user6336

Most recent activity

• What are your go-to transistors?

  in Interfacing • 10 years, 8 months

  

  If 40V voltage rating is OK I would give ST "Omnifet" mosfet VNP49N04 a try.
  Besides being in TO220 through-the-hole case (which makes heatsinking a lot much easier) it is pretty well protected against abuse, difficult to destroy unless you roast with continuous overvoltage or reverse high current. Even without a heatsink it would be OK for about 7 Amps. The 3.3V drive should be enough to about 10A loads above that 5V would be better. One thing to watch out for is that unlike normal fets it does require some drive current for the protection functions, so you need to allow for 0.5 mA current. I.e. if you use a gate series resistance 50 to 100 ohms might be a good value. I would not recommend using open-drain output + pull-up resistor with these.
  Available from e.g. Farnell.

• Howto: Building the espruino code

  in Tutorials • 10 years, 11 months

  

  Yes you are right, that was a typo which I actually had spotted but forgot to correct while posting the comment. Unfortunately I had no better luck with the correct board name i.e. STM32F3DISCOVERY . Nor with STM32F4DISCOVERY or ESPRUINO_1V3=1. I copy-pasted the boardname from the makefile just to make sure. All give the same errors.

  asko@asko-desktop:~/Espruino-master$ STM32F3DISCOVERY=1 RELEASE=1 make
  Traceback (most recent call last):
  File "scripts/get_binary_name.py", line 40, in

  print common.get_board_binary_name(board)
  

  File "/home/asko/Espruino-master/scripts/common.py", line 247, in get_board_binary_name

  return board.info["binary_name"].replace("%v", get_version());
  

  File "/home/asko/Espruino-master/scripts/common.py", line 237, in get_version

  return subprocess.check_output(["sed", "-ne", "s/^.*JS_VERSION.*\"\(.*\)\"/\\1/p", jsutils]).strip()
  

  AttributeError: 'module' object has no attribute 'check_output'
  Makefile:300: *** Unable to work out binary name (PROJ_NAME). Stop.
  asko@asko-desktop:~/Espruino-master$

• Howto: Building the espruino code

  in Tutorials • 10 years, 11 months

  

  I have managed to to install Ubunto 10.4 LTS in the Oracle VM, and I have done the steps described in the beginning of this chain. However, when I try to build the project I get the following error message. I'm a newbie to Linux, CodeSourcery and using make so the cause may be quite simple ...

  asko@asko-desktop:~/Espruino-master$ STM32FDISCOVERY=1 RELEASE=1 make
  Traceback (most recent call last):
  File "scripts/get_binary_name.py", line 40, in

  print common.get_board_binary_name(board)
  

  File "/home/asko/Espruino-master/scripts/common.py", line 247, in get_board_binary_name

  return board.info["binary_name"].replace("%v", get_version());
  

  File "/home/asko/Espruino-master/scripts/common.py", line 237, in get_version

  return subprocess.check_output(["sed", "-ne", "s/^.*JS_VERSION.*\"\(.*\)\"/\\1/p", jsutils]).strip()
  

  AttributeError: 'module' object has no attribute 'check_output'
  Makefile:300: *** Unable to work out binary name (PROJ_NAME). Stop.