from pyb import DAC from pyb import LED # turn on a led led = LED(4) led.on() # set the trianglewave frequency (Hz) # sample frequency needs to be 2048 bigger to get the correct result frequency = 100 sample_frequency = frequency * 2048 #out...
by brutor
Sun May 04, 2014 12:57 pm
Forum: MicroPython pyboard
Topic: testing pyboard DAC
Replies: 13
Views: 9916

testing pyboard DAC

Some testing results on the pyboard DAC output : some changes compared to the code example on : http://micropython.org/doc/module/pyb/DAC from pyb import DAC from pyb import LED import math dac = DAC(1) led = LED(4) led.on() buf = bytearray(100) for i in range(len(buf)) : buf[i] = 128 + int(127 * ma...
by brutor
Sun May 04, 2014 8:01 am
Forum: Kickstarter logistics for the Micro Python campaign
Topic: Micro Python board well received in Brussels / Belgium
Replies: 1
Views: 2727

Re: Micro Python board well received in Brussels / Belgium

Hello,

Also received the board well this Friday (02/05)

Excellent piece of work !

It's amazing the speed at which you can get a useful signal out of the pyboard !
Less than 30 min to get the quickstart running.

Thanks,

brutor
by brutor
Sun May 04, 2014 7:48 am
Forum: General Discussion and Questions
Topic: Spambot counterattack
Replies: 28
Views: 13163

Re: Spambot counterattack

Hello I'm no spambot

Regards,

brutor