Speaker id needed

A

AK

Guest
This is from a cordless phone.

I think it is a speaker.

Phone uses 2.4 volt battery.

I was wondering if it would work in a 9 Vdc circuit?

https://www.dropbox.com/s/yy6rwm0vib91010/PhoneSpeaker.jpg?dl=0
 
On Saturday, May 25, 2019 at 11:20:51 AM UTC-5, AK wrote:
This is from a cordless phone.

I think it is a speaker.

Phone uses 2.4 volt battery.

I was wondering if it would work in a 9 Vdc circuit?

https://www.dropbox.com/s/yy6rwm0vib91010/PhoneSpeaker.jpg?dl=0
Click to expand...

I think this is really the speaker. On the board it was marked bz.

https://www.dropbox.com/s/5vyy20td43m80pj/Buzzer.png?dl=0

Applying 3 volts made a low volume sound.

Andy
 
On 2019-05-25, AK <scientist77017@gmail.com> wrote:
This is from a cordless phone.

I think it is a speaker.

Phone uses 2.4 volt battery.

I was wondering if it would work in a 9 Vdc circuit?

https://www.dropbox.com/s/yy6rwm0vib91010/PhoneSpeaker.jpg?dl=0
Click to expand...

150 ohms 30mW

9V would overload it by about 10 times


view this diagram in fixed pitch


speaker

\ / 100uF
9Vp-p -----[ ]--[100R]--||--.
|
---


but with 100 ohms and a 100uF capacitor in series it should
be able to handle a 9v peak-to-peak signal (like from a LM555 or LM386)

--
When I tried casting out nines I made a hash of it.
 
On Sat, 25 May 2019 09:20:47 -0700, AK wrote:

This is from a cordless phone.

I think it is a speaker.

Phone uses 2.4 volt battery.

I was wondering if it would work in a 9 Vdc circuit?

https://www.dropbox.com/s/yy6rwm0vib91010/PhoneSpeaker.jpg?dl=0
Click to expand...

I think you'd really benefit enormously from reading this book alongside
your construction efforts. It's about THE best book for those new to
electronics and despite the dumb-sounding title it does actually venture
into the slightly more advanced topics of resonance, reactance,
impedance, phase-shift/trig etc. You can probably pick up a good used
copy from Ebay for 5-10 bucks.

http://www.arrl.org/shop/Understanding-Basic-Electronics/
 
On Sun, 26 May 2019 09:29:48 +0000, Cursitor Doom wrote:

For the avoidance of doubt, I'm referring to *this* book:

https://tinyurl.com/y3grgywa

and not any other with the same or similar name.
 
On Sunday, May 26, 2019 at 4:29:51 AM UTC-5, Cursitor Doom wrote:
On Sat, 25 May 2019 09:20:47 -0700, AK wrote:

This is from a cordless phone.

I think it is a speaker.

Phone uses 2.4 volt battery.

I was wondering if it would work in a 9 Vdc circuit?

https://www.dropbox.com/s/yy6rwm0vib91010/PhoneSpeaker.jpg?dl=0

I think you'd really benefit enormously from reading this book alongside
your construction efforts. It's about THE best book for those new to
electronics and despite the dumb-sounding title it does actually venture
into the slightly more advanced topics of resonance, reactance,
impedance, phase-shift/trig etc. You can probably pick up a good used
copy from Ebay for 5-10 bucks.

http://www.arrl.org/shop/Understanding-Basic-Electronics/
Click to expand...

I am currently reading Practical Electronics for Inventors.

Cheapest used copy I found for Understanding Basic Electronics was $21.

I could get it in a couple of weeks.

Andy
 
On Sunday, May 26, 2019 at 4:36:12 AM UTC-5, Cursitor Doom wrote:
On Sun, 26 May 2019 09:29:48 +0000, Cursitor Doom wrote:

For the avoidance of doubt, I'm referring to *this* book:

https://tinyurl.com/y3grgywa

and not any other with the same or similar name.
Click to expand...

Sorry, I did not see this post before I posted.

Andy
 
On 5/27/2019 10:45 AM, AK wrote:
....
Cheapest used copy I found for Understanding Basic Electronics was $21.

I could get it in a couple of weeks.

Andy
Click to expand...

This link by C-Doom is $4:
https://tinyurl.com/y3grgywa
 
On Monday, May 27, 2019 at 7:45:36 AM UTC-7, AK wrote:
> I am currently reading Practical Electronics for Inventors.
You might want to look at
https://www.americanradiohistory.com/
especially the listed ones under "Consumer Electronics" and "Hobbyist Publications".

I got started on Popular Electronics and Electronics Illustrated. They are probably dated, but the Don Lancaster Cookbooks were very popular.
 
On Mon, 27 May 2019 10:57:02 -0400, Bob Engelhardt
<BobEngelhardt@comcast.net> wrote:

On 5/27/2019 10:45 AM, AK wrote:
...
Cheapest used copy I found for Understanding Basic Electronics was $21.

I could get it in a couple of weeks.

Andy


This link by C-Doom is $4:
https://tinyurl.com/y3grgywa
Click to expand...

Abebooks.com has it for $3.88 with free shipping.

https://tinyurl.com/y2gpnpom
 
On Monday, May 27, 2019 at 9:57:26 AM UTC-5, Bob Engelhardt wrote:
On 5/27/2019 10:45 AM, AK wrote:
...
Cheapest used copy I found for Understanding Basic Electronics was $21.

I could get it in a couple of weeks.

