On 1/17/2016 8:46 AM, Ed Pawlowski wrote:
On 1/17/2016 9:37 AM, bob_villain wrote:

So, a diode in the bell unit in a traditionally wired circuit
can only *discard* half of the electricity presented to it.
If the (non-diode) button is "open" (not pressed), then there
is no electricity to discard; no electricity to operate!

Does she really need a back-story on ding-dongs...even if it *is* coming from
an "expert ding-dong"? WTF man!

She said:
"Can someone please educate me. From what I am finding out, all wired
doorbells must have a diode or else the doorbell won't chime."
Perhaps Bob Bozo Twit can "educate her" less verbosely? Education requires
explanation. Clearly, the PAID, PROFESSIONAL electrician did not provide
an "education" -- might not even understand *why* the diode is there!

[Hint: *design* an electronic doorbell and you may learn a few practical
things!]

While she may not appreciate the details, I've offered a logical reason
that explains why a bulb can fail without a diode or when a diode fails
(leading to the bulb later "seeing" the full potential of the XFMR).

No, she does not. I, however, found it to be an excellent explanation of why
it is needed. I learned something today.

Goal is to learn something EVERY day! "Settling" for someone else's
conclusions leaves you eating *a* fish but never knowing how to catch
the next one!

Thank you Don, for taking the time.