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inside view of the LCDuino1 (arduino based), delta1 controller and delta1 relay attenuator board. it runs my own VoluMaster firmware (currently in alpha test; soon to enter beta).
of interest: far left/top is a motorized pot and this has a unique function: it allows the user to directly adjust the volume but when the IR remote control is used, the motor 'keeps up' and always has the dot on the knob pointing to the current absolute volume level.
the lcd is part of a 3 layer 'sandwich'. toward the panel is the lcd, itself; a standard 16x2 hitachi parallel lcd module. next comes the lcduino1 which is a board that I co-designed with AMB.org and its main purpose is to control an 'audio system' (which has many components to it; one of which is volume control between a DAC and an amp). the 3rd layer is the 'app specific' board and its on perfboard, right now. it connects up the standard cpu lines that the lcd1 gives us and makes this an audio controller with all the things an audio controller would need.
on the rear are 2 power jacks: one is dc-power in (5v) and the other is a ttl switched 5v line used to turn on and off amplifiers (think: sleep timer) via an SSR (solid state relay).
central on the delta1 control board are a set of led bargraph displays. this is a unique feature that allows the developer (and user) to debug and even 'watch' the relay control lines. twist the knob and you get a free light-show every time ;) the yellow jumper disables this (for normal mode).
more info on this project at: www.amb.org/forum/delta1-relay-based-r-2r-stereo-attenuat...
Based on an LM3914 bargraph chip, this voltmeter measures input voltages between 10 vdc and 14.5 vdc. Using a multi-colored LED bar graph, voltage is easily read off.
Available on ebay Ebay - item # 161069862684
New York / United States
Queens
See where this picture was taken. [?]
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serial # 0001 ;) very first build on production pc boards.
controller is up front and relay unit is in the rear. controller has 2 LED bargraph displays for debug and 'light show' if desired ;)
this unit is meant to be controlled by an arduino (such as our LCDuino-1 controller).
more info: Delta1
online calc: r2r calc
The Coupé, first displayed at the Paris Salon 1980, featured a similar body shape to the Quattro, but without the knife-edged fender flares of the more expensive car. Mechanically, the biggest changes from the Quattro to the Coupé were the use of a naturally aspirated 1.9 litre carburettor petrol engine, 2.0L, 2.1, 2.2, or 2.3L fuel injected inline five cylinder engine and a front-wheel drive drivetrain. Some lesser Coupés were also fitted with a 1.8L inline four cylinder engine, injected or carburetted, and for the very first year of production a 1.6L engine was available. The short-lived 1.6L was the only Coupé not to be fitted with a black rear spoiler.
The Coupé was available as just plain "Coupé" or GL, "Coupé GT", and "Coupé quattro". From 1986 until the end of production in late 1988, the Coupé GT was also available with the 1.8L PV/DZ Inline-four best known from the Golf GTi. For the last model year, the new 2,309 cc "NG" five cylinder was available. This engine became available during 1987 for the last of the Audi Coupés sold in the US, where it produced 130hp as opposed to the 110hp available from the 2.2L which had been used since the facelift for model year 1985.
In September 1984, Audi made available the option of the quattro permanent four-wheel drive system to produce the Audi Coupé quattro, a model which was rarer than the turbocharged Quattro model. While most common with the 2.2L engine, in some markets the 1.8L four-cylinder models were also available with four-wheel drive.
The Coupé and Coupé quattro models appear almost identical from the outside except for a few minor "quattro" specifics. While the GT had "COUPE GT" on the rear side windows, the CQ had the "quattro" decal as used on the Ur-Quattro. Similarly at the rear, the badging was "GT" and "quattro" respectively. The quattro versions also used the Ur-Quattro rear windscreen with "quattro" written into the heater elements (very obviously so on a cold and frosty morning), and the front grille was also adorned with the "quattro" badge from the Ur-Q. Inside, the cabin was identical except that the centre console received a differential lock switch, and LED bargraph displays in place of the GT's three analogue-style gauges. Some Coupé quattros were distinguished by a body-coloured rear spoiler.
Rear view of facelift Coupé GT
Mechanically, the Coupé quattro depended on a combination of components from the GT and the Audi 80 quattro. The quattro permanent four-wheel drive drivetrain was almost identical to that used on the Ur-Quattro - the main differences being the use of the Coupé GT front struts, smaller 256 mm (10 in) diameter front brake disks, and lower ratios in the gearbox and rear differential. The damper and spring rates were also different from the Ur-Q. It was thus largely identical to the Audi 90 quattro and the North American Audi 4000 quattro. Roadwheels were 6.0Jx14", with steel or aluminium alloy rims dependent on the market. 7.0Jx15" Ronals, almost identical to the Ur-Quattro wheels, were also available. The CQ/90Q/4000Q also received their own exhaust manifold and downpipe (5-3-1, while FWD versions were 5-2-1).
From September 1980 to September 1987, 174,687 Typ 81 Coupés were built. Quattro production ran from late 1984 to 1988, and was in the total region of 8,000 cars.
The Coupé, first displayed at the Paris Salon 1980, featured a similar body shape to the Quattro, but without the knife-edged fender flares of the more expensive car. Mechanically, the biggest changes from the Quattro to the Coupé were the use of a naturally aspirated 1.9 litre carburettor petrol engine, 2.0L, 2.1, 2.2, or 2.3L fuel injected inline five cylinder engine and a front-wheel drive drivetrain. Some lesser Coupés were also fitted with a 1.8L inline four cylinder engine, injected or carburetted, and for the very first year of production a 1.6L engine was available. The short-lived 1.6L was the only Coupé not to be fitted with a black rear spoiler.
