relay

Hello fine people! I've got a 220v AC solenoid valve which I want to control through a 5v relay module with rasp pi. As I've understood, I have to add an RC snubber circuit in series in order to protect the relay. And this is where I need help. I need to figure out what resistor and what...

hi everyone, not sure if this is even possible, maybe someone knows of a way. I have a IR blaster that sends at 38kHz and a device that has a 37kHz infra red system. is there a IR convertor \ relay that can make the receiving device (cable set top box) accept the commands of the sending...

Hi! Got a problem with my auxiliary heater. I connected an auxiliary heater to my car and everything was working great. However, when I added the wiring harness for the car fan, it won’t work. I can only measure 5v at the relay, which is odd since it should be 12v. In addition to this, the car...

I'm busy with a project that uses a Raspberry Pi zero and a relay. I've tried 2 relays and neither worked. I'd like some help to understand how to choose the correct relay, as well as which one will work. First, I used this one: SSR-100DA. I connected the input to the Pi, and the output to my...

Hi Everyone, Project Goal: Feed my fish! Tidy up and get rid of conduit and wires running eveywhere! Current Setup: I have 12 Fish Feeders powered by a DC motor, and I run all the wires run along the walls in conduit back to the controller. Each color represents one fish tank. ("1-4" feeder...

Hello, Newbie question I have a device that have two SPST relays that I control. From these relays, I would like to control the ON/OFF states of two LEDs (red and green) and a high/low brightness state. This gives four possibilities: Red High brightness Red Low brightness Green High brightness...

Hello We designed this Snubber Circuit with this varistor in parallel but we have a problem in a small load. Even when the relay is disconnected, a small current is flowing. For example, when connecting a phone charger, the phone screen keeps turning on and off. The varistor is Hongzhi Elec...

Background I'm working on a seismic alert network and seismograph station at my school in Puerto Rico. We're building a solar system for the system to continue running during a potential seismic event. The system only consumes about 10 Watts, but with the satellite internet equipment it might go...

hello everybody ... for a project i want to use the pneumatic for sorting purpose is there any solenoid valve pneumatic with that features ... ? if not whats the fastest relay i can use for my project ? is it the simple way possible that complete my project without relay or solenoid valves ???

Hello. im seeking some help designing a seemingly simple circuit. I’m not experienced enough with this so I’m hoping you can assist. It is in an automotive application. 16vdc electrical system with common ground. I have a normally open ground that is closed when engine rpm rises to a chosen...

I am looking to install a delay timer in a simple 12v circuit that supplies a well pump (6A) in a garden powered from a solar charged battery. I want the pump to run for 10mins when a circuit is closed on a toggle switch. If the pump is to restart after it has stopped, the toggle will need to...

Hello, i've got a newbie question, i hope some of you more experienced guys can give me an answer. I've recreated a simple circuit, that closes relay contacts using optocoupler and transistor, just for fun and i've found out that it's not working, after some time i've succeded to get the circuit...

Yup, you read that right... paddle shifters on a golf cart :cool: ***Disclaimer*** Out of respect for you boys and girls I have spent quite some time trying to figure this out before coming here so as to refrain from a drive-by post where the answer could have been found had I tried a little...

Hello, I am in the process of designing an interlock for two operations. 1. Operated by Manual Switch 2. Remotely through an Automatic Switch (Can't be controlled Manually) If user turns manual switch then operation should start. (In this case, if someone activates automatic switch it should...

A 20kV, 100VA generator is protected by differential protection. 70% of the winding will be protected against the phase. What is the value of resistance to be located at the "Neutral to Ground" protection if the relay operates 30% out of the balance current? Below are my steps to the solution...

Hi I'm new to this site and yes I have very basic knowledge with electronics, I'm hoping someone here might be able to help me, I'm trying to modify my sons car by installing projector headlights but the problem I'm having is converting the lights from a dual filament (H4) to a single filament...

Hi Friends, Myself a very beginner in electronics and I'd like to build a design to control an AC device. When activating a momentary push button, it should turn on the device. When pressing another button, it should turn off the device. But I'd like to make this without Arduino or any MCU. I've...

I’m pretty much a noob when it comes to hardware and for awhile I have been trying to figure out how to design a PCB layout. The Problem I have is trying to figure out the values for capacitors and resistors how to connect them with the other parts (like pull up resistor, bypass capacitor etc...

Hi, I know this is a simple one for most of you but I’m quite new to this so please be gentle. I have an old pallet wrapper that I would like to automate. I still want to be able to use it in it’s current form so was going to start with a “manual/ auto” selector switch after the turntable has...

Hello everyone! I'm currently designing a simple circuit which is working as I want but I'd like to make sure that I haven't done any dumb mistake. That's why I'm asking here. I'd like a signal to switch ON a MOSFET in order to activate a relay. This signal is usually low (0 VDC) but sometimes...