Timex Indiglo - what voltage is required to illuminate the electroluminescence dial?

[richardmills]

As per the topic really, what voltage is required to illuminate the electroluminescence dial? I'd like to test a spare dial that I have.

 

[jdm]

48 minutes ago, richardmills said:

As per the topic really, what voltage is required to illuminate the electroluminescence dial? I'd like to test a spare dial that I have.

That could be battery voltage, but I have no specific knowledge . These watches have been sold in large numbers yet they are not the focus of most collectors or repairers. Perhaps you could measure on a working piece. 

[watchweasol]

The voltage required to drive the electro luminescence  is between 100 qnd 200 vac. the 1.5 volt battery voltage is fed through a  1:100 transformer to acheive approx 150vac.  this is used to drive the dial.

[jdm]

6 minutes ago, watchweasol said:

The voltage required to drive the electro luminescence  is between 100 qnd 200 vac. the 1.5 volt battery voltage is fed through a  1:100 transformer to acheive approx 150vac.  this is used to drive the dial.

Battery is 3V is case of these Timex. So there has to be a miniature inverter in there, interesting.