Hello, my dears, I would like to control a component (in my case a humidifier, for those interested) via a controller. In my case, I only need on/off. I don't need all that bells and whistles with LEDs etc.! Unfortunately, the component has a button that you have to press first to turn the thing…
I'd like to implement the following. As soon as someone walks through a door (I wanted to install a door contact or something similar), I need a short pulse to trigger a memory module to play a sound file. This should simply play without interruption, regardless of whether someone else walks through the door or…
Hello! I'm looking for a relay matrix or similar device that communicates with another device via a single cable (e.g., patch cable, 2-pin cable, etc.) that has the same number of inputs as the matrix relays. When I apply power to input 1 (preferably 12 or 24V), relay 1 switches output 1 to pass. It…
What would be the three advantages and disadvantages of a parallel and series circuit?
What is the function of a transistor and what exactly does it do? And could it possibly be integrated into a ventilation system? If so, what would its purpose be?
Hello, I have some questions about the following circuit: (taken from a datasheet from Texas Instruments) So R1 is simply the resistor for the inverting amplifier, so why is it installed next to C3, which filters the DC voltage? What is C2 for? I've heard it's for filtering high frequencies, but how does it work?…
The circuit: My matrix: M2-M2 and M3-M3 isn't quite right, but I can't quite figure out why. Something's wrong with the signs.
Hello, I would like to use a laminator to transport a strip of paper that's approximately 2 meters long and 5 cm wide. The air rifle target strips are to be transported along a defined path, or with precise control. It's a non-heating laminator that uses 230 volts AC. What control system do I need…
Can someone tell me what the red one means? and why you always write numbers like 11, 12, 24
Hello! I'd like to build a simple circuit. I really don't want it to be complicated, so I'm only using two relays. I also want to play a sound when a button is pressed. Is there a module that can be used without an Arduino and that plays music after a simple 12-volt pulse? A…
I understand all the steps in between and how to get to the result, but what exactly is disjunctive normal form and why is the result in b the disjunctive normal form?
Good day, I want to make my doorbell smart. As soon as the doorbell rings, the ShellyUni should send a message to my Alexa. Where can I switch the GND? I hope the picture quality is still good. Thanks in advance !