Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I document my learning in order to be able to inspire other people to make ...

With strong reflectance, the output voltage tends towards GND; with weak reflectance, it tends towards Vcc. The resistor wired in series with the infrared LED sets the operating current to a safe ...

Pyroelectric infrared sensors (PIR) are excellent devices to detect human/animal presence with a small form factor and rugged design, for cost-effective surveillance. They are widely used to trigger ...

During tests with DS18B20_test_disconnect.ino I noticed: set resolution to 9 bits + disconnected data line ==> sensor blocks and keeps 9 bits resolution. set resolution to 9 bits + disconnected VCC ...

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