Three Fives on veroboard


Following on from Ha Ha Ha… 555 fun, after watching Dave’s video on the Three Fives kits by Mad Scientist, EEVblog #555 – 555 Timer Kit, I set about making a veroboard design. After a few hours I’d finally come up with a design that fits perfectly on 24T x 37H veroboard (see Veroboard).

The transistors 2N3904 and 2N3906 are £0.99 for 100 pieces of each:

or for $0.99

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Ha Ha Ha… 555 fun


Today I realised that I didn’t have any 555 timer ICs, which was a bit of an oversight, seeing as I need a couple for LFOs. So I ordered 100 for £2.40, 100PCS NE555P NE555 DIP-8 SINGLE BIPOLAR TIMERS IC factory price, what a bargain..! As I had over ordered, as usual, I thought that I had better find something to do with them…

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Messrs. Schmitt, Trigger and APC (and other stories)


Just for the hell of it, I wondered if it was possible to substitute the 555 timers in an Atari Punk Console (APC) with some other component, or components.

After seeing some Schmitt-trigger inverters (CD40106) used in oscillator circuits, see Swingers, I thought that I would come up with an alternative design.

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555 Noisemusick kit


A friend of mine sent me details of the 555 Noisemusick kit, which, while it looks like an Atari Punk Console (APC) – see Atari Punx… – it is essentially two astable multivibrators, with the first providing a CV input to the second, and with additional IR sensors and touch pads (rather than an astable followed by a monostable, which is what the APC is).

It is also available as an iOS app, source code is available on github:Noisemusick.

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Sequence Dancing


Following on from Atari Punx…, which was my first foray into the world of electronic sound generation, it seemed that a sequencer is a very useful piece of additional kit. One can be easily made using a CD4017 decade counter (or CD4022 octal counter)… However, other ICs can be used, to provide additional functionality. For example, a CD4510/CD4516 BCD/Binary counter and a decoder or 16 channel multiplexer, such as a CD4028 or CD4067, can add up/down sequencing, pre-loading and other features.

Let’s take a look at all of these ICs as well as some others.

VCO, VCF and VCA circuits are also touched upon, be are covered more fully in Banging noises…

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