I have seen various app notes about some of these things. IIRC Microchip an= d ST both have app notes on some of these. At least one of them has a clip = on O2 sensor, but I think they were using a commercial hospital one as the = application was designed as a lead in to doing hospital instrumentation, bu= t it described what was needed pretty well. I'll try and remember to look o= ut some app note numbers tomorrow. -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of= Art Sent: 05 April 2018 18:22 To: Microcontroller Public Subject: [EE] sleep apnea home test? I've gone through a massive change of lifestyle (diet, weight loss, realiza= tion of the myth that the traditional type doctors, FDA, USDA, American Dia= betes Association, pharmaceutical industry, farming mafia, Congress, health= insurance industry etc) are all lying scum. Many of my health conditions a= re drastically improved, just with a proper diet as specified by Functional= Medicine practitioners in the first 3 weeks of my lifestyle change. I am s= till in recovery, but..... My sleep improved, I am curious whether I have need for my CPAP machine any= longer. I need at least a screening test for sleep quality evaluation, rat= her than a full blown lab type sleep test. Sensors to detect breathing patterns (sound recorder), sleep paralysis (wri= st or leg worn accelerometer) and O2 sat meter (finger clip on) and to data= log the results overnight is good enough for my needs at this point. Has anyone done a PIC program for this purpose? Or maybe someone has a kit?= ? I would interpret my own results, at least as far as a 'preliminary' home test/evaluation. Any ideas? TY Art -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .