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Mucking about in the attic

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Author Archives: bart

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4-wire fan PWM control using a PIC18F4550
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Posted on February 11, 2015 by bart

Introduction Once again I am playing around with PIC microcontrollers. Now I finished a complete demo that does this: drive a 4-wire fan, in my case a Noctua NF-S12A using PWM read the fan’s tachometer output to determine its speed … Continue reading →

Posted in PIC projects | Tagged 4-wire fan, MPLABX, PIC18F4550, PWM, xc8

DiskStation: fix ipkg and SSH after upgrade

Posted on March 11, 2013 by bart

For about half a year now I own a Synology DiskStation DS412+, which is a wonderful 4-bay NAS. I fitted it with 4 3TB Seagate drives for a grand total of 12 TB of storage. Later I will document how … Continue reading →

Posted in DiskStation | Tagged DiskStation, ipkg, nano, ssh, Synology

Secure shell access to the VPS

Posted on March 3, 2013 by bart

After setting up the bare VPS, it is time to gain secure access to our Ubuntu Server running on the VPS through a secure shell connection (SSH). From the standard RFC 4252 that defines SSH: The Secure Shell Protocol (SSH) … Continue reading →

Posted in Documentation, Server | Tagged PuTTY, ssh, TransIP, Ubuntu, ufw, VPS

Driving the 4 digit 7 segment display

Posted on June 27, 2011 by bart

Here is the documentation of my next step: driving the LED display. The design and the C code were not really difficult; the steps to put the results here were. As I noted before I use a PIC 16F887, but … Continue reading →

Posted in PIC projects | Tagged 16F887, 7 segment LED display, multiplexing, PIC development, SDCC

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