555 circuits


Posted on Feb 6, 2014

I`ve decided to start selling these on ebay to raise some money for parts. Here`s a link to the current auction and here`s a photo of the current model: Switchgate is a simple dual gate based on a 556 in monostable mode (with trigger input), with the monostables triggering two switches. The monostable outputs are also accessible via their own


555 circuits
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outputs. Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser. Some recent research led me to another conglomeration of circuit snippets, which I`m currently calling the PO-555N (Phoenix Oscillator, 555 based, N for nasty ). The square-to-saw (which you may recognize from the 566 osc) and the saw-to-triangle bits are tweaked versions of circuits found at the Experimentalists Anonymous archives. This one has a much wider range- from LFO rates to high audio rates- and also adds more waveshaping options. Like the previous 566 osc, this one is not compatible with any modular synth standards (such as 1V/oct CV response), but the pitch/rate can be modulated via CV input. This one also adds a fine-tuning knob. Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser. Towards the end (after 2:00-ish), you can also hear the tri glitch  feature, which is simply positive feedback through a capacitor on the saw-to-triangle side of the op amp, a little something I came across while messing around. This will be replacing the APC oscillator in Phoenix, which was just there as a placeholder because I wanted more sound sources right away. I`m also going to be reconfiguring the front panel so...




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