Linked Questions

8
votes
6answers
7k views

PIC16F628A Resetting after relay turned off

I am having problems with controlling a relay with load on it. I am using PIC16F628A. The problem is following: The relay has load. At first it is off. When the microcontroller's output is on, the ...
2
votes
2answers
7k views

Arduino crashes switching 230V relay OFF

Here is my circuit schematic : I need to power ON/OFF a 230VAC fan using a relay. The relay is powered by a 5V DC power supply. Digital pin on the Arduino board open or close the circuit in PNP as ...
2
votes
3answers
7k views

Capacitor sizing for small motors to reduce inductive voltage spikes

I'm working with some small motors for a robot project and I think I had a different component fail due to inductive voltage spikes caused by the motors. The motors are Mabuchi RC-280 which operate ...
4
votes
1answer
3k views

How to calculate Snubber for different load value

We are doing home automation project in that we need snubber for both resistive and inductive load. If we connect less than 5W load(Bulb) it is keep on glowing without switch on. Whether i need to ...
3
votes
1answer
2k views

Relay protection with MOV and RC Snubber

I am going to build a protection circuit for a 240 volt pump motor. It is believed that when the relay cuts out the motor generates voltage back into the relay and burns out the contacts. It has ...
4
votes
1answer
1k views

Relay control of AC motors, handling turn-off kickback

I've been researching how to control a smallish AC-motor using a relay, and more specifically, how to turn an AC motor off using a relay. This is a subject that has been up many times at this site, ...
2
votes
2answers
1k views

RC snubber placement

I would like to ask you about a problem that I have been experiencing recently. I am using a contactor to safely disconnect a hybrid motor starter. The starter is designed to, when tripped with its ...
0
votes
1answer
1k views

Snubber circuit

The circuit is a Single phase motor(120V runs 4.7amps running amps), and a relay to trigger the motor on/off. I'm looking to use a snubber circuit to protect the relay contacts for prolonged use. ...
0
votes
1answer
283 views

Relays to control both directions on tubular motor using Raspberry

I'm using a Raspberry to control a tubular motor for a window blind and I have an issue whent testing it, the relays used to operate the motor got "stuck" and stopped working after a few direction ...
0
votes
1answer
599 views

Brushless motor back and high current and IC

I'm trying to replace the brain of my neato vacuum which is broken. I've already repair a cleaning MOP but with this one I have a problem with the brushless motor which is throwing some party fun in ...
1
vote
1answer
143 views

PCN-112D3MHZ Relay not released

We are facing issue with relay PCN-112D3MHZ. We are switching a FAN of 80 Watt at 220V AC with this relay. we are operating relay with transistor MPSA42. Micro controller is driving this transistor ...