TL;DR A PIR sensor is triggered by itself when using a timer to wait 2 seconds after the sensor is triggered. Without using the timer to wait the sensor works as expected. Background and setup I ...
I am working on a project, and an aspect has come up where I would like to measure (track continuously) the X and Y position of an object across a 2D plane. The object is moved by a person, with the ...
I am working on project that requires me to detect the position of a pen on a piece of normal paper. My first thought was to use 4 IR LEDs on a receiving unit set at the top of the page, and to put ...
I have several of these PIR sensors. I am hoping there might be a way to reduce range/sensitivity to a very small field. Currently they are detecting motion about 15-20 feet away. Does anyone know ...
I am trying to make an infrared proximity measurement device. I want it to be in the range of 10cm or 4" (maybe 15 cm?). The frequency I use is 10 KHz. Here is the circuit I used, except that I have ...
I'm building a small device that will be mounted on the ceiling (along with many other identical ones), facing downwards. I'd like to detect when someone walks underneath it. Due to the constraints of ...