Amplifier for frequency generator

[Goran]

Hi.

Im making one simple mcu based device that will work as electronic
repellent. Nothing special.

Only difference is that i want to check other frequency ranges and to do
so, i have to connect my device to function generator ( 0 - 4 MHZ ).

Does someone knows how to build amplifier for this function generator ?

 

[Phil Allison]

"Goran" <goran.net@gmail.com>

Im making one simple mcu based device that will work as electronic
repellent. Nothing special.

** ROTFL !!

There is only one "device" that can reliably rid your premises of mice, rats
and cockroaches - and that device is known as a cat.

Only difference is that i want to check other frequency ranges and to do
so, i have to connect my device to function generator ( 0 - 4 MHZ ).

** EMI regulations be hanged.

Does someone knows how to build amplifier for this function generator ?

** Classic.



.... Phi

 

[Goran]

On 06/26/2013 03:34 PM, Phil Allison wrote:

"Goran" <goran.net@gmail.com

Im making one simple mcu based device that will work as electronic
repellent. Nothing special.

** ROTFL !!

There is only one "device" that can reliably rid your premises of mice, rats
and cockroaches - and that device is known as a cat.


Only difference is that i want to check other frequency ranges and to do
so, i have to connect my device to function generator ( 0 - 4 MHZ ).

** EMI regulations be hanged.


Does someone knows how to build amplifier for this function generator ?


** Classic.



... Phi





------------------

Cat is good solution ( i have 2 ) but this project is more aimed on
insects

There are bunch of them on the mark but my project is more on the
research side and nothing of this will go commercial.

Freq is 0-4 M Hz. What's the voltage gain, and max output current?
- I was thinking of 3V.
- the device should work in 1-2 meter range so i will need relativly
small current.
- main frequency range will be from 1khz - 60 khz and 300 - 400 khz

 

[George Herold]

On Wednesday, June 26, 2013 9:13:35 AM UTC-4, Goran wrote:

Hi.
Im making one simple mcu based device that will work as electronic
repellent.
What's electronic repellent?

Doesn't sound like something we want on SEB. :^)

Nothing special.

Only difference is that i want to check other frequency ranges and to do

so, i have to connect my device to function generator ( 0 - 4 MHZ ).

Does someone knows how to build amplifier for this function generator ?

Well you need some spec's... Freq is 0-4 M Hz. What's the voltage gain, and max output current? There are an awful lot of opamp's out there.

George H.

 

[Jamie]

Goran wrote:

On 06/26/2013 03:34 PM, Phil Allison wrote:

"Goran" <goran.net@gmail.com

Im making one simple mcu based device that will work as electronic
repellent. Nothing special.


** ROTFL !!

There is only one "device" that can reliably rid your premises of
mice, rats
and cockroaches - and that device is known as a cat.


Only difference is that i want to check other frequency ranges and to do
so, i have to connect my device to function generator ( 0 - 4 MHZ ).


** EMI regulations be hanged.


Does someone knows how to build amplifier for this function generator ?



** Classic.



... Phi





------------------
Cat is good solution ( i have 2 ) but this project is more aimed on
insects

There are bunch of them on the mark but my project is more on the
research side and nothing of this will go commercial.

Freq is 0-4 M Hz. What's the voltage gain, and max output current?
- I was thinking of 3V.
- the device should work in 1-2 meter range so i will need relativly
small current.
- main frequency range will be from 1khz - 60 khz and 300 - 400 khz



But you'll be also hurting your pets ears..

Jamie

 

[Goran]

On 06/27/2013 02:03 AM, Jamie wrote:

Goran wrote:

On 06/26/2013 03:34 PM, Phil Allison wrote:

"Goran" <goran.net@gmail.com

Im making one simple mcu based device that will work as electronic
repellent. Nothing special.


** ROTFL !!

There is only one "device" that can reliably rid your premises of
mice, rats
and cockroaches - and that device is known as a cat.


Only difference is that i want to check other frequency ranges and
to do
so, i have to connect my device to function generator ( 0 - 4 MHZ ).


