Big Silver Eyeball Call For Art

Freaky Steve Presents
The Big Silver Eyeball From Outer Space
A Revelation of the Method  Production

We are pleased to present our Memorial Day Weekend show

You are invited and encouraged to submit your Science Fiction or Eye themed artwork to the Eyeball for this unique showing opportunity.

Space is limited, this is a juried event, only 12-18 artists can be accepted.

Event Date: Friday May 24th, 2013   2720 Cherokee second floor 
7pm – 1am   Admission: $5

Event Location:  2720  Cherokee (second floor gallery)

Submission Deadline – May 10, 2013

Acceptance Notification – May 12, 2013

**Please read the following instructions very carefully.
If you have any questions please send them via email
to bigsilvereyeball@gmail.com**

SUBMISSION RULES:
-*All submitted images must be jpegs.  If submitting
more than one image send all images in one email to
bigsilvereyeball@gmail.com.  Total size of
email cannot exceed the maximum of 25MB.

-*Only one image will be needed for flat art.  You may
send two images of 3-D works if you feel it is
necessary.

-*Image files should be titled as such: lastname_first
name_nameofpiece.jpg  (i.e. doe_john_mypainting.jpg)

-*Your email should include the following: Your name,
address, phone number, email address, the number of
pieces submitted, name, media, size in inches and
price of each piece.

-*There is no cost for submitting work.  If your work is
accepted there will be a $20 entry fee per artist
payable in cash only at the time of drop-off.

-*All accepted work must be ready for display.  All flat
work must be framed with a wire across the back.
Gallery Wrapped canvases need not be framed but
must also have a wire across the back.  No saw tooth
hangers or other forms of hanging will be accepted.
We will not pin or tape up work.  If 3-D works require a
pedestal, this will need to be provided by the artist.

-*Any work deemed difficult to install will not be
accepted.  Please note that we cannot hang work
from the ceiling.

-*All accepted artwork must be dropped off and
picked up in person.  We cannot receive or send
shipments of artwork.  Drop-off and Pick-up dates will
be provided at time of acceptance notification.

-*Neither Freaky Steve nor 2720 nor the eyeball itself will handle the sale of art.  Each artist is responsible for managing the sale of their own work.  No commission of such sales
will be taken by The Eyeball or the 2720; each
artist will keep 100% of their sales.

Custom Screen Printing Ad screenburstgraphics.com w/ original dnb track

I made this video for screenburstgraphics.com, the track is an all original dnb track made with reason.

Electricity for Synth-DIY’ers: Operational Amplifiers

excellent artical on op amps from sequence 15 blog    “”"”A basic opamp has two inputs and one output. The two inputs are known as the inverting and non-inverting inputs; as one might guess, the output will be inversely proportional to the signal at the inverting input, and directly proportional to the signal at the non-inverting input. That’s a bit of an over-simplification, though; it often leads beginners to believe that what the opamp does is amplify the difference between the two inputs. There’s more to how an opamp works than that, though.”"”    jump to article

This circuit is a low-pass filter. It has a certain gain at low frequencies and less gain as the frequency goes up; at a sufficiently high frequency, its gain is zero. Doing the math, we find that, just like any filter, there is a cutoff frequency determined by the capacitor’s value and above that value the gain rolls off at 6 dB/octave, making it a single-pole filter. The cutoff frequency is: 1/(6.2832R1C) where R1 is in ohms and C is in whole farads.

 

got a parts kit from the overpriced shack,, this kit is a pretty good deal

CK-1000 Basic Electronic Parts Kit

 

