[sdiy] Very cheap SPI pressure sensors.. anybody ??

[Mr&MrsAccount]

I know... you're building the first Digital Harmonica!
Will it have MIDI ?
Harry
----- Original Message -----
From: Jean-Pierre Desrochers <jpdesroc at oricom.ca>
To: synth-diy at synth-diy.org
Sent: Fri, 19 Mar 2021 11:09:35 -0400 (EDT)
Subject: [sdiy] Very cheap SPI pressure sensors.. anybody ??

<!--

@font-face
	{font-family:Calibri;
	panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
	{font-family:Tahoma;
	panose-1:2 11 6 4 3 5 4 4 2 4;}

p.MsoNormal, li.MsoNormal, div.MsoNormal
	{margin:0cm;
	margin-bottom:.0001pt;
	font-size:11.0pt;
	font-family:"Calibri","sans-serif";
	mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
	{mso-style-priority:99;
	color:blue;
	text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
	{mso-style-priority:99;
	color:purple;
	text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
	{mso-style-priority:99;
	mso-style-link:"Texte brut Car";
	margin:0cm;
	margin-bottom:.0001pt;
	font-size:11.0pt;
	font-family:"Calibri","sans-serif";
	mso-fareast-language:EN-US;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
	{mso-style-priority:99;
	mso-style-link:"Texte de bulles Car";
	margin:0cm;
	margin-bottom:.0001pt;
	font-size:8.0pt;
	font-family:"Tahoma","sans-serif";
	mso-fareast-language:EN-US;}
span.TextebrutCar
	{mso-style-name:"Texte brut Car";
	mso-style-priority:99;
	mso-style-link:"Texte brut";
	font-family:"Calibri","sans-serif";}
span.TextedebullesCar
	{mso-style-name:"Texte de bulles Car";
	mso-style-priority:99;
	mso-style-link:"Texte de bulles";
	font-family:"Tahoma","sans-serif";}
.MsoChpDefault
	{mso-style-type:export-only;
	font-family:"Calibri","sans-serif";
	mso-fareast-language:EN-US;}
@page WordSection1
	{size:612.0pt 792.0pt;
	margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
	{page:WordSection1;}
-->I'm looking for very cheap SPI pressure sensors (around $1.00 a piece or less)For a future project. The pressure value doesn't matter but the size and cost do.I will need around 90 of these sensors. For example I found this:BMP180 GY-68 GY68 3.3V 5V BMP-180 Temperature Pressure Sensor Module Barometric IIC I2C Interface Sensor Module Replace BMP085  $0.90CADhttps://www.aliexpress.com/item/32832330585.html?src=google&albch=shopping&acnt=708-803-3821&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=7386552844&albag=80241711349&trgt=743612850714&crea=en32832330585&netw=u&device=c&albpg=743612850714&albpd=en32832330585&gclid=CjwKCAjw9MuCBhBUEiwAbDZ-7mU2hTS0J2DLxvsPsj8F40L-zV8vtApw9ds_ks1c2Qjg7dLiKgsy3RoCq-EQAvD_BwE&gclsrc=aw.dsBut because I need 90 devices and the BMP180 is I2C and has only one address value
I would need somekind of multiplexer to address 90 devices (one at the time obviously).So.. SPI devices would fit better here. One other possibility would be to use this type:MPS20N0040D MPS20N0040D-D Sphygmomanometer Dip Air Pressure Sensor 0-40kPa DIP-6 For Arduino Raspb   $0.74CADhttps://www.aliexpress.com/item/4000354356373.html?src=google&albch=shopping&acnt=708-803-3821&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=9604672960&albag=100679328364&trgt=296904913880&crea=en4000354356373&netw=u&device=c&albpg=296904913880&albpd=en4000354356373&gclid=CjwKCAjw9MuCBhBUEiwAbDZ-7kff0q--0F6YUo73aVqE_HAtqkRyIslFbEMRTWz7QICR2szctlC7zxoCrMUQAvD_BwE&gclsrc=aw.ds But I’ll need some analog IC to manage the output..Again the part’s pressure specs value do not matter.. I will manage a way to use it.but the size and cost do. So far the best would be a SPI equivalent of the BMP180 IC..Let me know if someone googled something I did not spot ! JP
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20210319/7bb174cb/attachment.htm>