pzw

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About pzw

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  1. Very disappointing that the topic starter hasn't followed up...
  2. 640x480 resolution display

    Wrong connection of the panel flat cable?
  3. 640x480 resolution display

    I guess that means the display is faulty... 😞
  4. 640x480 resolution display

    What happens when you connect the display to a pc? Or maybe a DVD player...?
  5. 640x480 resolution display

    Which display (link / photo?) and how did you connect it? HDMI? SPI?
  6. I guess this is the best thread for my question; Would it be possible to create a sub forum where "generic" electronics questions can be discussed? A lot of questions are posted in the forum / thread of the SBC in use, while in general most questions & answers are applicable to most (if not all) SBCs...
  7. Forgot to mention; easy way to generate pwm is to use a pca9685 chip connected to i2c. Adafruit sells a board with it, and it even has the right resistors installed so you can hook up a led directly...
  8. Since LEDs are current devices, they cannot be easily controlled in the voltage domain. So if you do not want to do pwm control, then you need to do current control. PWM control is a lot easier! You need to use a driver circuit to control your LEDs. That can be as simple as a uln2803 chip, or a complicated current limiting discrete circuit. First figure out what the voltage is you need to control, and the total amount of current. Then we might be able to help.
  9. Can you post a picture of your wiring etc? Usb ports are differential connections which require non-standard wiring to work reliably. You might get lucky using breadboard wiring (DuPont wires) but when it's not working do not assume your wiring is good enough...
  10. Cheap HDMI monitor -1

    Thanks for the info. In the description it states 1024x600... Is that information not correct?
  11. Infrared thermometers need to be setup correctly for the material they need to measure. (Emissivity setting in the thermometer..) See http://www.thermoworks.com/learning/emissivity_table for some real life numbers. Another issue is that they are not measuring a spot, but they are measuring in a cone. Therefore if you are too far away from the surface, then the measurement might be completely wrong since it is not just measuring the point (the laser dot) but also the surrounding area.. The best way to measure temperatures of surfaces is just to use a contact thermometer (thermocouple or PT100 probe)..
  12. The "weird" moves are because the pulse to the servo has a lot of jitter. It is very hard to do time critical processes like servo pulses in Linux.
  13. I used to be a moderator on a big, >30000 members of which about 1500 active, satellite reception related forum in the Netherlands and we found out back then that it did work. Another modification we made was showing a reminder above the text box where the new topic was started... If the tag is just the SBC, and all SBC tags have the same color, the christmas tree might not be so bad... Another suggestion; Would it be possible to create per forum a FAQ sticky post, where a lot of the current stickies are mentioned in...? So reduce the number of sticky posts.. On the support side it might be good to only support the last 2/3 releases of Armbian, and if somebody asks anything about an older release then they just get the advice to update to be able to get support... Just a few random thoughts..
  14. Would it be an option to introduce mandatory tags for the subjects? I am thinking of creating a tag for each SBC which is allowed in the forum section, and possibly a "General" tag for issues with all SBCs... This would maybe force the topic starter to think about the location of the post; if the tag is not available you are in the wrong section. On top of that it would make it a lot easier to filter / search the forum...