Dear community,

I am trying to get information or a electrical design I can use for my circuit which will later function as a RF pulse modulation circuit. In order to do this I need to fluctuate the voltage up and down going though the signal generator module which runs on 12-16v DC. I also have a current regulator module which I will probably include before the signal generator circuit.

So to summerise I am looking into how to fluctuate DC in a timely manner, ideally controllable flucuations. What I mean by flucturate is by inceasing the power then lowering it again on a loop that I can control the speed of, thus the Hz (cycles per second) of the signal later (which is how pulse modulation works). I need something like a light dimmer circuit which can be done without use interaction?

Thank you for reading.

Richy

 

Not enough info.

Do you have a specific design for the signal generator module?

What generates the modulation signal?

How fast is the modulation signal?

 

Not enough info.

Do you have a specific design for the signal generator module?

What generates the modulation signal?

How fast is the modulation signal?

I do not have a specific design but intend to use the following:

https://www.banggood.com/Geekcreit-...izer-ADF4351-Development-Board-p-1416998.html

this is the voltage/current regulator I am using also:

https://www.banggood.com/LM2596-DC-...wer-Supply-Module-With-Display-p-1005123.html

which by the way is a great product.

I have attached a diagram what what I am attempting. Instead of using AC (which I do not think will work) I need something to do similar.

 

Apart from the fact that what you plan to do is illegal in most countries without the appropriate certification and licences - why do you want to do this?

You say you want to vary the output power cyclically; that can be done with that board with custom software if you have the necessary programming knowledge/skills. Changing the supply voltage will not have the effect you intend.

The power supply module needs a stable DC input.

 

You say you want to vary the output power cyclically; that can be done with that board with custom software if you have the necessary programming knowledge/skills. Changing the supply voltage will not have the effect you intend.

The power supply module needs a stable DC input.

Thank you for the advice regarding the module. Do you have any advice regarding my question still, to achieve what I am trying to do? What sort of modules are you intending to use?

 

Thank you for the advice regarding the module. Do you have any advice regarding my question still, to achieve what I am trying to do? What sort of modules are you intending for me to use? do you have a link?

 

Thank you for the advice regarding the module. Do you have any advice regarding my question still, to achieve what I am trying to do? What sort of modules are you intending to use?

I have nothing for you. I've never heard of a good reason for doing this. Where did you come up with this "off the wall" notion?

 

I have nothing for you. I've never heard of a good reason for doing this. Where did you come up with this "off the wall" notion?

I am experimenting with different circuits as a hobby to learn. I have a found interest in electronics.

 

Thank you for the advice regarding the module. Do you have any advice regarding my question still, to achieve what I am trying to do? What sort of modules are you intending to use?

My only advice to you is to be clearer about what you are trying to achieve and why... I'm not intending to use anything, this is your project...

I am experimenting with different circuits as a hobby to learn. I have a found interest in electronics.

I'm not sure what you will learn from this...

 

My only advice to you is to be clearer about what you are trying to achieve and why... I'm not intending to use anything, this is your project...


I'm not sure what you will learn from this...

I am trying to achieve, what in physics and radio technology is called pulse modulation.. I want to see if I can achieve and test it out. but in order to do that I need to fluctuate the amplitude and you do that by fluctuating the power.

 

I am trying to achieve, what in physics and radio technology is called pulse modulation.. I want to see if I can achieve and test it out. but in order to do that I need to fluctuate the amplitude and you do that by fluctuating the power.

Wrong!

 

I am trying to achieve, what in physics and radio technology is called pulse modulation.. I want to see if I can achieve and test it out. but in order to do that I need to fluctuate the amplitude and you do that by fluctuating the power.

Not with this board you don't. That's not how it works. Pulse modulation covers a number of different schemes from simple on/off to Pulse Width modulation which conveys information in the width of the pulse. In all cases the modulation involves switching the output stage on and off through some form of electronic switch - not by powering the whole module on and off as that shuts down the frequency generation components eg the oscillator. Now this board has output power control in software so it could be implemented in software controlled by an external input but that assumes you have the knowledge and skill to do so.

To be honest, it sounds like you're trying to do stuff way beyond your current level of understanding...