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transistor instead of a relay??

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Ricardoco

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i am looking to switch a 240vac 1 amp pump on and off upto 30 times per min 24hrs a day, i have looked at using a relay but for long term use the noise and the life of the relay would make me choose another method , i understand this could be done with a transistor would anyone be able to help me with a component sugestion and if it is not too cheeky a diagram ...thankyou in advance Rick :D
 
thankyou...your the man.. :D
 
Ricardoco said:
i am looking to switch a 240vac 1 amp pump on and off upto 30 times per min 24hrs a day, i have looked at using a relay but for long term use the noise and the life of the relay would make me choose another method , i understand this could be done with a transistor would anyone be able to help me with a component sugestion and if it is not too cheeky a diagram ...thankyou in advance Rick :D

You don't switch big stuff off the mains every 2 sec by design. A small motor, especially a pump, takes a lot of surge current to start up. This makes a lot of annoying line noise. It will also stress the mechanical components and may cause either the motor or the pump to fail prematurely.

I would suggest you either go with a motor which can be speed controlled, or lower your turn-on period to something more practical. What are you trying to do?
 
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