Tagged Questions
1
vote
1answer
46 views
Connecting common of relay with main cable of 240VAC
I trying to control my turntable switch with Arduino. This is a toggle switch with 3 wires one wire is for CW rotation the other one is for CCW and the other cable is main with 240VAC. I am using this ...
0
votes
3answers
69 views
SPDT Relay with 8Pin
I needed a SPDT relay with 240Vac so I bought this relay from Maplin http://www.maplin.co.uk/p/15a240vac-spdt-miniature-relay-n07aw
But I am heaving problem to wire this relay because it has 8 pins ...
1
vote
4answers
93 views
Triple pole triple throw relay
I have a turntable which rotates cw and ccw. This turntable is rotated by AC synchronous motor of 230V. I want to be able to rotate the turntable with Arduino. For this reason I need to control the ...
4
votes
3answers
280 views
Thermistor control of peltier voltage with Arduino (for DSLR chill box project)
I am mildly familiar with electronics, mostly from playing around with electronics kits as a kid. That was a long time ago, though, maybe as much as 20 years ago. I am currently working on a cold or ...
0
votes
1answer
66 views
Help using less pins controlling 8ch relay
I know this has been answered somewhere but can't find the solution online.
I have an 8ch 5v->120VAC relay controlled by arduino and need help using less digital pins. All channels need to be ...
1
vote
2answers
102 views
Interfacing without an Interface
I have a project where I need to interface with a machine that was never built to be interfaced with.
I basically want to programatically press physical buttons on the machine(critical) and also ...
0
votes
1answer
139 views
Which transistor should I use in place of a 5V relay to adjust brightness of lights (230V) with the Arduino?
I want to control brightness of lights (230V) with the Arduino, and I know that relays will just switch the lights on/off. If you have the circuit or any idea about which transistor to use and how to ...
3
votes
3answers
400 views
Solid State Relay Vs Triac
The general and simplified view of my circuit is something like that:
Using a microcontroller I want to select between two sound signal sources (S1 or S2). S1 is a signal that comes from a ...
2
votes
1answer
121 views
How can I control brightness of a CFL with a microcontroller?
I'm new to electronics and just turned on and off appliances with an Arduino and relays. Now I also want to control the brightness of a CFL with an Arduino as I controlled the brightness of a LED. So ...
1
vote
3answers
241 views
NPN BJT Relay Circuit will not turn off
I'm applying a 3.3V signal with my Raspberry Pi to the base of an NPN transistor to activate a SPDT 6V relay (relay data sheet, model G2R-1-S-DC6(S)). The relay pickup/dropoff voltage is 4.4/0.9V. ...
1
vote
1answer
155 views
Measure on/off pulse of relay (with reversed polarity) with a MCU?
Below I have the following (simplified) circuit:
What I want is to measure (monitor) every time the relay switches on and off. The pulse is around 3V and for 32ms.
The problem is that the voltage ...
0
votes
0answers
89 views
Arduino with GSM shield and relays
I have some machines operated at 240V and would like to remote control them. Some factory customized boards were made and are currently in operation, but they are expensive and I am seeking for lower ...
0
votes
1answer
122 views
Choosing Screw Terminals for connecting Arduino to other components
For connecting a 16 channel relay board to 16 devices running off 24VDC, and for connecting the relay board to Arduino, I am thinking of using screw terminals where one side of the terminals connect ...
3
votes
2answers
450 views
How to go about turning on/off a coffee machine with an Arduino?
I have a coffee machine that has one button. When this button is pressed, the coffee machine will do its thing and automatically shut off after a certain period of time.
I need to use a signal from ...
2
votes
1answer
100 views
Arduino powered relay behaving oddly
I bought a spark fun inventors kit in order to learn about arduino. I am attempting to complete circuit 13 http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Kits/SFE03-0012-SIK.Guide-300dpi-01.pdf .
It ...
1
vote
1answer
429 views
4 Channel Relay Module Set to LOW activates relay?
I seems that my 4 channel relay module is acting the opposite of how I thought it should act. When I do use the Arduino "digitalWrite(relay, HIGH);" essentially turning power on to the relay, the ...
1
vote
1answer
351 views
How do run a 120Vac water pump using Arduino starter kit supplies
I'm very new to EE so forgive the simple question. I have a small water pump 120Vac that I want to turn on and off via my arduino. I have the arduino starter kit as well as a 12v relays.
