555 timer examples in falstad circuits

Few 555 timer chip examples built digitally in falstad circuit builder.

This one is Schmitt trigger with 2/3 and 1/3 Vcc hysteresis.
Check out extra sliders and see how current through led changes.

Simulation is here - http://tinyurl.com/y4rnjs4o


Another one - LDR logic board. Similar, but without hysteresis as threshold pin is connected to stationary 10k resistor, so the output is passed on at strict threshold level chosen by adjusting the variable resistor.

And the simulation - http://tinyurl.com/y6l7blt2


Here is a monostable circuit. Use switch as a push button and the LED will stay turned on for a certain time.

http://tinyurl.com/y6o47oxw

Double8bit chiptunes synthesizer.

In these last New Year holidays I was figuring out how wavetables works and what can be done with them. This one is simple 8bit (256 samples length) wavetable VSTi synthesizer with syncable 8bit LFO. Waves can be drawn with mouse directly on wavetable area creating different user wavetables and save as txt files for further use. This synth has ADSR envelope, two-knob filter, LFO synchronisation with host, inner volume and gain control. Lite version can be downloaded here. Without LFO mix.

Battle City Tank noise (chipNoise) VSTi

Another VSTi based on chip created tune. This one created from famous Nintendo NES game "Battle City". Thats why the GUI is made based on the theme of this game. During the game these tanks has a two noise profiles. I recorded one, looped it and found that it has powerful bass and lead sound. Chaining such VSTi with different audio plugins possibilities are endless.

Super Mario VST sampler

During the Christmas holidays I made this sampler dedicated to Super Mario from NES console game. This sampler actually has 3 versions.
The first one V1 was created as light edition consisting only parts from surface level (level 1-1, 1-3, etc), subsurface level (1-2, and similar) and dragon level (1-4, boss levels). All versions still misses water level theme (2-2). I hope to make them soon and put in all versions. It has almost all effects (getting coin, both jump sounds, etc).
The second version V2 was created as full library splitting smaller song parts by half and one measures. It also has effects and three rhythm loops. I found out that using full library is inconvenient and I made the last version - V3
This version has the same parts divided only by 2 measures. It also have 2 octaves long bassy chip generated tones, almost all of them extracted directly from raw song. Only few tones which were not able to get manually are realtime created altering pitch from closest sample.

Only for few - 3 or 4 raw samples the post-processing were made removing some chip (emulator) created noise which was annoying after sound normalization.

While it has no real purpose for this sampler, its still fun and nostalgic to play around with it.
I should make a exe version of it.