Forums

Amplifier for frequency generator

Started by Goran June 26, 2013
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 ?


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.
"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
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
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
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 ?
On Wednesday, June 26, 2013 10:22:44 AM UTC-4, Goran wrote:
> On 06/26/2013 03:34 PM, Phil Allison wrote: >=20 > > "Goran" <goran.net@gmail.com> >=20 > > >=20 > >> Im making one simple mcu based device that will work as electronic >=20 > >> repellent. Nothing special. >=20 > > >=20 > > ** ROTFL !! >=20 > > >=20 > > There is only one "device" that can reliably rid your premises of mice,=
rats
>=20 > > and cockroaches - and that device is known as a cat. >=20 > > >=20 > > >=20 > >> Only difference is that i want to check other frequency ranges and to =
do
>=20 > >> so, i have to connect my device to function generator ( 0 - 4 MHZ ). >=20 > > >=20 > > ** EMI regulations be hanged. >=20 > > >=20 > > >=20 > >> Does someone knows how to build amplifier for this function generator =
?
>=20 > > >=20 > > >=20 > > ** Classic. >=20 > > >=20 > > >=20 > > >=20 > > ... Phi >=20 > > >=20 > > >=20 > > >=20 > > >=20 > > >=20 > ------------------ >=20 > Cat is good solution ( i have 2 ) but this project is more aimed on=20 >=20 > insects :-) >=20 >=20 >=20 > There are bunch of them on the mark but my project is more on the=20 >=20 > research side and nothing of this will go commercial. >=20 >=20 >=20 > Freq is 0-4 M Hz. What's the voltage gain, and max output current? >=20 > - I was thinking of 3V. >=20 > - the device should work in 1-2 meter range so i will need relativly=20 >=20 > small current. >=20 > - 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 a= ir with an antenna? Or turning it into sound waves? If it's sound then wh= at'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.
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.
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
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