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http://web.njit.edu/~gary/728/Lecture8.html
''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 =
== Mappa pin ==


{|style="color:green; background-color:#ffffdd;" cellpadding="10" cellspacing="0" border="1"
{|style="color:green; background-color:#ffffdd;" cellpadding="10" cellspacing="0" border="1"
Line 25: Line 47:
|8||V -|| ||VSS  
|8||V -|| ||VSS  
|-
|-
|9||Xtal 32MHz|| ||OSC1/CLKI/CN30/RA2
|9||MUX_0|| ||OSC1/CLKI/CN30/RA2
|-
|-
|10||Xtal 32MHz|| ||OSC2/CLKO/CN29/PMA0/RA3  
|10||MUX_1|| ||OSC2/CLKO/CN29/PMA0/RA3  
|-
|-
|11||Xtal 32.768 kHz|| ||SOSCI/RP4(1)/CN1/PMBE/RB4  
|11|| || ||SOSCI/RP4(1)/CN1/PMBE/RB4  
|-
|-
|12||Xtal 32.768 kHz|| ||SOSCO/T1CK/CN0/PMA1/RA4  
|12|| || ||SOSCO/T1CK/CN0/PMA1/RA4  
|-
|-
|13||V +|| ||VDD  
|13||V +|| ||VDD  
Line 39: Line 61:
|15||U1TX RP 00011|| ||PGEC3/ASCL1/RP6(1)/CN24/PMD6/RB6
|15||U1TX RP 00011|| ||PGEC3/ASCL1/RP6(1)/CN24/PMD6/RB6
|-
|-
|16||U2RX registro RPINR19|| ||INT0/RP7(1)/CN23/PMD5/RB7
|16|| || ||INT0/RP7(1)/CN23/PMD5/RB7
|-
|-
|17||U2TX RP 00101|| ||TCK/SCL1/RP8(1)/CN22/PMD4/RB8
|17|| || ||TCK/SCL1/RP8(1)/CN22/PMD4/RB8
|-
|-
|18||Carrier Detect|| ||TDO/SDA1/RP9(1)/CN21/PMD3/RB9
|18|| || ||TDO/SDA1/RP9(1)/CN21/PMD3/RB9
|-
|-
|19||V -|| ||VSS
|19||V -|| ||VSS
Line 49: Line 71:
|20||10 uF tantalio verso VSS|| ||VCAP
|20||10 uF tantalio verso VSS|| ||VCAP
|-
|-
|21||PTT In|| ||PGED2/TDI/RP10(1)/CN16/PMD2/RB10
|21|| || ||PGED2/TDI/RP10(1)/CN16/PMD2/RB10
|-
|-
|22||PTT Out || ||PGEC2/TMS/RP11(1)/CN15/PMD1/RB11
|22|| || ||PGEC2/TMS/RP11(1)/CN15/PMD1/RB11
|-
|-
|23||DAC left +|| ||AN12/DAC1RP/RP12(1)/CN14/PMD0/RB12
|23||DAC left +|| ||AN12/DAC1RP/RP12(1)/CN14/PMD0/RB12
Line 57: Line 79:
|24||DAC left -|| ||AN11/DAC1RN/RP13(1)/CN13/PMRD/RB13
|24||DAC left -|| ||AN11/DAC1RN/RP13(1)/CN13/PMRD/RB13
|-
|-
|25||CH6|| ||AN10/DAC1LP/RTCC/RP14(1)/CN12/PMWR/RB14
|25||CH7|| ||AN10/DAC1LP/RTCC/RP14(1)/CN12/PMWR/RB14
|-
|-
|26||CH7|| ||AN9/DAC1LN/RP15(1)/CN11/PMCS1/RB15
|26||CH6|| ||AN9/DAC1LN/RP15(1)/CN11/PMCS1/RB15
|-
|-
|27||V - analogico|| ||AVSS
|27||V - analogico|| ||AVSS
Line 66: Line 88:


|}
|}
== 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

Latest revision as of 11:47, 23 September 2015

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

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