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geg3
Joined: Apr 21, 2008
Posts: 25
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 Posted: Mon Apr 21, 2008 12:47 pm Post subject:
hello!
Subject description: introducing myself |
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first post! figured i should introduce myself, as ill probably be posting here a bit from now on. this lunetta stuff is great. i havnt built any electronics since i went through a diy guitar pedal phase about 6 years ago, but i stumbled across this forum and im totally hooked. already built a WSG (from ray wilson, a 6 osc 40106 box + filter) to get my skills back in order. i finished that last night, and today i get my shipment of lunetta parts in.
the whole idea of actually listening to the digital functions of cmos chips, and forming the CONTENT of the audio with them, is just awesome. this forum is a gold mine of ideas. actually, the entire electro-music forum/archive is insane. wrapping my head around this project has been a bit of an endeavor, which would have been impossible without these resources.
the blocks im starting out with are
2 x 40106 clock/osc - one hex, one quad w/ sync (ala bug's schematic). im adding 1/8" jacks that function as a 'resistor' in, so i can use the knob on the panel, or plug in anything from photoresistors to basic ribbon controllers. i wanted something flexible and this seems like an easy way to do it
1 x 4021 8 stage shift register - serial in, parallel/serial out
3 x 4040 counter/divider (im guessing that sub octaves will sound cool hehe)
2 x 4051 de/multiplexer
1 x 4070 quad XOR
1 x 4081 quad AND
1 x 4071 quad OR
1 x 4069 hex inverter
also at least 1 bank of 1 in 2 out signal splitters and an 8 input attentuated mixer w/ 1/4" out. banana jacks - leds hanging off each output - hi/lo/ext switch on each input.
still contemplating the power distribution. i got a 12vdc 500ma wall wart. im copying bug's use of 100uf and 0.1uf stabilizing/decoupling caps. hopefully it wont be too noisy...
im getting custom cut .04" aluminum (6061) panels from onlinemetals.com. going with 5.25"x1.5" standard. the prices are awesome and shipping is faaast. 
i do DIY screen printing of t shirts and other crap here at home, so for the WSG i defaulted to that. it sort of sucked as a process. making the screen is a pain and printing it onto the plastic box i used was irritating. it came out okay, but the cost of screens/special ink for metals and plastics/having to put a clear coat over it/and the at best "rough" quality of the final look put me off the whole process.
there were some very vague discussions of electro-etching panels, which i found were echoed by very vague web sites that say its possible but dont explain how. so i tried! put a retro 50s style nuclear atom onto my stainless steel flask via salt water and a guitar pedal wall wart. it sort of worked, but i DID screw up one step so i will return to this method. in the process i discovered that doing a direct toner transfer (laser jet toner printed onto glossy magazine paper heated with an iron onto the metal) worked INCREDIBLY well. it was also very easy and cost pennies at most. if i cant work out the bugs in the etching process, ill just stick with the toner transfer.
this big order of parts is from mouser, but i just found out about digikey and they seem to have a way better selection of cmos 4000 series parts. futurlec has kick ass prices for knobs/pots/faders/etc, but their delivery times are HORRIBLE. my urge to do-it-myself tells me to do-it-NOW. are there any places that sell everything i need at decent prices w/ reasonable shipping times ..? 
i'll be breadboarding circuits within a couple hours and putting them on veroboard by tonight. the panel metal isnt here yet, and i hope to have most of the blocks done by the end of the week. hopefully i can bang out some panels quickly and get a few of these up and making sounds. still need to make a rack.....
damn thats a lot of words. if you cant tell, im seriously excited about all this. ive been making patches in my head for like a month, and need to make em physical.
for power distribution, should i just parallel the wall wart to each module? |
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blue hell
Site Admin
Joined: Apr 03, 2004
Posts: 24864
Location: The Netherlands, Enschede
Audio files: 353
G2 patch files: 320
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Posted: Mon Apr 21, 2008 1:17 pm Post subject:
Re: hello!
Subject description: introducing myself |
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| geg3 wrote: | if you cant tell, im seriously excited about all this. ive been making patches in my head for like a month, and need to make em physical.
for power distribution, should i just parallel the wall wart to each module? |
Very good, you belong here 
As for the power question, why not, a lot of cmos can be powered from one wall wart. You could run a star topology instead of a bus, but it won't be too critical as long as you put some decoupling capacitors over the IC's power lines. |
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geg3
Joined: Apr 21, 2008
Posts: 25
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| Posted: Mon Apr 21, 2008 2:55 pm Post subject:
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wicked, thats what i was hoping. i totally spaced on power regulators and ic sockets, of all things. now it will be a week till im up and running on this D:
till then: BREADBOARD TIME!
-gordon
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live from the black iron prison |
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scriptstyle
Joined: Jan 22, 2008
Posts: 250
Location: nj
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| Posted: Tue Apr 22, 2008 2:27 am Post subject:
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| Can't wait to see this stuff!! Mine is starting to come alive. I should start a progress thread soon. Maybe after my order from futurlatec comes... Eh! |
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loss1234
Joined: Jul 24, 2007
Posts: 1536
Location: nyc
Audio files: 41
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