I am looking for a way to control a very bright light (100,000 lumins) that runs at around 3v. All the DC DC SSRs I see have a lower output voltage of 5v. Is there a SSR out there that will work at low voltage like this. Is there another way to do this?
This one works at 3V. Change country for your local Amazon
https://amz.run/9T24
So, what is the problem? 3 volts is less than 5 volts. The real parameter you need to tell us is how much current at 3 volts are required by the bright light.
The output specs on the SSRs I have seen is 5v-60v so it does not look like these will work. One of the lights I am interested in runs at 6 amp hrs.
Why not use a mechanical relay?
Here is one
OR
Thanks Jim. If a mechanical relay is less expensive, can you recommend one?
Mechanical relays can be cheaper but you need a driver or a "relay board" with a relay and driver. And most relay coils are 5V or more.
It's not clear if you are switching-controlling AC or DC. Solid state relays are usually one or the other.
FYI - 6A is current. 6Ahr is battery capacity (energy). i.e. 6A for an hour or 1A for 6 hours, etc.
There is this type which is popular with arduino users
Some have complained about reliability but they are easy to use and cheap.
If you want something with good reliability you will have to build your own circuit with a relay like this
"Control". Define.
Turn it on or off depending upon illumination of another light that is about 400 feet away.
Strange.
Perhaps you could post a link to the light you intend to use?
I found this one which does have a voltage and watt spec that draws 5.4amps.
So your plan is to cut that open somehow and somehow connect to the pushbuttons if that is indeed possible?
How do you know it uses 3V?
I will remove the battery pack and run leads back to the light. I will set the light to the mode I want to use by hand. It will be a stationary installation.
The 3.7 V spec is in the description. I assume that they are in series with a voltage regulator in the circuit within the light.
It also says this
Batteries 1 AAA batteries required. (included)
Electrical specifications you see on Amazon may or may not be correct.
I would contact the seller first.
Typical of product descriptions by Chinese vendors on Amazon. It is also suspicious because a single AAA does not put out 3.7V. You can never be sure of what you are getting based on their description. If I buy this one, I can remove the battery(ies) and measure the voltage. It is returnable so there is no risk other than how well it is built.
Once the battery is disconnected, will it retain the last mode you set it to?
I hope not to have to take the light apart and take full control. I may buy a cheaper one to use as a test bed. Many of these lights have the same selection of modes.
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