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''Interferometro acustico''

= Trasduttore =

= MUX esterno =

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

* ts3a5017 http://www.ti.com/product/ts3a5017 14-Ohm Dual SP4T Analog Switch 3.3-V/2.5-V Analog Multiplexer/Demultiplexer

= Filtro passa banda =

Minima distorsione di fase possibile.

* http://www.ti.com/sc/docs/apps/msp/journal/nov2000/nov_08.pdf An audio circuit collection, Part 1
* http://www.ti.com/lit/an/sloa096/sloa096.pdf More Filter Design on a Budget

= 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 ==

{|style="color:green; background-color:#ffffdd;" cellpadding="10" cellspacing="0" border="1"
!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 ==

{|style="color:orange; background-color:#ffffdd;" cellpadding="10" cellspacing="0" border="1"
!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