Good Day All.

I was wondering if anyone might be able to help me with making a 42 kHz 30v Oscillator Circuit.

I need a pulsed output voltage of 30volts @ 42 kHz with a 50% dutycycle.

What would be the best way about doing this?

Thanks for your time.

Best Regards.

 

And what current do you need?

 

A good question. Another question, what kind of stability do you need? A 555 may be able to do the basic oscillator if you're not too picky, and then add a transistor driver afterwards.

 

Current is nothing big, around 500ma (15-20 Watts).

I would like the freq as close as possible to 42 kHz a +/- 5%, Idealy less then 2%.

 

What is your waveform specification, is it 0 to 30 volt, or +/- 15 volt. Please be more specific then you are asking question. If you had given us the full spec in your first question. You would probably have got your solution by now

 

lmc555

this is cmos version of 555 , this can only work up to 15 volts and can only ouput 20ma , you need a transistor and higher voltage supply obviously .

http://www.electro-tech-online.com/...quare-wave-pulses-have-50-duty-cycle-50pc.gif

your welcone

 

Actually, he did specify a P-P voltage, 30V. I interpret pulsed as square, though there are other shapes, but 50% duty cycle cinches it IMO. Since transistor drivers (or MOSFETs) are a given, and neither the 555 nor CMOS 555 can reach the power supply, the type of 555 is moot IMO, though the CMOS 555 Hysteretic Oscillator will be a true 50%.

This is how I would do it. A regular 555 will work in this design, but it won't be 50%. A CMOS 555 will. Adjust the resistor for your frequency. There are no protections for the output drive, you overload the transistors they will burn out.

 

Thanks for your replys.

I will grab the needed parts over the next few days.

I will report back once tested.

Thanks again.