** EMI regulations be hanged.


Does someone knows how to build amplifier for this function generator ?



** Classic.



... Phi





------------------
Cat is good solution ( i have 2 ) but this project is more aimed on
insects

There are bunch of them on the mark but my project is more on the
research side and nothing of this will go commercial.

Freq is 0-4 M Hz. What's the voltage gain, and max output current?
- I was thinking of 3V.
- the device should work in 1-2 meter range so i will need relativly
small current.
- main frequency range will be from 1khz - 60 khz and 300 - 400 khz



But you'll be also hurting your pets ears..


Jamie

Like i wrote, it for testing purposes and no animal will be near this

Do you have some schematics or link on some amplifier ?

 

[George Herold]

On Wednesday, June 26, 2013 10:22:44 AM UTC-4, Goran wrote:

On 06/26/2013 03:34 PM, Phil Allison wrote:

"Goran" <goran.net@gmail.com



Im making one simple mcu based device that will work as electronic

repellent. Nothing special.



** ROTFL !!



There is only one "device" that can reliably rid your premises of mice, rats

and cockroaches - and that device is known as a cat.





Only difference is that i want to check other frequency ranges and to do

so, i have to connect my device to function generator ( 0 - 4 MHZ ).



** EMI regulations be hanged.





Does someone knows how to build amplifier for this function generator ?





** Classic.







... Phi











------------------

Cat is good solution ( i have 2 ) but this project is more aimed on

insects



There are bunch of them on the mark but my project is more on the

research side and nothing of this will go commercial.



Freq is 0-4 M Hz. What's the voltage gain, and max output current?

- I was thinking of 3V.

- the device should work in 1-2 meter range so i will need relativly

small current.

- main frequency range will be from 1khz - 60 khz and 300 - 400 khz

Sorry I'm still confused. Are you broad casting the frequencies into the air with an antenna? Or turning it into sound waves? If it's sound then what's the transducer? There are ultra sonic piezo transducers, but I don't think they couple to air very well. (big impedance mismatch.)

George H.

 

[George Herold]

On Thursday, June 27, 2013 3:29:35 AM UTC-4, Goran wrote:

On 06/27/2013 02:03 AM, Jamie wrote:

Goran wrote:



On 06/26/2013 03:34 PM, Phil Allison wrote:



"Goran" <goran.net@gmail.com



Im making one simple mcu based device that will work as electronic

repellent. Nothing special.





** ROTFL !!



There is only one "device" that can reliably rid your premises of

mice, rats

and cockroaches - and that device is known as a cat.





Only difference is that i want to check other frequency ranges and

to do

so, i have to connect my device to function generator ( 0 - 4 MHZ ).





** EMI regulations be hanged.





Does someone knows how to build amplifier for this function generator ?







** Classic.







... Phi











------------------

Cat is good solution ( i have 2 ) but this project is more aimed on

insects



There are bunch of them on the mark but my project is more on the

research side and nothing of this will go commercial.



Freq is 0-4 M Hz. What's the voltage gain, and max output current?

- I was thinking of 3V.

- the device should work in 1-2 meter range so i will need relativly

small current.

- main frequency range will be from 1khz - 60 khz and 300 - 400 khz







But you'll be also hurting your pets ears..





Jamie



Like i wrote, it for testing purposes and no animal will be near this



Do you have some schematics or link on some amplifier ?

http://www.digikey.com/product-search/en/integrated-circuits-ics/linear-amplifiers-instrumentation-op-amps-buffer-amps/2556125

Digikey has quite a few opamps (~33k)

George H.

 

[Frnak McKenney]

On Wed, 26 Jun 2013 20:03:42 -0400, Jamie <jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:

Goran wrote:
On 06/26/2013 03:34 PM, Phil Allison wrote:
"Goran" <goran.net@gmail.com

Im making one simple mcu based device that will work as electronic
repellent. Nothing special.

