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enter image description here

I have 5v relay module . I want to use it to connect e27 bulb adapter but i cant choose any suitable adapter . Pls help me sir. I to find exactly the same as the picture

  • visit a building supply store and go to the electrical department – jsotola Oct 26 at 4:35
  • we have no idea what you are building, so it is impossible to suggest a specific lamp socket – jsotola Oct 26 at 4:36
  • I don't see any adapter on the picture. – Juraj Oct 26 at 8:34
  • im building arduino visitor counter automatic light system but i dunno how to connect my bulb with my relay . Pls help me sir – Afiq Oct 26 at 9:06
  • With wire? The bulb holder you choose has nothing at all to do with Arduino or connecting it to a relay. You choose the bulb "holder" that suits your project. It could be a ceiling rose. It could be a table lamp. It could be a standard lamp. It could be whatever you deem is the right kind of lamp for your lighting design. There is no such thing as an "Arduino" lamp holder. – Majenko Oct 26 at 10:52
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There is no such thing as a "suitable" bulb holder.

Bulb holders are bulb holders. They hold a bulb. They have wires connected to them. They come in different shapes and styles, and that shape and style has nothing at all to do with how they work or how you connect them.

You pick a bulb holder that is the right kind for your project - be that a ceiling rose + pendant combination, a wall mount angled, a table lamp, a standard lamp, a chandelier from Ikea...

If you are looking for something that is identical to that drawing then you may be sadly disappointed. That's a drawing. A representation. The actual device you choose to use is whatever device you deem is the right one for your design.

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Get any E27 bulb holder, and get wire with insulation that's rated for your country's household voltage (probably 120VAC {US} or 240VAC {Most of the rest of the world}, and heavy enough gauge for the current needed for your light bulb, plus some extra capacity for safety.

A hardware store should sell "lamp cord" suitable for wiring a socket for a lamp in your country.

A hardware store should also sell E27 bulb holders.

One thing you might think about is using a store-bought lamp, and wiring your project to switch power to an electrical outlet. You can then get a junction box and and electrical outlet, and wire your project to switch the power to the outlet on and off.

As Majenko said, if you're asking beginner-type questions about how to wire mains connections, you need to get some help. Dealing with household power wires is dangerous if you don't know what you're doing, and you can electrocute yourself, burn down your house, or both.

You should design your wiring, review it with somebody who knows how to do household wiring, build it, and then review the build with somebody with the required skills. (Ideally somebody who's an electrician licensed to work in your country.)

I suggest putting everything in a metal box, and attaching the metal box to an earth ground. Then run the hot side of your mains connector through a fuse rated at slightly more than your required current needs (say 20% more than your calculated current needs.) That way, if you mess up, the most likely outcome will be a short circuit to the box, which will blow your fuse and remove the power to your project without starting a fire. (It won't prevent you from electrocuting yourself however. It only takes a very small amount of current at >= 120 volts to be fatal.)

  • there is a SE for this :-) diy.stackexchange.com – Juraj Oct 27 at 9:38
  • Agreed. The Electrical Engineering SE would be a decent choice. How does one suggest that a post be closed as off-topic and recommend another site? The only site I am allowed to recommend is Arduino Meta. Interchange between Arduino SE and EE SE seems like it would be quite common. – Duncan C Oct 27 at 11:32
  • my link goes to Home Improvement SE. this question doesn't't have engineering level :) – Juraj Oct 27 at 12:04
  • My comment was more specific though. The "off topic" close option has the ability to pick a different Stack Exchange site, but the ONLY site I am able to pick is the Arduino Meta site. Why is that? – Duncan C Oct 27 at 15:09

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