With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.
Tell us about yourself!
if you are going to use this with a raspberry pi you will use the 3v circuit without the LED and 47ohm resistor or you can keep it as is with the LED and resistor. if the pi is powering the circuit you can attach a wire between the collector of the transistor and the LED and put it on one of the input pins and you can put a resistor in the input wire to ensure the maximum current going to the IO pin don't exceed 16mA
so is the button to be activated when a liquid product gets low if so this sensor circuit won't work. what is the dash button doing ordering a product or some modified use i will create a circuit to fit your needs to work with the button
To better help you what does the button do. What does it turn on or off. Is it in series(a switch wired in line with the + or -) with a pump is it a button of a control board(circuit board). Depending on this it could be as simple as an other transistor or a Mosfet transistor (can handle more power) or a relay switch (a lot more power)?
Cordless Lost Foam Cast Cutting Tool - USB Rechargeable
TARDIS-inspired Fitted Wand Box
How to Count Cards, A Basic Introduction to Help Your Odds
how to count cards
List Of **FREE STUFF** For your projects
Turn an old Computer into a web server!
How to Install and Boot Damn Small Linux on a USB Flash Drive
Linux Terminal Basics
Idea: Medium Speed USB Oscilloscope.
Stop using Ferric Chloride etchant! (A better etching solution.)
Covering a model airplane in Tissue
Join 2 million + to receive instant DIY inspiration in your inbox.
© 2016 Autodesk, Inc.