** ROTFL !!

There is only one "device" that can reliably rid your premises of
mice, rats
and cockroaches - and that device is known as a cat.

[...]

------------------
Cat is good solution ( i have 2 ) but this project is more aimed on
insects

There are bunch of them on the mark but my project is more on the
research side and nothing of this will go commercial.

Freq is 0-4 M Hz. What's the voltage gain, and max output current?
- I was thinking of 3V.
- the device should work in 1-2 meter range so i will need relativly
small current.
- main frequency range will be from 1khz - 60 khz and 300 - 400 khz

But you'll be also hurting your pets ears..

One word of warning: choose your cat carefully. My brother's cats are
good hunters -- they catch mice, chipmunks, and voles -- but then they
bring their prey inside, still alive, and release it to play with
later. ( Or not, if they get distracted. <grin!> )

Voles and chipmunks, even half-dead ones, are _fast_ little critters.


Frank McKenney
--
There is a wistful myth that if only we had enough money to spend--
the figure is usually put at a hundred billion dollars--we could
wipe out all slums in ten years, reverse decay in the great, dull,
gray belts that were yesterday's and day-before-yesterday's suburbs,
anchor the wandering middle class and its wandering tax money, and
perhaps even solve the traffic problem.

But look what we have built with the first several billions:
Low-income projects that become worse centers of delinquency,
candalism and general social hopelessness than the slums they were
supposed to replace. Middle-income housing projects which are truly
marvels of dullness and regimentation, sealed against any buoyancy
or vitality of city life. Luxury housing projects that mitigate
their inanity, or try to, with a vapid vulgarity. Cultural centers
that are unable to support a good bookstore. Civic centers that are
avoided by everyone but bums, who have fewer choices of loitering
places than others. Commercial centers that are lack-luster
imitations of standardized suburban chain-store shopping.
Promenades that go from no place to nowhere and have no promenaders.
Expressways that eviscerate great cities. This is not the
rebuilding of cities. This is the sacking of cities.

-- Jane Jacobs, "The Death and Life of Great American Cities"
--
Frank McKenney, McKenney Associates
Richmond, Virginia / (804) 320-4887
Munged E-mail: frank uscore mckenney aatt mindspring ddoott com

 

[Jamie]

Goran wrote:

On 06/27/2013 02:03 AM, Jamie wrote:

Goran wrote:

On 06/26/2013 03:34 PM, Phil Allison wrote:

"Goran" <goran.net@gmail.com

Im making one simple mcu based device that will work as electronic
repellent. Nothing special.



** ROTFL !!

There is only one "device" that can reliably rid your premises of
mice, rats
and cockroaches - and that device is known as a cat.


Only difference is that i want to check other frequency ranges and
to do
so, i have to connect my device to function generator ( 0 - 4 MHZ ).



** EMI regulations be hanged.


Does someone knows how to build amplifier for this function
generator ?




** Classic.



... Phi





------------------
Cat is good solution ( i have 2 ) but this project is more aimed on
insects

There are bunch of them on the mark but my project is more on the
research side and nothing of this will go commercial.

Freq is 0-4 M Hz. What's the voltage gain, and max output current?
- I was thinking of 3V.
- the device should work in 1-2 meter range so i will need relativly
small current.
- main frequency range will be from 1khz - 60 khz and 300 - 400 khz



But you'll be also hurting your pets ears..


Jamie

Like i wrote, it for testing purposes and no animal will be near this

Do you have some schematics or link on some amplifier ?

http://www.hep.upenn.edu/SNO/daq/parts/ad842.pdf

That only does a 100ma output but you can hang a totem pole
off it.

Jamie

 

[Jim Thompson]

On Thu, 27 Jun 2013 16:41:40 -0500, Frnak McKenney
<frnak@far.from.the.madding.crowd.com> wrote:

On Wed, 26 Jun 2013 20:03:42 -0400, Jamie <jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:
Goran wrote:
On 06/26/2013 03:34 PM, Phil Allison wrote:
"Goran" <goran.net@gmail.com

Im making one simple mcu based device that will work as electronic
repellent. Nothing special.

