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Switches and AC outlet power supply for EL wire
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Switches and AC outlet power supply for EL wire

by Brian_Clemons on Wed Mar 21, 2018 6:28 pm

We are constructing museum displays that we want to use EL wire for. Several different arrow shapes will be placed under a plexiglass map, and we need to control them with push buttons (arcade game buttons- SPDT, .187" Quick connect terminal, 10A- 125/250V AC).

30-784.jpg
30-784.jpg (12.69 KiB) Viewed 295 times


My question is about how to best power these, and where does the switch need to go, on the high voltage side, or at the power supply?
Can I get an adapter to plug into a wall outlet?
Do I need a separate inverter or transformer for each arrow?

Any help would be appreciated.
Thanks!

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Re: Switches and AC outlet power supply for EL wire

by normlane on Wed Apr 04, 2018 8:34 pm

I have exactly the same question. Disappointing to not see a reply yet.

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Re: Switches and AC outlet power supply for EL wire

by Spaceboy64 on Wed Apr 04, 2018 11:04 pm

normlane wrote:I have exactly the same question. Disappointing to not see a reply yet.


Yep, I thought this might be a reply. This is something I really need to know!

Here is a concept drawing of what we're doing.
Monarch-Display-CU.jpg
Monarch-Display-CU.jpg (283.14 KiB) Viewed 260 times

The arrows would actually be made out of the EL wire, one for each button.

Any help would be appreciated.
Thanks!

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Re: Switches and AC outlet power supply for EL wire

by adafruit2 on Sat Apr 14, 2018 1:01 pm

You shouldnt switch EL directly with a mechanical switch, the voltage is too high, it will eventually oxidize and ruin the switch. instead, use an optoisolated EL controller and then read the switches from a microcontroller like an arduino:
https://www.seeedstudio.com/EL-Shield-p-1287.html

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Re: Switches and AC outlet power supply for EL wire

by jps2000 on Sun Apr 15, 2018 5:13 am

sounds difficult so I have mercy...

More easy is to use one inverter per elwire like this: https://www.adafruit.com/product/448
Then connect your switches in series with the red wires of the inverters.
Supply all 4 inverters with a 12V 1A mains adapter.
( I suppose 1A is sufficient for all 4 hence documentation is VERY POOR in that respect!!!)
To make it clear:
connect all black wires of the inverters to negative 12 V supply
every red wire goes via the individual switch to positive 12V supply

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Re: Switches and AC outlet power supply for EL wire

by adafruit2 on Sun Apr 15, 2018 11:44 am

you could do that, but as you imagine, it gets expensive. we also aren't sure how fast you can switch the inverters, it may cause early failure if you try to switch them fast (more than once per minute)

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Re: Switches and AC outlet power supply for EL wire

by jps2000 on Mon Apr 16, 2018 1:13 am

Hmm
5$ per inverter is expensive?
Your reliability concerns you may be right. However, if adafruit is committed to deliver quality products (which I expected according to perceived superior customer support) you may address those reliability matters to your Q people.

By the way:
Your proposal suggests running the inverter without load. I would be also concerned about reliability issues caused by that not foreseen operation mode

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