The Coupé was available as just plain "Coupé" or GL, "Coupé GT", and "Coupé quattro". From 1986 until the end of production in late 1988, the Coupé GT was also available with the 1.8L PV/DZ Inline-four best known from the Golf GTi. For the last model year, the new 2,309 cc "NG" five cylinder was available. This engine became available during 1987 for the last of the Audi Coupés sold in the US, where it produced 130hp as opposed to the 110hp available from the 2.2L which had been used since the facelift for model year 1985.
In September 1984, Audi made available the option of the quattro permanent four-wheel drive system to produce the Audi Coupé quattro, a model which was rarer than the turbocharged Quattro model. While most common with the 2.2L engine, in some markets the 1.8L four-cylinder models were also available with four-wheel drive.
The Coupé and Coupé quattro models appear almost identical from the outside except for a few minor "quattro" specifics. While the GT had "COUPE GT" on the rear side windows, the CQ had the "quattro" decal as used on the Ur-Quattro. Similarly at the rear, the badging was "GT" and "quattro" respectively. The quattro versions also used the Ur-Quattro rear windscreen with "quattro" written into the heater elements (very obviously so on a cold and frosty morning), and the front grille was also adorned with the "quattro" badge from the Ur-Q. Inside, the cabin was identical except that the centre console received a differential lock switch, and LED bargraph displays in place of the GT's three analogue-style gauges. Some Coupé quattros were distinguished by a body-coloured rear spoiler.
Rear view of facelift Coupé GT
Mechanically, the Coupé quattro depended on a combination of components from the GT and the Audi 80 quattro. The quattro permanent four-wheel drive drivetrain was almost identical to that used on the Ur-Quattro - the main differences being the use of the Coupé GT front struts, smaller 256 mm (10 in) diameter front brake disks, and lower ratios in the gearbox and rear differential. The damper and spring rates were also different from the Ur-Q. It was thus largely identical to the Audi 90 quattro and the North American Audi 4000 quattro. Roadwheels were 6.0Jx14", with steel or aluminium alloy rims dependent on the market. 7.0Jx15" Ronals, almost identical to the Ur-Quattro wheels, were also available. The CQ/90Q/4000Q also received their own exhaust manifold and downpipe (5-3-1, while FWD versions were 5-2-1).
From September 1980 to September 1987, 174,687 Typ 81 Coupés were built. Quattro production ran from late 1984 to 1988, and was in the total region of 8,000 cars.
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this moving bargraph (histogram) prints one line at the bottom and then up-shifts the graph region by 1 line every 10 seconds. the bottom line is always 'current' and continues to update ('move') during that 10-second hold-down interval.
the current value is displayed at the bottom right in C or F degrees. if the temperature was climing, a plus sign is drawn; if decreasing then a minus sign, else if its staying the same, an equals sign.
the top/right field is a settable stopwatch/clock.
the graph is scaled so that its min mark (left edge) is about 75 degrees C and the top of the scale (right edge) is 105C; that's an 'expanded scale' and lets the user watch for rising/falling temperature trends.
user input is via any old sony dvd/cd IR remote. there is a built-in IR sensor (left of lcd display) and that's where the user points the remote to control the Espresso-Master device. (IR remotes are an easy way to get access to LOTS of buttons and only need a single photo-transistor device for the receiving end).
all code (c) 2009 LinuxWorks labs.
sample code (non-commercial DIY use only) at:
www.netstuff.org/espresso-master/firmware/arduino/
one more snapshot:
www.flickr.com/photos/linux-works/3680926620/
internal view:
www.flickr.com/photos/linux-works/3673807440
solid-state relay (SSR):
www.flickr.com/photos/linux-works/3681507241/
first shot of PID algorithm running!
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Abstract Stock Market Charts. Zip includes CDR, AI and high-res JPEG files.Map source: visibleearth.nasa.gov/view_rec.php?id=8392
Software used: CorelDRAW X6
Date created: 14.10.2012
Layers of data used: Outlines
or a bar graph.
from last summer. i went crazy shooting absurd numbers of photos while visiting bruce grant in phillie. this one was so restrained and contained... but there's something i like about it.
still have stuff from that visit. i love walking and shooting with good photographers who are good friends!
Based on Aaron's detector, here using a 2x16 LCD, actually my Samsung 16T202DA1J VFD (Vacuum Fluorescent Display).
Upper row gives the averaged value on 10 samples
Lower row gives the signal between the minimal and maximal values observed within those 10 samples.
It's also a good example of a smooth bargraph on a LCD, with custom "chars" if needed, i.e. when both min and max are to be shown on a single 5x7 digit display.
Explanations and code are available here
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Graphs may seem abstract, cold and lifeless, they do however represent real world objects and ideas.
This "bar graph" is a sample of earth from my garden, mixed with water and left to stand in order to separate out the various sized particles.
the new magic setup screen for setting MIN and MAX volume limits once you are in 'normal' control mode.
you enter this screen with a single button press and then you can move both lines around (each on their own) by using 4 arrow buttons or cursor buttons. the program won't let the 2 ends cross each other, of course ;)
once you are happy with your new 2 limits, you exit this screen and the control goes back to the normal screen, showing the current/actual volume setting in a bargraph and the input selector by name.
if you press the MUTE button, the volume slowly ramps down to the mute setting (the lower # you set). unmute and it returns to your previous setting.
and the upper limit helps protect against blowing out your phones, speakers or maybe even your ears ;) or maybe you want to limit how loud it will play early in the AM or late in the PM. the upper limit is also useful for that.
finally, the upper limit lets you get to the 0-db level (point of unity gain) but it also lets you exceed it (if the engine below supports it. the PGA chip does.) this gives the user the option to 'stop at zero' (that way you are only attenuating). audiophiles tend to want their attenuators to NOT have gain, so they can accomplish this simply by setting the MAX level to be 0 or below.