Retain your old home

Preamble

Have you ever had to install a new version of OS X  and then wished that you still had your old home directory?

Here is the method to do that, assuming that you still have your original OS X partition/disk, and that the new version of OS X is on a separate partition/disk…

Continue reading Retain your old home

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Atari Punx…

Preamble

A friend of mine, Pavel, from the group Bang Sue Electrix, told me about the Atari Punk Sound generator. I’d never heard of it before, and I initially thought that he wanted to re-create either an old Atari VCS games console, or Atari 800 PC. When he showed me the Wikipedia – Atari Punk Console page, I realised that he was actually referring to a Stepped Tone Generator, formed from an astable square wave oscillator driving a monostable oscillator, (or – if you prefer – an astable multivibrator circuit triggering a monostable multivibrator circuit) which uses two 555 timers (or a single 556 timer IC)…

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Reminiscent of vintage Atari video games, the synthesizer’s output is a characteristic Forrest Mims, a popular electronics author, published the original Atari Punk Console schematic for a “Sound Synthesizer” in Engineer’s Notebook: Integrated Circuit Applications   and then a “Stepped Tone Generator” in Engineer’s Mini-Notebook: 555 Circuits.  Kaustic Machines took the circuit and popularized their version as the “Atari Punk Console”.

This article also takes a look at some unrelated 4069 musical projects…

See also Banging noises… and Sequence Dancing.

Continue reading Atari Punx…