Andy


This link by C-Doom is $4:
https://tinyurl.com/y3grgywa
Click to expand...

Thanks. I just ordered it.

Andy
 
On Mon, 27 May 2019 13:01:07 -0700 (PDT), AK
<scientist77017@gmail.com> wrote:

On Monday, May 27, 2019 at 9:57:26 AM UTC-5, Bob Engelhardt wrote:
On 5/27/2019 10:45 AM, AK wrote:
...
Cheapest used copy I found for Understanding Basic Electronics was $21.

I could get it in a couple of weeks.

Andy


This link by C-Doom is $4:
https://tinyurl.com/y3grgywa

Thanks. I just ordered it.

Andy
Getting started in Electronics [Forrest M. Mims] [PDF]
Click to expand...

Available on bit torrent:

magnet:?xt=urn:btih:cd5f709cb5e0331af38e4460f07b5b850f368005&dn=Getting+started+in+Electronics+%5BForrest+M.+Mims%5D+%5BPDF%5D&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969&tr=udp%3A%2F%2Ftracker.openbittorrent.com%3A80&tr=udp%3A%2F%2Fopen.demonii.com%3A1337&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969&tr=udp%3A%2F%2Fexodus.desync.com%3A6969

Only 128 pages, very basic and entertaining to some extent. His
series of books are in the same spirit (basic and interesting)
 
On Mon, 27 May 2019 13:01:07 -0700, AK wrote:

> Thanks. I just ordered it.

Wish I'd had it myself 60 years ago, but there was nothing of that sort
around back then; not in the UK anyway. I had this crazy notion (though
it *seemed* perfectly self-evident to me as a beginner) that given a
chain of resistors in series between two poles of a battery, that the
current through each resistor as you go down the change would diminish.
After all, it *must* do, I reasoned, otherwise the resistors wouldn't get
warm and run the battery down. That sounds daft to me now, but back then,
if someone had told me the current was the same through every resistor I
wouldn't have believed them!

The book I suggested prevents readers from making elementary errors like
that by clearly setting out the cornerstones, the rock-solid foundations
of the science that you NEED to build on in order to learn more.




--
This message may be freely reproduced without limit or charge only via
the Usenet protocol. Reproduction in whole or part through other
protocols, whether for profit or not, is conditional upon a charge of
GBP10.00 per reproduction. Publication in this manner via non-Usenet
protocols constitutes acceptance of this condition.
 
On Wednesday, May 29, 2019 at 7:19:26 AM UTC-5, default wrote:
On Mon, 27 May 2019 13:01:07 -0700 (PDT), AK
scientist77017@gmail.com> wrote:

On Monday, May 27, 2019 at 9:57:26 AM UTC-5, Bob Engelhardt wrote:
On 5/27/2019 10:45 AM, AK wrote:
...
Cheapest used copy I found for Understanding Basic Electronics was $21.

I could get it in a couple of weeks.

Andy


This link by C-Doom is $4:
https://tinyurl.com/y3grgywa

Thanks. I just ordered it.

Andy
Getting started in Electronics [Forrest M. Mims] [PDF]

Available on bit torrent:

magnet:?xt=urn:btih:cd5f709cb5e0331af38e4460f07b5b850f368005&dn=Getting+started+in+Electronics+%5BForrest+M.+Mims%5D+%5BPDF%5D&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969&tr=udp%3A%2F%2Ftracker.openbittorrent.com%3A80&tr=udp%3A%2F%2Fopen.demonii.com%3A1337&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969&tr=udp%3A%2F%2Fexodus.desync.com%3A6969

Only 128 pages, very basic and entertaining to some extent. His
series of books are in the same spirit (basic and interesting)
Click to expand...

Thanks. Mr. Mims printing is excellent.

Andy
 
On Wed, 29 May 2019 19:32:41 -0700 (PDT), AK
<scientist77017@gmail.com> wrote:

On Wednesday, May 29, 2019 at 7:19:26 AM UTC-5, default wrote:
On Mon, 27 May 2019 13:01:07 -0700 (PDT), AK
scientist77017@gmail.com> wrote:

On Monday, May 27, 2019 at 9:57:26 AM UTC-5, Bob Engelhardt wrote:
On 5/27/2019 10:45 AM, AK wrote:
...
Cheapest used copy I found for Understanding Basic Electronics was $21.

I could get it in a couple of weeks.

Andy


This link by C-Doom is $4:
https://tinyurl.com/y3grgywa

Thanks. I just ordered it.

Andy
Getting started in Electronics [Forrest M. Mims] [PDF]

Available on bit torrent:

magnet:?xt=urn:btih:cd5f709cb5e0331af38e4460f07b5b850f368005&dn=Getting+started+in+Electronics+%5BForrest+M.+Mims%5D+%5BPDF%5D&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969&tr=udp%3A%2F%2Ftracker.openbittorrent.com%3A80&tr=udp%3A%2F%2Fopen.demonii.com%3A1337&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969&tr=udp%3A%2F%2Fexodus.desync.com%3A6969

Only 128 pages, very basic and entertaining to some extent. His
series of books are in the same spirit (basic and interesting)

Thanks. Mr. Mims printing is excellent.

Andy
Click to expand...

I like his learning while doing approach and schematics with values
already calculated.

There's a complete collection on bit torrent, and the one on
opto-electronics would be beneficial to your efforts. He recommends a
light baffle (tube to eliminate ambient light) at 5X longer than the
diameter.
 
I used a pvc pipe about 3 inches long. It eliminated ambient light problems.
 
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