I've tried ...
0
votes
2answers
175 views
Do I have a bad relay module?
I'm aware that there have been many questions about this series of relays, but I've read them and still can't get this working.
I have this version, with 4 relays.
I'm currently wiring:
5v Arduino ...
1
vote
2answers
240 views
Can I use a reed relay instead of a reed switch with an Arduino to detect when a magnet is close?
I'm using this device:
http://www.radioshack.com/product/index.jsp?productId=2062478
I found this on how to wire it to an Arduino:
...
1
vote
2answers
346 views
LCA717 SSR connected to Arduino Digital Pin
I am trying to figure out how to go about using this LCA717 SPST-NO relay in my project. I will be sending 12V (car voltage) to a radar detector and I want to be able to turn it on/off whenever via ...
1
vote
2answers
188 views
MOSFET Relay (G3VM-21AR/DR) connected to Arduino Digital Pin
I am trying to figure out how to go about using this Omron MOSFET relay in my project. I will be sending 12V (car voltage) to a radar detector and I want to be able to turn it on/off whenever via the ...
0
votes
1answer
194 views
Difference between power on Arduino Pin 13 and Other Digital Pins
I am using Arduino Digital Pins to turn on and off a relay. Now I am using the 5V and GND from the board and supplying this to the relay. This power is turned on/off using a NPN 2n2222. This ...
1
vote
1answer
319 views
Socket wiring to relay + Ardunio / Pi
I’m working on a personal project at the moment and needed a small amount of electronics help. What I am building is a RaspberryPi/Arduino connected to wall plugs (which is not being fitted to the ...
1
vote
2answers
293 views
5V SPDT relay to a MOSFET using Arduino
I am trying to find the correct components in order to achieve the same results with a MOSFET that my current 5V relay board does.
Reason being is that I don't like all the "clicking" the relay makes ...
3
votes
1answer
172 views
Multiplexers used as a switch seem to “leak” when power is cut
Description
Attempting to build a device using the Arduino that will allow me to remotely restart a cluster of desktop computers that I have. The device works by momentarily connecting the RESET ...
4
votes
4answers
287 views
Will I need diode if I add button to this schematic?
Here is some pre-story. I removed ignition switch in my car which had five wires connected to it (accessories, ignition, starter, +12V for ACC&IGN, +12 for STARTER), and connected the wires to the ...
4
votes
1answer
205 views
Is there not enough power for relay?
I can't get the relay to work in my example. Transistor gets really hot.
When connecting&disconnection relay wire between diode and transistor and I can hear soft click from relay. But when ...
4
votes
5answers
1k views
Need help calculating resistance for transistor base
I have 3 12VDC/40A automotive relays (datasheet) that I want to use with my Arduino.
Based on the tutorial I am following (link) I need transistor, resistor, and diode. I am not an electrical engineer ...
1
vote
3answers
5k views
Control the lights both with wall switch and arduino
I am starting to build new house and want to add some home automation features, for now, turning lights and sockets on and off.
i bought arduino mega, ethernet shield, current sensors to see if the ...
4
votes
1answer
480 views
Using/Charging a backup battery in a 12VDC circuit
EDIT: I've revised the circuit in response to comments from Andy aka. I have also updated my questions to make it more clear what I am asking. I'm leaving the top paragraphs for completeness' sake.
...
4
votes
2answers
1k views
Trouble on switching a 3V relay with Arduino digital pins
I am using the Arduino Ethernet with POE and I am in trouble when I have to enable my relay by using a digital pin. What I would like to make is to start a motor by using a relay, which relay is ...
0
votes
1answer
567 views
using relay to switch between video outputs
Hey all I have a simple question... would I be able to send a video signal (composite) to each relay per camera? Reason being is that I only have one video input but need to be able to use 2 cameras ...
0
votes
1answer
183 views
Relay Contact Rating
I have a HJR-4102E-L-05 relay that is has a contact rating of 3A/120VAC. I was curious if it would be able to switch a 100 watt 120VAC lamp. I know that the relay is rated to 360 watts. My concern is ...
1
vote
2answers
611 views
How can I use relays and deal with reverse polarity with the Arduino?
