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LED Pulse Sensor (PPG) for Arduino
Are the standard diodes near each LED for ESD protection? Which diodes should I use?
What is IC1B connected to? Where are the + and - audio inputs connected?
Wow. I was just going to eat the $2.95 fee to become a "premium member" so that I may download your files. Funny, it's billed annually. $35.40!!?? Out of your mind much??!! I will do all that I can to drive traffic away from instructables.com as it's a super bait and switch rip-off.
It's too bad you put your project on Instructables. Even though I'm a member I can not download your files if I don't pay for a premium membership here. Maybe you can put your files on Github???
what do you do after u get an output from the filter....plz explain
Creating a smart-controlled turntable driver
9 Channel "pure analog" graphic equalizer
Turntable made of 100y old german oak
Professional RIAA Equalization with analog electronics
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