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Amplifier for frequency generator

G

Goran

Jan 1, 1970
0
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 ?
 
G

George Herold

Jan 1, 1970
0
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.
 
P

Phil Allison

Jan 1, 1970
0
Goran said:
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
 
G

Goran

Jan 1, 1970
0
** 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.



** EMI regulations be hanged.




** 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
 
J

Jamie

Jan 1, 1970
0
Goran said:
------------------
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
 
G

Goran

Jan 1, 1970
0
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 ?
 
G

George Herold

Jan 1, 1970
0
------------------

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.
 
G

Goran

Jan 1, 1970
0
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.
 
G

George Herold

Jan 1, 1970
0
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.
 
F

Fred Abse

Jan 1, 1970
0
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.
 
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