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Automatic light dimmer - need help!

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Alex Brown

New Member
Hi, I want to build an automatic light dimmer for my fish tank lights, so that in the morning they turn on and brighten up over a few hours, and in the evening do the reverse.

I am running what we call, T5 lights. I have 4, on 2 seperate plugs (2 on each AC plug). These are 156w total.

34 39w Power-Glo

I have found this unit, but you have to manually flick a switch to set the reverse. I want to build a dimmer unit that I never have to touch.

Electronic Kits & Projects Information - Quasar Electronics Limited

Thanks, Alex.
 

Menticol

Active Member
Hi, I want to build an automatic light dimmer for my fish tank lights, so that in the morning they turn on and brighten up over a few hours, and in the evening do the reverse.

I am running what we call, T5 lights. I have 4, on 2 seperate plugs (2 on each AC plug). These are 156w total.

34 39w Power-Glo

I have found this unit, but you have to manually flick a switch to set the reverse. I want to build a dimmer unit that I never have to touch.

Electronic Kits & Projects Information - Quasar Electronics Limited

Thanks, Alex.

For your fish safety if better if you buy an already made electronic timer, you can program the time and day of week to turn ON /OFF the lights and forget about it
 
Last edited:

Willbe

New Member
Hi, I want to build an automatic light dimmer for my fish tank lights, so that in the morning they turn on and brighten up over a few hours, and in the evening do the reverse.

I want to build a dimmer unit that I never have to touch.
If these tube lights are dimmable, a triac and a photosensor should do it. I wouldn't use a comparator. There are several threads dealing with this issue.
 
Hi,

electronics aside.

Dimming the lights will probably change the colour spectrum, have you considered that and is it desireable. Certain plant types coral types etc. require a specific ligh spectrum for optimal growth.

I see the lights are for a marine tank, my knowledge is limited to a tropical tank where i know the change in spectrum will severely alter plant growth.


Cheers
Andrew
 
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