Browse By Tags

  • Want to create a capacitance proximity/touch sensor with a RP2040 Pico board using PIO

    There is nothing quite like solving a problem to help develop new skills. In this case I have found a library solution to what I want to achieve but it is not RP2040 compatible and of course it does not use PIO, which is the skill I am trying to acquire…

  • Sensors used on faucets, trashcans, etc.

    I have a new use for the reflective infrared sensors used on automatic lavatory faucets and the self-opening lids on trashcans. (Hold your hand in front of it to activate.) I've been looking for a module for under $20, battery operated for long periods…

  • Using proximity switches for speed control

    Using proximity switches for speed control – we have seen customers use these techniques to understand and monitor speed of their equipment Speed Rate A proximity switch can be used to measure the speed of a conveyor belt, pump, etc by putting a metal…

  • Using proximity switches for speed control - A few good tricks of the trade !

    Using proximity switches for speed control – we have seen customers use these techniques to understand and monitor speed of their equipment Speed Rate A proximity switch can be used to measure the speed of a conveyor belt, pump, etc by putting a metal…

  • What are NPN and PNP outputs on sensors?

    The outputs of some sensors will behave like transistors, when a sensor senses an object it will trigger the transistor controlling the output (which essentially acts like a switch) and depending on its design it’ll act as an NPN or PNP type transistor…

  • Error accessing 0x13: Check your I2C address

    Hi everyone, Did anyone faced this issue while trying to work with VCNL4000 proximity sensor? Trying to use this code from this repo ( https://github.com/marcoschwartz/RaspberryPiCode ) but when invoking this code: #!/usr/bin/python from VCNL4000 import…