I have a toy car that I wanted to make autonomous.
It has a motor for rear drive (seen in the bottom of the photo hidden in the gear-box) and a motor for rack and pinion steering (located just ...
3
votes
2answers
369 views
Controlling forward/reverse current using arduino & shift registers
I'm trying to control multiple solenoids (home made) using a shift register controlled by an Arduino.
Ideally I want to be able to direct them all together either inwards or outward using the current ...
0
votes
2answers
621 views
Low power method to turn Raspberry Pi on or off using an Arduino
I want to use an Arduino to control power to a Raspberry Pi.
The power supply to this system is a solar panel with rechargeable cells, and the Arduino will turn the Pi off to preserve power in ...
4
votes
1answer
1k views
Relay takes time to close
I am trying to control a relay from an Arduino compatible board. When I try to activate the relay from the Arduino it takes at least a second to switch closed and sometimes does not switch closed at ...
1
vote
0answers
328 views
Arduino - Solenoid Valves and Pumps Control (Relay Shield & Motor Drive Shields)
I’m trying to control two Diaphragm Pumps (12VDC/4.3W) and five Solenoid Valves (24VDC/10W) using Arduino Uno & Arduino Display Module.
I know there are many different ways to control these ...
3
votes
1answer
255 views
Replacing a Wired Controller with an Arduino Uno: Relay Alternative
So, I have a simple robotic arm that has a wire controller you plugin into it. The controller has 8 pins. I haven't played with it too much but I know that the far ends are power sources and the ...
7
votes
3answers
1k views
How can I safely connect both Arduino and a 120V 10A circuit?
I'm building a thermostat, and the idea is to have it fire one of two 120V 10A circuits (one to heat, one to cool). I have two of these modules for the relay and I ...
2
votes
2answers
197 views
Need help on Arduino and relay control
I am trying to get my Arduino to control a relay without luck. I'm able to see the LED flashing on the relay board indicating that the relay should be throwing, but the circuit is not being closed. ...
0
votes
1answer
143 views
What is the analog pin for on a Phidget 3051 Dual relay board?
I recently purchased a Phidget 3051_1 Dual Relay board with the intention of using it to switch on and off flourescent lamp ballasts (20W tubes) over a fish tank by connecting the relays to 110VAC and ...
3
votes
4answers
4k views
Can an Arduino use a 12 V relay?
So I wanted to play around with relays and clearly got it wrong even before I got started. I wanted to control a 12 Volt fan - thinking that it would have a capacity of 12 V to control.. But now I ...
0
votes
0answers
219 views
Safe approach for 120v power box w. 2x Dimmable outlets?
I'm looking to create a 4 outlet AC box (2 of which dimmable by arduino) and am intending the merge these two tutorials.
Although i'm not a certified electrician I do have experience with home ...
0
votes
1answer
115 views
Peristaltic pump
Can a peristaltic pump push air? Let's assume you have a 2m of tubing, and you pump a bunch of water through it. Can you remove the tube from the water reservoir so it is open to the air, and ...
1
vote
1answer
457 views
Soft-Starter PWM Noise
I have developed a soft-starter for a project of mine. I am using an Arduino Uno to generate PWM to an OAC-5 relay that turns on and off the voltage across my bridge rectifier.
Here is a simple ...
1
vote
3answers
4k views
How do I control a two 12VDC 10A motors using an Arduino?
I am new to arduino and electronics in general but I need some help on a project I am working on. Essentially I want to be able to control the state (on/off) and direction of two linear actuators that ...
5
votes
2answers
726 views
How to process voice commands using ATmega or Arduino?
For a project I need to start my PC using voice command. I thought to made up an voice controlled system to turn on my PC. As far as I know, when I press the turn on button-2 pin's on the motherboard ...
0
votes
2answers
953 views
SainSmart 5V 4 Channel Relay momentary switch
I am wanting to hook this relay up here:
What I am wanting it to be hooked to (output) is the PWR and reset switch on a PC motherboard to act as a momentary switch:
I am also wanting to hook one ...
2
votes
1answer
3k views
Use power line to communicate between devices - simple communication
So I am a google programmer getting interested in hardware hacking.
What I want to do:
Use Arduino or a similar microcontroller to control the lighting in my house, of course for as cheap as humanly ...
