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Interferometro acustico

Trasduttore

MUX esterno

si puo fare un mux 32:8 con 4 SP4T duali, comandati dai piedini MUX

Filtro passa banda

Minima distorsione di fase possibile.

Amplificatore

uC

http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en532298 dsPIC33FJ128GP802, 2 ADC 12 bit https://www.microchip.com/wwwproducts/Devices.aspx?product=dsPIC33EP16GS502 dsPIC33EP16GS502, 5 ADC 12 bit

Mappa pin

Pin Funzione Nome porta sul uC
1 MCLR MCLR
2 CH0 AN0/VREF+/CN2/RA0
3 CH1 AN1/VREF-/CN3/RA1
4 Dati ICSP/CH2 PGED1/AN2/C2IN-/RP0(1)/CN4/RB0
5 Clock ICSP/CH3 PGEC1/ AN3/C2IN+/RP1(1)/CN5/RB1
6 CH4 AN4/C1IN-/RP2/CN6/RB2
7 CH5 AN5/C1IN+/RP3/CN7/RB3
8 V - VSS
9 MUX_0 OSC1/CLKI/CN30/RA2
10 MUX_1 OSC2/CLKO/CN29/PMA0/RA3
11 SOSCI/RP4(1)/CN1/PMBE/RB4
12 SOSCO/T1CK/CN0/PMA1/RA4
13 V + VDD
14 U1RX registro RPINR18 PGED3/ASDA1/RP5 /CN27/PMD7/RB5
15 U1TX RP 00011 PGEC3/ASCL1/RP6(1)/CN24/PMD6/RB6
16 INT0/RP7(1)/CN23/PMD5/RB7
17 TCK/SCL1/RP8(1)/CN22/PMD4/RB8
18 TDO/SDA1/RP9(1)/CN21/PMD3/RB9
19 V - VSS
20 10 uF tantalio verso VSS VCAP
21 PGED2/TDI/RP10(1)/CN16/PMD2/RB10
22 PGEC2/TMS/RP11(1)/CN15/PMD1/RB11
23 DAC left + AN12/DAC1RP/RP12(1)/CN14/PMD0/RB12
24 DAC left - AN11/DAC1RN/RP13(1)/CN13/PMRD/RB13
25 CH7 AN10/DAC1LP/RTCC/RP14(1)/CN12/PMWR/RB14
26 CH6 AN9/DAC1LN/RP15(1)/CN11/PMCS1/RB15
27 V - analogico AVSS
28 V + analogico AVDD

grandezze

grandezza valore unita'
velocita del suono 343 m/s
lambda di 1khz 343 mm
lambda di un periodo a 24ksps 14 mm
1 m/suono 2.91 msec
campioni per 1/msuono 67 campioni

http://web.njit.edu/~gary/728/Lecture8.html