Re: [AFMUG] OT: Electronic question

Bill Prince Tue, 06 Sep 2022 20:24:49 -0700

When you're up to your ass in alligators, it's important to remember your
original goal was to drain the swamp.


OTOH, I've had a lot of fun doing all sorts of goofball things with a
raspberry pi.


--
bp
part15sbs{at}gmail{dot}com


On Tue, Sep 6, 2022 at 8:06 PM Forrest Christian (List Account) <
[email protected]> wrote:

> On a slightly similar note..
>
> I'm considering using a raspberry pi or similar to do variable paging
> messages for various "visitor" events at the manufacturing facility.   For
> instance someone coming up the drive or pushing a doorbell.
>
> Just never got beyond the doorbell and it's a lot of effort to go through
> when a stock door chime works.
>
> On Tue, Sep 6, 2022, 3:26 PM Chuck McCown <[email protected]> wrote:
>
>> IOT, will need a web interface and must have SNMP management too.
>> May as well put a screen and browser on it too.
>>
>> *From:* Forrest Christian (List Account)
>> *Sent:* Tuesday, September 6, 2022 2:40 PM
>> *To:* AnimalFarm Microwave Users Group
>> *Cc:* Chuck McCown
>> *Subject:* Re: [AFMUG] OT: Electronic question
>>
>> Hook the whole thing up to a PLC.  Lots of control then.    😉
>>
>> On Tue, Sep 6, 2022, 10:18 AM Chuck McCown via AF <[email protected]>
>> wrote:
>>
>>> Resistor in parallel will draw more current and perhaps allow the
>>> solenoid
>>> to work.  Those solenoid door bells normally use up almost all of the
>>> power
>>> from those class 2 transformers.
>>>
>>> -----Original Message-----
>>> From: [email protected]
>>> Sent: Tuesday, September 6, 2022 9:57 AM
>>> To: 'AnimalFarm Microwave Users Group'
>>> Subject: Re: [AFMUG] OT: Electronic question
>>>
>>> I'm thinking V=IR so if I add resistance to the newer bell would it draw
>>> more current and trigger the solenoid?  Or would the resistor just be
>>> turning current into heat?
>>>
>>>
>>> -----Original Message-----
>>> From: AF <[email protected]> On Behalf Of Chris Fabien
>>> Sent: Tuesday, September 06, 2022 11:41 AM
>>> To: AnimalFarm Microwave Users Group <[email protected]>
>>> Subject: Re: [AFMUG] OT: Electronic question
>>>
>>> I think you are correct about the cause of the issue, probably the
>>> easiest
>>> solution is to leave the buzzer in the main circuit, and wire a 24vac
>>> relay
>>> in parallel with it, using the relay contacts to close and open the
>>> circuit
>>> to the ding-dong bell.
>>>
>>> On Tue, Sep 6, 2022 at 10:08 AM <[email protected]> wrote:
>>> >
>>> > I know some of you are really good at this stuff…..
>>> >
>>> >
>>> >
>>> > I’m in a 95 year old house.  There are two doorbells.  I just replaced
>>> the
>>> > front doorbell with a new cheapo from Lowes.  Two chimes and two
>>> > solenoids.  One solenoid fires when you press the button, and the
>>> other
>>> > fires when you release the button so you get the “ding-dong”.
>>> >
>>> >
>>> >
>>> > There’s an old doorbell in the back kitchen that sounds like an old
>>> school
>>> > bell.  Two coils make the clacker move rapidly back and forth striking
>>> the
>>> > bell repeatedly.
>>> >
>>> >
>>> >
>>> > Well, when I hooked up both the old and new bell at the same time, the
>>> > school bell goes off when you press the button and the new one just
>>> goes
>>> > “dong” when you release the button.  Either one works fine hooked up
>>> > separately.  I’m guessing the first solenoid never fires on the new
>>> > doorbell because the school bell is a way heavier load and takes all
>>> the
>>> > current.  I could just replace the school bell, but I kinda like the
>>> > nostalgic factor.  And I suppose the other easy answer is put them on
>>> > separate transformers triggered by the same switch.
>>> >
>>> >
>>> >
>>> > Is there some simple nerd-gineer answer like “just put a resistor
>>> here”?
>>> >
>>> >
>>> >
>>> >
>>> >
>>> > --
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>>> > [email protected]
>>> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
>>>
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Re: [AFMUG] OT: Electronic question

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