- 1/4W 5% resistors (5 each; 85 total): 10, 100, 470, 1k, 2.2k, 4.7k, 8.2k, 10k, 18k, 27k, 47k, 82k, 10k, 220k, 330k, 470k, 1M
- trim pots (1 each; 7 total): 500, 1k, 5k, 50k, 100k, 500k, 1M
- 50V ceramic caps (2 each; 20 total): 2.2pF, 5pF, 10pF, 15pF, 22pF, 47pF, 100pF, 220pF, 470pF, 680pF
- 100V mylar caps (2 each; 12 total): .001uF, 0.0047uF, 0.01uF, 0.047uF, 0.1uF, 0.33uF
- 50V electrolytic radial caps (2 each; 10 total): 1uF, 4.7uF, 100uF, 470uF
- 35V electrolytic radial caps (2 total): 1000uF
- “1.5A bridge rectifier” (2W005G)
- diodes (2 each; 14 total): 1N34A, 1N4148, 1N4001, 1N4728, 1N4739, 1N4743, 1N4747
- silicon-controlled rectifier: HC106D
- transistors (2 each; 12 total): 2N2222A, 2N2907, 2N3055, 2N3904, 2N3906, 2N5457
- op amp ICs (2 each; 4 total): LM386, UA741CN
- voltage regulator ICs (2 each; 4 total): LM7812, UTC7805,
- logic ICs (2 each; 18 total): NE555N (8-pin timer), CD4013BD (14-pin CMOS dual D-type flip-flop), CD4017BD (16-pin CMOS counter/divider), HD74LS00P/HD74LS02P/HD74LS08P (14-pin quad 2-input NAND/NOR/AND gates), HD74LS10P (14-pin triple 3-input NAND gate), HD74LS74AP (14-pin dual D-type edge-triggered flip-flop), HD74LS86P (14-pin quad XOR gate)
- “photo cell” (cadmium sulfide photoresister; haven’t measured it)
- LEDs (4 each; 16 total): red, green, white, yellow
- seven-segment LEDs (2 each; 4 total): 350071, 350074
- inductors (1 each; 8 total): 4.7uH, 10uH, 47uH, 100uH, 470uH, 1mH, 10mH, 33mH
- 5V DPDT relay: GS-SH-205T
- switches (2 each; 8 total): momentary SPST, slide SPDT, slide DPDT, 8-pole DIP SPST
- “condenser microphone”
- 9V battery snap
- 8-ohm 0.5W speaker
- piezo buzzer
- alligator clips [just clips with nothing attached] (2 each; 4 total): red, black
- 22ga wire (5ft each; 25ft total): black, red, orange, yellow, green

XR-2211

SYSTEM DESCRIPTION
The main PLL within the XR-2211 is constructed from an
input preamplifier, analog multiplier used as a phase
detector and a precision voltage controlled oscillator
(VCO). The preamplifier is used as a limiter such that
input signals above typically 10mV rms are amplified to a
constant high level signal. The multiplying-type phase
detector acts as a digital exclusive or gate. Its output
(unfiltered) produces sum and difference frequencies of
the input and the VCO output. The VCO is actually a
current controlled oscillator with its normal input current
(fO) set by a resistor (R0) to ground and its driving current
with a resistor (R1) from the phase detector.
The output of the phase detector produces sum and
difference of the input and the VCO frequencies
(internally connected). When in lock, these frequencies
are fIN+ fVCO (2 times fIN when in lock) and fIN – fVCO (0Hz
when lock). By adding a capacitor to the phase detector
output, the 2 times fIN component is reduced, leaving a
DC voltage that represents the phase difference between
the two frequencies. This closes the loop and allows the
VCO to track the input frequency.
The FSK comparator is used to determine if the VCO is
driven above or below the center frequency (FSK
comparator). This will produce both active high and
active low outputs to indicate when the main PLL is in lock
(quadrature phase detector and lock detector
comparator).

CEM3372 VCF / VCA IC

The CEM 3372 is a generalpurpose signal processisng device for audio tone sources.Included on-chip are a two channel voltage controlled input mixer, a dedicated 4-pole low pass voltage controlled filter with voltage controllable resonance,and a quality final voltagecontrolled amplifier. With theexception of the filter cut-off frequency, all control inputs are very low bias current, high impedance inputs which range from 0 to +5 volts. This feature allows the common DAC output voltage in a microprocessor system to be multiplexed to these inputs with only a CMOS analog multiplexer and hold capacitors, thus eliminating the usual Sample & Hold buffers. The two input VCAs of the mixer feature audio taper control scales and high attenuation at zero control voltage. The signal inputs are low level (80mV.P.P. for 5% THO), allowing multipletone sources to be conveniently mixed into each channel. A unique feature of the 24dB/octave filter is that, unlike others of this type, the passband gain remains constant as the amount of resonance is varied, thus eliminating the annoying drop in volume at higher resonance settings. Otherfeatures include wide frequency control range, temperature compensated transconductors,low noise, low control feedthrough, and a smooth behaviour when swept.The final output VCA is a current in, current out type, allowing multiple inputs to be easily mixed into its input, and easy interface of its output to the rest of the system. The control scale is very linear, and the point at which the VCA shuts off is very well defined (+100mV ± 50mV). OWing to its exceptionally low
noise and exceptionally low control feedthrough witbout trimming, this VCA is well suited to being controlled by fasttransient waveforms.

