Re: [EVGRAY] Simple buzzer circuit

Body

Here is the explanation: https://groups.yahoo.com/neo/groups/EVGRAY/conversations/messages/106408 https://groups.yahoo.com/neo/groups/EVGRAY/conversations/messages/106408

Door bell or buzzer if omitting the hammer and bell:

Source of animation: https://wiki2.org/en/Electric_bell https://wiki2.org/en/Electric_bell

Norman's figure if it makes it:

The return path of the magnetic flux has to pass through air outside of the core. This gives a very high reluctance or magnetic resistance which is reactive and thus doesn't dissipate its energy. The magnetic field is just weakened compared to a path through a good magnetic conductor like iron.

Regards
Ole
 

---In [email protected], <nwootan@...> wrote :

 Please take note?? regarding the simple circuit depicted.?? When you float this circuit, with no ground reference and have the make /break contact opening, you will get the EMI radiation due to the antiparrallel magnetic flux being converted into photon energy in the contact arcing.?? We call it radio hash and you can hear it with the old analog AM radios.?? 

 On 9/26/2019 9:57 AM, Norman Wootan nwootan@... mailto:nwootan@... [EVGRAY] wrote:

 ?? 
 
 
 
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 At contact opening an input voltage of 12VDC will multiply to over 1,000 V due to Oles explanation of conservation of energy.