Every house I've ever poked around in has (an often non-working) AC bell/transformer stashed somewhere. Mike's clearly gotten around ... :) Jack On 3/18/08, Michael Rigby-Jones wrote: > > > > -----Original Message----- > > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On > Behalf > > Of Apptech > > Sent: 18 March 2008 12:18 > > To: PIC List > > Subject: [EE]:: Bell transformer usage USA > > > > I understand that bell transformers are common in the US. > > They exist here but are a relative rarity. I understand that > > they typically provide 10-20 volt output. > > > > My question is, how commonly is the output distributed or > > available only as the raw AC from the transformer and how > > common is it for it to be rectified and made available as > > DC? Obviously it is trivially easy to add a diode or a > > bridge rectifier to the AC, but what I want to know is what > > is actually typically done in practice. Gargoyle adumbrates > > that AC is the norm, but this may not be so. > > > All the bell transformers I have seen are typically used for the > solenoid driven "Ding dong" type doorbell, and have an AC output. If you > keep you finger on the button you can hear the solenoid hum (as it > starts gently smoking). > > Mike > > ======================================================================= > This e-mail is intended for the person it is addressed to only. The > information contained in it may be confidential and/or protected by > law. If you are not the intended recipient of this message, you must > not make any use of this information, or copy or show it to any > person. Please contact us immediately to tell us that you have > received this e-mail, and return the original to us. Any use, > forwarding, printing or copying of this message is strictly prohibited. > No part of this message can be considered a request for goods or > services. > ======================================================================= > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist