"...connect to 110/230VAC or 12/36VDC to the same contacts." You can get power supplies that will handle a 90 - 240ACV 50Hz - 60Hz input and you can get supplies that will handle a 12/36V DC input but to use the same connector for the whole range would need a custom PSU design. It would probably be simpler to have one connector with two sets of pins, one for AC mains, the other for low voltage DC and design the internal PSUs to accept a low voltage output from some sort of mains step down power supply (or supplies) or from the low voltage DC input pins. This might be better than two input supply connectors because with a single connector, you can't accidentally plug both supplies in at the same time. For individually isolated mains to low voltage DC supplies you could look at these: [http://myrra.com/electronic-transformers/](http://myrra.com/electronic-transformers/) On the other hand, having an external low voltage DC supply makes it more difficult because you then need to use separately isolated low voltage supplies (such as flyback or forward converters, which means yet more transformers, or modules) unless each DC input is itself from a separately isolated source.

Thank you. I've sent you PM by the way yesterday. I think I'll be fine with a simple 90 - 240ACV 50Hz - 60Hz input supply. There is always 230V in the places where it is supposed to be used. Can you show an example of such a single part power supply? Or you meant power supply as a schematic block?

Can you show an example of such a single part power supply?" [https://uk.farnell.com/search?st=myrra%205v%20power%20supply](https://uk.farnell.com/search?st=myrra%205v%20power%20supply) [https://uk.rs-online.com/web/p/pcb-transformers/8695025/](https://uk.rs-online.com/web/p/pcb-transformers/8695025/) The advantage of such units is that they already come with the necessary safety approvals and some level of confidence in their EMC conformance. Designing your own mains input SMPS can be an expensive approvals minefield. :( "Or you meant power supply as a schematic block?" Try SHIFT+F searching for **myrra**. Check the symbol and footprint vary carefully against the manufacturers datasheet. Copy and edit to make your own if necessary. The Tutorial shows the basics of symbol (Schematic Lib) and footprint (PCB Lib) creation. Section (2.3) in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a) goes into much more detail.

This is what I wanted. Thank you. Those blocks cost more than I expected. But considering it has protection circuit and such, might be simplier solution.

@[Sergey Romanov](https://easyeda.com/sergey.romanov) A more safer solution is to not let 110/220VAC entering in your enclosure, so using an external wall adapter seem to be a good simpler and safer solution for noob. [https://www.digikey.com/products/en/power-supplies-external-internal-off-board/ac-dc-desktop-wall-adapters/130](https://www.digikey.com/products/en/power-supplies-external-internal-off-board/ac-dc-desktop-wall-adapters/130) 

Hi Sergey Sorry for late reply.  The requirement for buffering in DMX is a pain when compared with for example MIDI as it does require several isolated supplies.  One solution I have seen is the use of rechargeable batteries separated by HV diodes on both positive and negative.  The batteries are charged whilst the controller is not in use, and then removed for use whereupon each supply is isolated by the diodes reverse blocking characteristics.  Obviously the batteries need to be large enough for a show plus some spare, but unless you are lighting a Genesis concert that shouldn't be too onerous. Mike

"...but unless you are lighting a Genesis concert that shouldn't be too onerous." I'd guess we're both showing your ages here: You for saying it and me for falling about laughing over you saying it! :)

:-) It's not that Genesis were the peak in light shows, just that nowadays everyone uses huge LED display panels fed with video feeds so you need less channels for DMX style direct stage lighting, But since we're discussing age, I recall that in the 70s it was the sound that mattered and the lighting was just added on with a couple of follow spots and a few dozen pre-DMX, often Strand, channels at most.  Nowadays the visuals are everything and the sound is almost prehistoric (e.g. recent Spice Girl's concerts)