** ROTFL !!

There is only one "device" that can reliably rid your premises of
mice, rats
and cockroaches - and that device is known as a cat.

[...]

------------------
Cat is good solution ( i have 2 ) but this project is more aimed on
insects

There are bunch of them on the mark but my project is more on the
research side and nothing of this will go commercial.

Freq is 0-4 M Hz. What's the voltage gain, and max output current?
- I was thinking of 3V.
- the device should work in 1-2 meter range so i will need relativly
small current.
- main frequency range will be from 1khz - 60 khz and 300 - 400 khz

But you'll be also hurting your pets ears..

One word of warning: choose your cat carefully. My brother's cats are
good hunters -- they catch mice, chipmunks, and voles -- but then they
bring their prey inside, still alive, and release it to play with
later. ( Or not, if they get distracted. <grin!> )

Voles and chipmunks, even half-dead ones, are _fast_ little critters.


Frank McKenney
[snip]

Yep. One of my cats brought in a field mouse, played with it for some
time, then it got away and hid in our pantry. Fortunately these mice
are quite curious... everytime I'd open the pantry door, he peek out
from behind stuff on the shelves, then disappear.

So I hooked up the central vac... I'd open the pantry door... when I
saw him it was just poke the hose at him.... burble, burble, burble,
clunk, clunk, clunk thru the turns... dead at the bin >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Goran]

Sorry I'm still confused.
Are you broad casting the frequencies into the air with an antenna?

Or turning it into sound waves?

If it's sound then what's the transducer?
There are ultra sonic piezo transducers, but I don't think they couple
to air very well.
-----------------------------------
Hi George !

For 30 - 60 khz i will use ultrasonic piezo. But for other frequency
ranges i was planning to use antenna with gain control.

I have made one simple project with ultrasonic piezo and it worked quite
good. But this project has fixed frequency. Now i have to test few
different frequency ranges so this could be a problem.

 

[George Herold]

On Friday, June 28, 2013 2:19:55 AM UTC-4, Goran wrote:

Sorry I'm still confused.

Are you broad casting the frequencies into the air with an antenna?



Or turning it into sound waves?



If it's sound then what's the transducer?

There are ultra sonic piezo transducers, but I don't think they couple

to air very well.

-----------------------------------

Hi George !



For 30 - 60 khz i will use ultrasonic piezo. But for other frequency

ranges i was planning to use antenna with gain control.

I'd forget the antenna and E&M radiation. That's not going to do anything, unless you get enough power to 'cook' the critter.. and then the FCC might object..

I have made one simple project with ultrasonic piezo and it worked quite

good. But this project has fixed frequency. Now i have to test few

different frequency ranges so this could be a problem.
You might start by finding our what frequencies the various critters can hear.

I'd bet some biologists have already done this.

George H.

 

[Fred Abse]

On Thu, 27 Jun 2013 16:41:40 -0500, Frnak McKenney wrote:

Voles and chipmunks, even half-dead ones, are _fast_ little critters.

Chipmunk fleas can jump ten feet

Around Subway Cave, adjacent Lassen Volcanic National Park, in Northern
CA, there are official notices regarding chipmunk fleas carrying bubonic
plague.

--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)

 

[asdf]

On Wed, 26 Jun 2013 16:22:44 +0200, Goran wrote:

Cat is good solution ( i have 2 ) but this project is more aimed on
insects

Get an improved cat then:^)
One of my cats kills every darn critter entering the house, no matter how
small it is.
Sometimes I see him fighting like against invisible ninjas, only to find
seconds later a small dead mosquito/fly/spider whatever nearby.

Freq is 0-4 M Hz. What's the voltage gain, and max output current? - I
was thinking of 3V.
- the device should work in 1-2 meter range so i will need relativly
small current.
- main frequency range will be from 1khz - 60 khz and 300 - 400 khz

Won't work. Either it's too weak to work as a repellent for insects
or it is going to be very annoying if not harmful pets/humans too.