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mramos1 said:That is the way I am doing it now. Just tring to do it cheaper. Thank for the replies.
Ron H said:Some more related questions:
What is the load on your output square wave? Do you have any power supplies available, or does this all have to be powered by the 9V square wave? If the latter, what is the impedance of the 9V square wave?
Ron H said:Will this work?
Theoretically, you only need one R and one C.
Yeah, I was thinking that as I was drawing it.Nigel Goodwin said:Ron H said:Will this work?
Theoretically, you only need one R and one C.
Clever idea! - a bridged output, just like car audio amplifiers!.
Ron H said:Yeah, I was thinking that as I was drawing it.Nigel Goodwin said:Ron H said:Will this work?
Theoretically, you only need one R and one C.
Clever idea! - a bridged output, just like car audio amplifiers!.
Not the clever part - the bridged part.
I'm too modest to admit that I'm clever.
Yep - the number one problem we face seems to be the appallingly poor problem definition by many (most?) of the people posting questions here.Nigel Goodwin said:Ron H said:Yeah, I was thinking that as I was drawing it.Nigel Goodwin said:Ron H said:Will this work?
Theoretically, you only need one R and one C.
Clever idea! - a bridged output, just like car audio amplifiers!.
Not the clever part - the bridged part.
I'm too modest to admit that I'm clever.
But until we were told what it was needed to do, it wasn't really an option!.
mramos1 said:Not sure if that will work, but easy enough to build and see.
I will have a 9V square wave out of the 555, Not sure how I will have a larger square wave (over 9V) out that swings plus and minus of a common reference point. Will be nice if it is that simple.
It's a standard technique called 'bridging', it provides twice the output swing of a single ended system - for car audio use a single ended 4W amplifier becomes a 16W bridged amplifier by using two anti-phase 4W amplifiers.
mramos1 said:It's a standard technique called 'bridging', it provides twice the output swing of a single ended system - for car audio use a single ended 4W amplifier becomes a 16W bridged amplifier by using two anti-phase 4W amplifiers.
That is cool.. But would one R be my scope grounding point or the ground on the 555? It will be a square wave over 9V (say it was 14V) and I would see +7 and -7V?
Ron H said:Most 10X scope probes are 10Meg input resistance. If you use one 10Meg resistor on your circuit, your scope will attenuate the signal by 50%, so you'll only see 9V p-p. If you use two 10Meg resistors, you'll only see 6V p-p. If you want to see full amplitude, measure on the other side of the resistors.