Timer Circuit design help please!!

Nicholas's picture

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Joined: Oct 17, 2019

Replies: 0
Timer Circuit design help please!!
October 17, 2019 - 5:57am

I have an outdoor strip light from Wide Loyal (120V power supply, 12V circuit, ~11.0W) that I want to put on a conditional timer. Conditions are as follows:

-Indoor light switch turns on and off light

-Proximity switch at gate for when the gate opens, it turns the light on for 2 minutes even if the indoor light switch is off

-Motion sensor at front door (around the corner from where the gate is) that turns on the light for 2 minutes even if the indoor light switch is off

-Circuit will be outdoor subject to -40°C to +40°C temperatures in a moisture proof box

I have seen timer relay boards online, but I want something where I didn't need a seperate 12V supply. Is there such a thing? Forgive me if this request sounds dumb, I am very new to circuit design, but am looking to learn.

 

Thanks in advance for all of your help!!

Nick

Aswinth Raj's picture

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Joined: Aug 16, 2016

Replies: 944
Industrial indoor timer relay
October 21, 2019 - 5:14pm

Hi Nick,

I can see two options here, one buy a timer relay module and connect it with your light. this relay will work directly from 110V/220V AC and will be very compact an example would be DT600 (SELEC). You can see how it woks here

https://www.youtube.com/watch?v=YZrKieRo-xE

OR another cheap way would be to buy an external AC/DC converter and relay module and use with a controller like arduino. The former will be expensive but very reliable 

And no the question was not dumb.