hello guys..

im currently working on my final project. since im very newbie for electronic, i'd like to ask about this problem.

i need to convert an AC voltage (Sine wave) with maximum frequency 360KHz and -15v -- 15v voltage. is there any way to convert this AC voltage into 0-5 V dc output?


thank you for any help...

have a blessed day !

 

Are you trying to use the power or simply wanting to measure the amplitude?

If the latter, use a precision rectifier circuit.

 

You currently have this thread going. You started with a F/V converter and had several suggestions. What exactly are you trying to do?

Hello everyone.

im yoga from indonesia. im currently working on my final project. i need device that can convert frequency (up to 360 KHz) to voltage for my project. i tried LM 2907 but apparently it has maximum frequency around 2.5 Khz.

is there another way for me to convert the frequency i need? what IC or Circuit should i use?

thank you very much for any help...

You mentioned the minimum frequency is about 30KHz and maximum 360KHz. So it sounds like you want a F to V conversion. I suggested a chip from Analog Devices you never commented on? Do you expect different replies in this thread? You really need to be specific in what your goal is.

MrChips suggestion of using a Precision Rectifier Circuit is an excellent solution based on your initial post in this thread, however, it is not a frequency to voltage solution. Can you define exactly what your goal is? That is the only way you will get good help and suggestions.

Ron

 

You currently have this thread going. You started with a F/V converter and had several suggestions. What exactly are you trying to do?



You mentioned the minimum frequency is about 30KHz and maximum 360KHz. So it sounds like you want a F to V conversion. I suggested a chip from Analog Devices you never commented on? Do you expect different replies in this thread? You really need to be specific in what your goal is.

MrChips suggestion of using a Precision Rectifier Circuit is an excellent solution based on your initial post in this thread, however, it is not a frequency to voltage solution. Can you define exactly what your goal is? That is the only way you will get good help and suggestions.

Ron

hello ron

im trying two different ways to measure frequency and the amplitude sincei i found it difficult to convert frequency to voltage. so i try to use digital pin or arduino which is required to step down the ac voltage and rectify it. cmiiw

 

What is the range of amplitudes you need to measure? Is it a sine wave?
On the F to V converter. How accurate does it need to be? Since it sounds like you are looking with a mico, full scale = 5 volts?

 

One thread is enough. Lets keep it over there.

http://forum.allaboutcircuits.com/threads/frequency-to-voltage-converter.106207/#post-810396