Actually Timescope i cant remember the frequency... i think it was between 1k and 5k but I really cant remember...Im limited with the LM358 dual Op Amp if that will help with those values, its all I have on hand.Hi waveguy,
I will assume that the waveform you posted is 1.286 kHz and work out the component values.
@shortbus, thanks. I also wish that I had your knowledge. That's why we are here in this great forum.
Timescope
We can forget about actually needing it into an AC form... but it will need a variable high current stage... if using a transformer it will need to be rectified :/@Timescope, I'm a complete dummie at this stuff.
Since Waveguy needs this to be AC, can your circuit be made to do the negative side too?
Yes Sir buddy, I aint in no hurry... hectic days seem to fly by like a monday a power on and signal out indicator led's should be all we need.. I wish i knew if we'll need to regulate any voltage for those or an opto, ( h11d1 )for higher output stage... Im just very greatfull to have you on board mr. !!! Ive discovered guessing resistor values is not a very good idea lol .Hi waveguy, I'm back after a hectic day.
I want to use a 9v to 12v supply for the circuit if that will be ok.
Timescope
This is ok. I will see what I can put together.The power supply I'm using is a 12v 1300 miliamp universal power supply
You are not alone. None of us knows how the OP intends to use the waveform he requested. I have a feeling that it's something like the horizontal output stage of a CRT tv. Just a guess.@Timescope, I'm a complete dummie at this stuff.
Since Waveguy needs this to be AC, can your circuit be made to do the negative side too?
Hi Waveguy, I have finished the calculations and will upload later when the internet line is better. I have some interesting results.
Timescope
.I have a big problem now... my 555 gets burning hot soon as i take source of any transistor or FET to ground
For some reason my circuit isnt working now,the 555 is getting hot when connecting any transistor or FET source to ground.
It is possible to derive any waveform if we know what you want.
1. Post a drawing of the waveform that you want showing the amplitude and frequency.
The scope waveform lacks the required information as you have not stated the volts/division and time/division settings. I have assumed that the frequency is 1.286 kHz and the vertical scale is 2v/division and calculated the voltages and slopes of the waveform :The waveform I need is on page 1
Hey Timescope, if the results you were getting with the above calulations gave the waveform we're after, those values will be fine.If I can get the op amps to output the deisired waveform with a 10v peak amplitude to drive the gate of a FET is all I need.Tweaking of the frequency values and space ratio may be required later anyways.Im thinking the Space ratio of the waveform may need to be at a fixed possition but wont know that untill much later. all I need is that waveform able to drive a FET from a 12v power supply for now.That means that the the above needs correcting to 50us/division. I will do it and post later.
Timescope
Ive lost it Timescope, I changed something i cant find again or burnt up sometrhing i havent found yet :/ Is there kind of program to help figure them out or anything ?What values did you use ? I have been working on a fully adjustable version of the circuit that is not finished yet.
Timescope
Then I found out that the scope was set to 50us/division so the frequency isIm wanting a variable frequency and duty cycle with the circuit as well but even a fixed frequency of around 1286k will work.
Actually Timescope i cant remember the frequency... i think it was between 1k and 5k
So I am designing a variable version which is more complex and consists of two circuits : one to set the pulse repetition rate and the other to control the shape of the waveform.what we need is that waveform pictured with an amplitude of 10v and a frquency range from at least 1khz to 5 k.. a broader range in frequency would be most desirable but not an absolute must.