Category Archives: Uncategorized

Lately my BMP085 temperature sensor, connected to a Raspberry Pi through the i2c interface stopped working. Turns out that all I needed to do was apt-get install raspi-config, and use that raspi-config tool to enable i2c. Great. Btw, if you … Continue reading →

apt-get install exfat-fuse exfat-utils

An oscilloscope for the Pi, to check the states of the GPIO pins. Install the daemon on the Pi: http://abyz.co.uk/rpi/pigpio/download.html wget abyz.co.uk/rpi/pigpio/pigpio.zip unzip pigpio.zip cd PIGPIO make make install — Install the “viewer”, the scope.. on your computer: http://abyz.co.uk/rpi/pigpio/piscope.html wget … Continue reading →

I got a 30 RGB Led strip with WS2812B: http://www.tweaking4all.com/wp-content/uploads/2014/01/WS2812.pdf Its digital, it operates on 5V.  Each led draws approximately 50 mA at 5 V with red, green, and blue at full brightness -> 1.5A 5v 2A power supply will … Continue reading →

Using these instructions: http://shop.ninjablocks.com/blogs/how-to/7506204-adding-433-to-your-raspberry-pi Interesting comment: I follow this guide and use RPi_utils to receive and send RF code to my RF devices, but it didn’t work. Then adding this line to the codesend.cpp did the trick: mySwitch.setPulseLength(207); For Arduino: … Continue reading →

This: http://shop.ninjablocks.com/blogs/how-to/7506204-adding-433-to-your-raspberry-pi and: http://www.disk91.com/2013/technology/hardware/raspberry-pi-receive-433mhz-radio-signal/ if the receiver needs 5v, remember the nice 5v->3.3v circuit: http://www.disk91.com/2013/technology/hardware/oregon-scientific-sensors-with-raspberry-pi/   Basically just install wiringPi, then the 433utils: root@rpi02:~# git clone git://github.com/ninjablocks/433Utils.git Cloning into ‘433Utils’… remote: Counting objects: 129, done. remote: Total 129 (delta 0), … Continue reading →

To get a system wide sound equalizer in Debian: http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu/pool/main/p/pulseaudio-equalizer/ For my system I get this one: pulseaudio-equalizer_2.7.0.2-3~webupd8~trusty1_all.deb It will need this package: # apt-get install ladspa-sdk Then just manually install the .deb # dpkg -i pulseaudio-equalizer_2.7.0.2-3~webupd8~trusty1_all.deb In my menu … Continue reading →

I want to make a long display with scrolling text, with multiple of these MAX7219 led matrix modules. I need this: https://github.com/JonA1961/MAX7219array -> git clone https://github.com/JonA1961/MAX7219array test the demo: ImportError: No module named spidev Ah. http://www.100randomtasks.com/simple-spi-on-raspberry-pi Make sure you have … Continue reading →

The real name for this is “Lazy loading”: In OwnCloud 7 came that new feature. When you browse your files, the full list does not appear immediately, but when you scroll down. This was implemented in order to make OC … Continue reading →

Yeah, that was easy,  I just gather resources here as reference… Next I want to daisy chain a few of these, and then I’ll get into the real stuff: Getting my 8×8 RGB led array connected and working, this time … Continue reading →