Crustacean

Member Since: November 18, 2010

Country: United States

Profile

Languages

C, C++, Java, Assembly

Universities

Grand Rapids Community College, Hope College

Expertise

Microcontrollers, Soldering really small stuff,

Interests

HAM radio, electronics, microcontrollers, robots of doom, and sailing

Websites

www.brig-elec.com

  • OK, I have been fiddling with this Pi3 off and on for a while. Originally I was using the 7" touch screen sold from Sparkfun. That works but the software I am trying to use wants a slightly higher resolution. Also, the touch screen is less than optimal for software that is not designed for touch screens. Not a fault of the Pi or touch screen. The elements that allow you to interact with the software are too small to touch with either a finger or stylus. Anyway, I tried buying a couple of HDMI screens. One came from Amazon and was pretty much junk on arrival, the built in speaker had come loose in shipping. That screen worked for a few minutes before it quit working. Wouldn’t even work with my laptop. The next screen I bought is a 7" 1024 x 600 unit from Adafruit. This display seemed to be perfect, uses about 500mA according to the specs which would be great for running off battery power. Anyway, I cannot get the Pi to display anything on it. The display works, if I connect it to my laptop it works fine. The green LED lights, according to the display’s documentation this means it has a valid HDMI signal. I tried adding the following lines to config.txt: <CODE>

    uncomment if hdmi display is not detected and composite is being output

    hdmi_force_hotplug=1

    uncomment to force a specific HDMI mode (here we are forcing 800x480!)

    hdmi_group=2 hdmi_mode=1 hdmi_mode=87 hdmi_cvt=1024 600 60 3 0 0 0 </CODE>

    which didn’t help.

    I am using a fresh install of Ubuntu Mate, 16.04. Anyone have any suggestions?

  • How much power does this draw when paired with a Pi? What is the Vin requirements? It looks like it requires a GPIO cable from the Pi, what is this used for? The instruction sheet doesn’t seem too clear. For my project I need to have access to the Pi’s UART port and it would be nice to have a few more IO pins.

  • This is a great little board. It runs fldigi and gnuradio well and is simple to setup with the 7" touchscreen and Raspian Linux. 2 things to note, bluetooth setup may be a bit convoluted, and so far I have found it impossible to get the wireless to connect to a hidden network. It works well connecting to wireless networks that broadcast their ssid. I had found instructions on how to connect to a hidden network but they didn’t work and I didn’t have time to troubleshoot further. I am very surprised at the computing power of such inexpensive little board. Do yourself a favor: Be sure you have a power source capable of 5V and maybe 2A. My 1.5A cell phone charger is barely enough to boot it up. I have found that I sometimes need to have all USB peripherals unplugged, and plug them in one at a time after bootup. Also, buy a stylus. Your finger tips are probably much too big to operate most software programs running on a 7" screen ;). With the bluetooth setup you may find that blueman does’t work, in which case you may have better luck with a command line tool. I ended up having to uninstall blueman as it was interfering with the command line utility.

  • What is the flooring? Is it anti-static by any chance?

  • Why did it have to be named edison… Wouldn’t the “Intel Tesla” have been a far better name? ;)

  • I don’t know if this will help anyone but… One of the things I noticed about this sensor is when I connect it to a PIC32 UART port, if I try to program the pic or pause it when it is running in debug mode the sensor quits sending data. Often it will not start back up until it is power cycled. To solve this I put a 100K resistor from the white wire to Vcc. When the PIC is reset the pins go from being driven to being in a high impedance state, making the color sensor see a start bit.

    Hope this is helpful.

  • Translucent case with RGB LEDs inside that are connected to PWM channels so the user can select his or her own color. Password protect the color setting so when someone else borrows your meter you will see it in use from across the shop floor.

  • And over here, our animatronic technician will demonstrate the proper technique to replace a capacitor that failed our flame test.

  • Ow Ow Ow Ow HOT HOT HOT

No public wish lists :(