Sequence Dancing

Preamble

Following on from Atari Punx…, a sequencer is a very useful piece of additional kit. One can be easily made using a 4017 decade counter.

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Banging noises…

Preamble

As a follow on from Atari Punx… a home grown, simple, drum machine is required. We first thought that a 555 based drum machine would be nice, but a µController is required for sequencing really.

White noise generators are also looked at.

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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.

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Putting together a MTB from parts

Preamble

A friend gave me the remaining parts of his mountain bike, after some thieves had taken what they had wanted. These parts included:

Some miscellaneous parts (front and rear derailleurs, side stand, seat post mounts, etc.):

Miscellaneous parts

The Bottom Bracket

Bottom Bracket

Here is a photo of all of the parts, including the frame, and rear shock.

The frame

I then proceeded to gather the missing parts that were needed and rebuild it.
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