It's been asked before and i've been looking at previous threads but the fundamental's of AC in a DC circuit is just giving me grief.
Ground and 0v DC (are not the same but similar?) So take a look at the image i included... now here's what I don't get, you'll see I set it to output a sine wave, I then tried to DC rectify it somewhat by using a single diode and 1 hert, and they i played with some ridiculously values, meanwhile trying to find out what effect an inductor does in series with a large cap.
Now why does this circuit need ground? and in the real world where does Ground come from? i was expecting to be able to use the Sine Wave and make a ground, but 'Computer says no' or rather LTspice does.. all this came about because I was trying to work out how to amplify the signal with just a simple transistor (Obviously, depending on the Frequency and Transistor, it might not be able to switch fast enough)..
So I stuck with a low low radio frequency, around the 300khz range, now this has NOTHING to do with radio, after giving up on that I then took the output from my MP3 player.. still could not get it working, the DC/AC and joining them together is confusing..
So taking an MP3 player output, I have Common which links to both the Left/Right channels, but is Common 'ground'?
Common to 0v?
Left/Right Channel to the base of the Transistor?
All i know is i've had a lot of smoke, the idea was to increase the volume, I know that the wrong transistor is bad, eg switching speed, noise being produced etc...
But surely it's possible to to gain the imput from a single transistor? I don't mind that it crackles or you can barely hear it, I just wanted to get a small gain boost on the out, and I'm not sure which outs need to be connected where, what's the basic theory?
So back to my LTSpice, why is Ground needed? -12 to +12dc rectified can't I use output sinewave to make my own ground? otherwise where is ground in real life? 1.5v battery for example, ground is the negative terminal, where is ground on an AC sinewave output?
I'm basically confused, DC makes sense, integrating AC into DC is the issues im having, DC to power the circuit, DC to feed to the Transistor, Collector/Base/Emitter where's the AC output connect in a DC circuit? All i've managed to do is blow a sound card up... long story and I also managed to blow an op-amp because of wiring.... what am I missing here?
Ground and 0v DC (are not the same but similar?) So take a look at the image i included... now here's what I don't get, you'll see I set it to output a sine wave, I then tried to DC rectify it somewhat by using a single diode and 1 hert, and they i played with some ridiculously values, meanwhile trying to find out what effect an inductor does in series with a large cap.
Now why does this circuit need ground? and in the real world where does Ground come from? i was expecting to be able to use the Sine Wave and make a ground, but 'Computer says no' or rather LTspice does.. all this came about because I was trying to work out how to amplify the signal with just a simple transistor (Obviously, depending on the Frequency and Transistor, it might not be able to switch fast enough)..
So I stuck with a low low radio frequency, around the 300khz range, now this has NOTHING to do with radio, after giving up on that I then took the output from my MP3 player.. still could not get it working, the DC/AC and joining them together is confusing..
So taking an MP3 player output, I have Common which links to both the Left/Right channels, but is Common 'ground'?
Common to 0v?
Left/Right Channel to the base of the Transistor?
All i know is i've had a lot of smoke, the idea was to increase the volume, I know that the wrong transistor is bad, eg switching speed, noise being produced etc...
But surely it's possible to to gain the imput from a single transistor? I don't mind that it crackles or you can barely hear it, I just wanted to get a small gain boost on the out, and I'm not sure which outs need to be connected where, what's the basic theory?
So back to my LTSpice, why is Ground needed? -12 to +12dc rectified can't I use output sinewave to make my own ground? otherwise where is ground in real life? 1.5v battery for example, ground is the negative terminal, where is ground on an AC sinewave output?
I'm basically confused, DC makes sense, integrating AC into DC is the issues im having, DC to power the circuit, DC to feed to the Transistor, Collector/Base/Emitter where's the AC output connect in a DC circuit? All i've managed to do is blow a sound card up... long story and I also managed to blow an op-amp because of wiring.... what am I missing here?