CAMBRIDGE ELECTRONICS LABORATORIES - …

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CAMBRIDGE ELECTRONICS LABORATORIES . Twenty Chester Street Somerville Massachusetts 02144-3005 USA. Telephone +1 617 629-2805 Telefax +1 617 623-1882. Dear Website Visitor, Thank you for coming to our website to obtain professional or hobbyist technical litera- ture. We hope you find our service useful and welcome any feedback you can offer to enhance the experience of future visitors like yourself. We take the opportunity of your visit to note (in case you arrived by direct link to the download file rather than from our home page as above) that we offer two families of unusual products. * The Black Magic Telephone Ringing Generator: a miniaturized, pcb-mounting switch-mode inverter generating power to ring a telephone bell from a source (5, 12, 24 or 48 V). Devices in this family are available with both sine- and square-wave outputs with a variety of power levels and package sizes to suit every application.

their resistance. The varying current produced, flowing through the primary of the induction coil, induces a current into the secondary, which is carried

  Laboratories, Current, Electronic, Cambridge, Cambridge electronics laboratories