I’m looking fro a product that would detect a voltage and light up that can be fitted without the need of an electric supply. Please can someone help?
Thank you in advance.
Neil
Hello @WillIAMs11 and welcome to the RobotShop community,
By “without the need for an electric supply” do you mean a wall adapter? or do you mean power supply in general? In other words, would a rechargeable battery work?
If you can use a battery then you would simply need a voltage sensor, a small microcontroller, and maybe a LED (but the microcontroller will most likely already include one). However, if you use a microcontroller you will need to provide power for it.
An alternative would be using a voltage meter like this:
This way you won’t need any extra components.
I hope this helps!
Thanks so much Geraldine
I’m thinking of something that works on the basis of a “electric detector pen” and just lights up when there is a supply present. Apologies if my original question was not clear.
Is there anything like this system that would just light up rather than take a reading?
Best,
Neil
Oh, I see, that is called an NCV tester (non-contact voltage tester).
Unfortunately, there is nothing in the store that only has the “light up” function. Either way, you can check out the Multimeters & Component Testers section to see if you find anything that would work for you.
I think for your application you’ll need a voltage sensor, arduino and LED. If you do not want to use arduino, you can design your circuit with OMAMPs also. For example, this one
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Thank you for your advice