La Fontaine Du Campus Est (The Bubbler of East Campus) is a computer-controlled, servo-actuated, LED and halogen-lit, sump-pump powered baptize fountain. It appearance bristles streams of baptize that can anniversary be alone controlled (on/off) as able-bodied as pivoted (90 degrees of freedom). Anniversary beck of baptize is lit by a halogen light. The ambit of the bubbler has RGB triplets that can accomplish assorted animations. The bubbler and baptize are additionally aflame by eight Luxeon LEDs. The absolute arrangement is controlled by a PC that sequences through a choreographed book alleged a ShowFile. Three ambit boards act as an interface amid the bubbler and the computer: a valve ascendancy board, an LED ascendancy board, and a servo ascendancy board. All but the aftermost were custom congenital for La Fontaine Du Campus Est.
The aloft diagram shows the access amid the three ambit boards that run the bubbler devices, the Bubbler Director PC, and the bubbler accouterments itself.
The base of the fountain. Blue altar with absorbed hoses are the abrasion apparatus solenoids acclimated to about-face anniversary bill on and off.
Fountain-side electronics are army in a closed box beneath the bubbler surface.
The valves to about-face the nozzles on or off are activated by relays. The halogen lamps that point up the baptize streams are additionally activated by relays. The valve/halogen ambassador lath is a custom ambit that interfaces via USB and activates these anterior endless on demand. There is additionally congenital argumentation that ensures a abatement valve is consistently in the able accompaniment of operation. The ambit is based about a PIC 18-series microcontroller and an FTDI USB-UART converter.
Downloadable valve/halogen ambassador antecedent code:
Valve/Halogen Ambassador Source
The LED ambassador is advised to serve as a accepted purpose lighting controller. It controls the 24 fountain-mounted LEDs as able-bodied as the eight Luxeons. All lighting animations are congenital into the onboard memory. A computer interfaces with the lath and tells it which action to play, and with what color(s).
The lath can drive 24 aerial acuteness LEDs (up to 50 mA each) and 24 high-current Luxeon LEDs (up to 3 watts each). The 48 outputs are controlled via a USB interface or PS/2 analyst (designed to affix to a ambit mouse). Several accent ons and LED indicators are included on the lath for debugging and added features. In addition, the arrangement can be broadcast and alike daisy-chained by application the UART blemish header. The accessory is based about a PIC 18F2455 microcontroller.
Downloadable schematics and antecedent code:
Fountain LED Ambassador Lath Schematic
Fountain LED Ambassador Source
The nozzles affix to abrasion apparatus solenoid valves. These about-face the baptize beck on or off. These valves, in turn, are accompanying calm and all augment into a distinct sump-pump output. In accession to the bill ascendancy valves, one added valve acts as a abatement valve. It opens whenever all nozzles are off and the pump is on.
The nozzles axis back the servo they are absorbed to moves. The servos are all apart controlled by the Bubbler Director.
Slots in the aluminum top were cut on a comminute to acquiesce for bland baptize jet pivot. Anniversary jet can axis 90 degrees (45 to anniversary side). The adjoining halogen ablaze illuminates the baptize stream.
Brackets authority servos to the top plate. The servo pivots the baptize nozzle, acceptance for affective baptize displays.
The academician of the arrangement is a PC with its three custom USB boards. The Bubbler Director is a copse anatomy with an aluminum faceplate that houses all the ability electronics, ascendancy boards, monitor, PC, chiral ascendancy switches, and the VFD status-indicator. An automated joystick allows an abettor to use the PC. Switches acquiesce chiral ascendancy of anniversary baptize jet.
Downloadable antecedent code:
Fountain Director Source
A appearance is started by affairs a batten switch. The about-face is fabricated of copse and bisected of a nine-iron. It connects to the Bubbler Director via the consecutive port.
The bubbler was apparent during MIT East Campus Dorm’s “Bad Ideas Competition” in February 2008. The aboriginal video on this folio shows clips of the ten-minute continued mix that was shown.
Alexander Papageorge digging the 70 aboveboard bottom baptize pit.
RJ Ryan putting final touches on the music sequencing software.
Amy Qian demonstrating the accent of acceptable assurance practices.
Rob Gens troubleshooting the aboriginal bearing LED ablaze controller.
Reid Kleckner acquisition the baptize breeze tubing.
Zack Anderson (me) soldering the valve/lighting ascendancy board.
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