digital

Raspberry Pi, PyFace Digital, the lost documentation, I found it finally

The Raspberry PI or R-pi from http://www.raspberrypi.org/ is well known these days. It is not an accident that I have one, I have been doing Linux stuff since 1991, and professionally since 1996 I can not skip over these developments, have to keep up with the new kids. 🙂 Times have changed, hardware has become very affordable, …

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Interfacing Digital Compass (HMC5883L) with Raspberry Pi 2 using Python3

Initially, I was working on a maze solving robot. Instead of using ultrasonic and infrared on Arduino Mega for wall following like my friends did, I try to do something different using the digital compass and Raspberry Pi 2. This experience is totally new for me as I’m now using Python instead of C++ (well …

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Raspberry Pi Analog to Digital Conversion Experiments and Howto

The Raspberry Pi is a great little educational computer, but all models of the Raspberry Pi miss a critical ingredient for electronics experiments – an Analog to Digital converter. I am constantly working on upgrading my lab, and one of my needs is to measure many channels of analog signals, with reasonably high precision. I …

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A simple analog proximity sensor with digital interface (for Raspberry Pi) [last update: Feb 7, 2014]

Raspberry Pi has a Broadcom BCM2835 chip, which controls 26 GPIO (general purpose input/output) pins. There are C library or RPi.GPIO python package available online that can be used to control the pins. The RPi.GPIO package is by default included in most Raspberry Pi system, such as Raspbian, a RPi version of Debian linux system. One …

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