Tänään on 31.03.2017 03:40 ja nimipäiviään viettävät: Irma, Irmeli ja Irmelin. MOBIILIVERSIO M.BLOGIVIRTA.FI

Kokeellisen elektroniikan seuran projektiblogi: WP-20 sound effects synthesizer

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I have been building some noisemakers using cardboard as pcb. It´s a nice material for building electronic projects at home because: 1. everybody may not have the needed equipment to make "real" pcb:s 2. every one has a piece of cardboard laying around. 3. It is cheap and easy. This is my latest creation on cardboard pcb. It´s wp-20 sound effects synth. It was very nice to do on cardboard because there was enough spce between components in the original pcb design. I did´t use the original noise source with 18v but i built a simple 9v noise generator. I left q1, r1, c3 unconnected to the board. here is the noise circuit. output of the noise generator was connected to r3 through 50k resistor. Testing wp-20 video: http://www.youtube.com/watch?v=hEDE96ycAec http://www.youtube.com/watch?v=dol7MjE7g8M link to music from outer space wp-20 page: http://www.musicfromouterspace.com/analogsynth/WP20/WP20_PG1.html I made a sub oscillator for my wp-20. It is based on cd4040 ripple counter it uses the vco squarewave (before the 100k resistor marked R8 in the original wp20 schematics) as clock input and divides it. Six switches (from 1 octave down to 6 octave down) select the harmonics to vcf-vca. The circuit is quite simple the component values may be tweaked to get better performance. I used components that I happened to have so some different values might work better but these seem to work ok. (sub osc out is connected to ic 2b pin 6 through a 100k resistor like the vco) here is a picture of the circuit

Avainsanat: youtube video sub space source sound some six select seem pin piece picture performance music material make link like it http html happaned everybody electronic effect design connected clock cheap built building board