From Bwtm

This page is about computers.


ZX80, ZX81, ZX spectrum

Remodelled ZX Spectrum production set to begin.

ZX81: Small black box of computing desire.

Sir Clive Sinclair is something of a hero to me, and I suspect a lot of other UK computer users in their 30's and older. He more or less single handedly created the UK home computer market. In the interview below Sir Clive discusses many issues: His view of the internet, the future of electric vehicles, flying cars, and the development of the computer. It's a typically eclectic mix of ideas, with ambitious schemes side by side with very perceptive comments on the current state of technology. An edited version of the interview below will appear on iPM this Saturday, below is the source material - largely unedited.


Web Hosting

Disk Usage

  1. April 25, 2018: 4242 M / 10240 M


The True Story of the Computer Worm that Took Down a Nuclear Facility.

mpv is a free and open-source general-purpose video player.

10 Hot New Boards to Watch.

AI, voice assistant, facial recognition

Rhasspy: a free/open voice assistant toolkit that's fully offline

The Internet

SpaceX's Satellite Internet Service Latency Comes in Under 20 Milliseconds. SpaceX disclosed the benchmarks in a presentation the company sent to the FCC last Friday. It also revealed the public beta for Starlink is coming to multiple US states. SpaceX included the data in a presentation it sent to the FCC last Friday, which was spotted by Reddit users. The two benchmark tests, conducted using Ookla’s service, show Starlink achieving a 102 to 103Mbps download rate, 40 to 42Mbps upload rate, and a latency of 18 to 19ms.

Tips & Tricks does just one thing: it visits URLs that you want to check out but don't trust, and shows you what comes up. It's not just a convenient wrapper around the curl command-line tool, but generates a rendered snapshot of the site to look around.. I would recommend URLScan 1 as well. It’s a tool I often use when investigating suspect links as it brings in reputation info, the various different connections out, the modules it loads and provides a handy screenshot of the page. In addition to that, I recommend Talos if you want to look up info about a domain or IP address. Edit: Oh, and who can forgot your friend and mine, VirusTotal for scanning links to file and the actual files themselves for malicious fingerprints.

For Oldsters

Linux For Grandma?





Linux Foundation Training Prepares the International Space Station for Linux Migration

Bare metal


Raspberry Pi


Turn your Pi into a low-cost HD surveillance cam

Touch sensing is handled by an MPR121 Capacitive Touch Sensor from SparkFun, for which I ported existing Arduino code to Python. This board communicates with a Python script on a Raspberry Pi via I2C. The script watches for new touches and triggers drum samples using pygame. Audio from the Pi’s line out is run through a small amplifier I built using an LM386, which is based on a circuit from Eric Rosenthal‘s Basic Analog Circuits class. The amp is connected to a salvaged speaker mounted under the holes in the lid.

Summer Coding Contest results (finally!)

Pi Crust breakout board

There’s been a flurry of discussion on the Pure Data developer lists about how to tweak the sound synthesis program to run well on the Raspberry Pi. Shawn Greenlee got his Pi working and has a video up on Vimeo showing some patches running. It looks like he’s using an inexpensive USB sound card for output, but others have had success with the HDMI audio out from the Pi as well. It seems like the analog output still needs some work on the driver side, as most people seem to get choppy output after a while. This seems like good progress though; I’ve always thought that sound synthesis (and Pure Data) is a kind of killer app for these tiny cheap embedded Linux computers.

The Adafruit team has been hard at work on a new programming tool for the Raspberry Pi: WebIDE. It launched today and is live and available. This is similar to the Beaglebone’s Cloud9 IDE/Node.JS/Bonescript solution, but seems friendlier; point your web browser at the Pi and start programming (well, almost).

Maker Faire New York: Learn About (and Buy a) Raspberry Pi

How do you connect more than two USB devices? Use a hub to increase the number of ports. Some keyboards have hubs built in which would work well.

Does the device support networking? Is there Wi-Fi? The Model B version of the device includes 10/100 wired Ethernet. There is no Ethernet on the Model A version (which we expect to be taken up mostly by the education market), but Wi-Fi will be available via a standard USB dongle.

Musical Hacks For Raspberry Pi


Getting Started with Raspberry Pi An accessible programming and hardware hacking platform for everyone By Matt Richardson, Shawn Wallace


This is our second distro, Occidentalis v0.2. Rubus occidentalis is the black raspberry.

How To

Pi Zero

Pi Hole

How to Set Up a Pi Hole to Block Ads and Speed Up Your Internet. With a little time and energy, anyone can build a little computer that kills advertisements and makes browsing more manageable.


How to turn a Raspberry Pi into an open source media center

10 Raspberry Pi Projects to Celebrate 10 Million Pis

Touchscreen Display and Rechargeable Battery Pack for the PiKon Telescope / Raspberry Pi

Easily Add a Shutdown Switch to a Raspberry Pi

“Raspberry Eye” Remote Servo Cam. Build a DIY pan/tilt webcam sentry, and watch it from anywhere online.

Shapeoko+Arduino+Raspberry Pi+Easel

Backup, Restore, Customize and Clone your Raspberry Pi SD Cards (tutorial)

How To Host A Website With Raspberry Pi.

Raspberry Pi + Kindle Fire = Frankentabletbook

DoodleBorg - Our V1 Raspberry Pi tank.

Setting up a Pi Camera with a Raspberry Pi

Raspberry Pi Face Recognition Treasure Box.

Introduction to Linux. Develop a good working knowledge of Linux using both the graphical interface and command line. Covers the three major distribution families.

Tutorial: Raspberry Pi GPIO Pins and Python.

Secret Knock Activated Drawer Lock. Unlock a drawer by knocking a secret pattern.

DIY WiFi Raspberry Pi Touchscreen Camera. Make your own Cloud-connected point-and-shoot camera.

You have three big choices here for XBMC operating systems on the Pi: Raspbmc (which we’ve covered before), OpenElec, and XBian. All three operate similar to a PC installation of XBMC and are packed with the same basic features, but they differ in small ways that make each distribution different on the Pi. Let's get down to big differences, pros, and cons between the three.

PiCon, the Raspberry Pi Configuration Manager.

Controlling 5 Servos With a Raspberry Pi

7 great Raspberry Pi YouTube tutorials

Webcam over 3G with Raspberry PI

10 More Mind-Blowing, Skill-Building Raspberry Pi Projects

Ten Tips for New Raspberry Pi Owners


sudo raspi-config

login: pi

password: raspberry


sudo halt



What works?

NPR player in the browser

YouTube works in the browser


Gweek mp3 player in the browser

How to

insert the SD card after power up otherwise file manager won't detect it.

to install from the sd card just click on the file icon


Stellaris LaunchPad from Texas Instruments, an ARM-based single-board kit that sells for only $13. The Stellaris LM4F120 LaunchPad kit includes the evaluation board and a USB cable; all the software and documentation necessary to program the board is available as a free download from TI.


Security cams

Logitech Alert 750i Indoor Master - HD-Quality Security System


Machine vision