24volt ac naar 12volt dc

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Ringing an Old Telephone

Hi, I'm trying to control the ringer in an old telephone (see attachment below). I thought these would be hooked up to electromagnets, in the same way as old school bells, but I think the circuit is a little more complicated. There is one black wire coming out of the left electromagnet, and one red wire coming out of the right electromagnet. Not sure if all the parts are working, but I wouldn't mind replacing them with some new ones if I knew how to drive those electromagnets to ring the bells. …