RETICON SAD1024A chip

Used by:
ADA Flanger
ANDERTON Flanger
BEL ELECTRONICS Delay/Flanger BA-40
BOSS Flanger BF-1
DYNACORD DC300-E
DOD Flanger 640
ELECTRO HARMONIX EH-5100, EH7500, EH-7811
ELECTRO HARMONIX Electric Mistress Flanger (EH-5150)
ELECTRO HARMONIX Electric Mistress Flanger (UK ver., 1980)
ELECTRO HARMONIX Echo Flanger (EH-7700)
ELECTRO HARMONIX Memory Man DeLuxe (EH-7550)
ELECTRO HARMONIX Slap Back Echo (EH-4700)
ELECTRO HARMONIX Vintage Clone Theory
HARMONY Synthesizer
KORG some keyboards
IBANEZ Flanger FL-305
LUPINE Systems SAD1024 Delay
MAXSON MP-DL201 Flanger
MONTGOMERY APPLIANCES 77 Flanger (ADA Flanger Clone)
MXR Flanger / Flanger M-117R
MXR Pitch-Shift Doubler
PAiA Phlanger
ROLAND Some Guitar Pedals
ROLAND VP-330 (Vocoder Plus)
ROSS Stereo Delay (R-80)
TEL-RAY Morley Chorus-Flanger CFL
VOX 1902 Flanger (1981)

“Obsoleted by everyone except musicians, engineers, producers, and anyone else who happens to like the coloration imparted by a nice bucket brigade delay.”

WIKI page on bucket brigades

“a discrete-time analogue delay line,[1] developed in 1969 by F. Sangster and K. Teer of the Philips Research Labs. It consists of a series of capacitance sections C0 to Cn. The stored analogue signal is moved along the line of capacitors, one step at each clock cycle. The name comes from analogy with the term bucket brigade, used for a line of people passing buckets of water.”
A well-known integrated circuit device around 1980, the Reticon SAD-1024[2] implemented two 512-stage analog delay lines in a 16-pin DIP. It allowed clock frequencies ranging from 1.5 kHz to more than 1.5 MHz. The SAD-512 was a single delay line version.

http://electronicdesign.com/article/analog-and-mixed-signal/an-accurate-analog-delay-circuit6348

bucket brigade analog delay chip

discrete-time analogue delay line,^[1] developed in 1969 by F. Sangster and K. Teer of the Philips Research Labs. It consists of a series of capacitance sections C₀ to C_n. The stored analogue signal is moved along the line of capacitors, one step at each clock cycle.

 

I wanted to buy a couple of these cem3394 chips, but was late :(

The CEM3394 is a complete analog music synthesizer voice-on-a-chip intended for software control
by a microprocessor system. Included inside the compact 20 pin package is fully temperature
compensated, wide range, voltage controlled oscillator providing triangle, sawtooth, and pulse
waveforms; a voltage controlled mixer for adjusting the balance between the internally generated
VCO waveforms and any external signal; a dedicated four-pole low-pass voltage controlled filter
with voltage controlled resonance; a modulation amount VCA for modulating the filter frequency
by the triangle waveform output of the VCO; and a final VCA for allowing the output to be
enveloped. Envelope control for both the VCF and final VCA may be provided by either a hardware
envelope generator such as the CEM3310, CEM3371, or through software. PDF Datasheet

CEM3394 modular schematic

CEM3394 uP CONTROLLABLE SYNTHESIZER VOICE « on: September 07, 2009, 12:09:57 PM »

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Curtis CEM
Curtis CEM chips are analog chips used in many synthesizers. Produced by Doug Curtis (died 1/2007).
http://en.wikipedia.org/wiki/Curtis_CEM

Synthesis Technology: Curtis Electromusic Datasheet Page
http://www.synthtech.com/cem/c3394pdf.pdf | http://www.synthtech.com/cem/cemdata.html

CEM3394 Interface
Version 2 By Aaron Cram (2000)
http://electro-music.com/forum/phpbb-files/cem3394_v2_163.pdf

Product Overview:
http://curtiselectromusic.com/Product_Overview.html

Raw6oscillator

raw6oscillato

 

http://www.reverbnation.com/revelationofthemethod