Electronics > Beginners
Portable Low Frequency square wave generator circuit - Solved - page 3
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spec:
+ Laszlo

If you are still around please look at your PM inbox.
soldar:

--- Quote from: Zero999 on January 31, 2019, 01:28:45 pm ---... an adjustable frequency from 1Hz to 1kHz ....
--- End quote ---
I would spread this over three switchable ranges because over a single range I think it is too much and you get not enough ability to set a precise frequency. 1 to 10 Hz, 10 - 100 Hz and 100 to 1000 Hz.
spec:

--- Quote from: soldar on January 31, 2019, 02:36:41 pm ---[Again, this is a quick and simple solution, not the best or most sophisticated. I think it would be enough for this type of application though.
--- End quote ---
What a presumptuous fellow you are. >:(

As I have said before to all you armchair 'experts': Let us see your complete circuit, embodying all these wonderful ideas that you have.
spec:

--- Quote from: soldar on January 31, 2019, 03:00:06 pm ---
--- Quote from: Zero999 on January 31, 2019, 01:28:45 pm ---... an adjustable frequency from 1Hz to 1kHz ....
--- End quote ---
I would spread this over three switchable ranges because over a single range I think it is too much and you get not enough ability to set a precise frequency. 1 to 10 Hz, 10 - 100 Hz and 100 to 1000 Hz.

--- End quote ---
Do you really think that I haven't thought of all this stuff. I was hoping that the usability could be discussed with the OP. Anyway, if I had posted my circuit with range switching, that would have been a golden opportunity for you to say it is too complicated and expensive and it could be done with one pot and one capacitor.

One thing that surprises me is that no one has commented on the circuits effect on global warming. After all there is a whole 1W2 being dissipated in the output stage.:-DD
spec:
What on earth is all this mark to space ratio stuff all about? The circuit as presented will meet the OPs requirement and that is it.
There is no more to say.  By the way the 555 is a CMOS type.

Had I posted a circuit with a precision oscillator and exact 1:1 mark to space ratio, you could imagine what the comments would have been then ... to complicated- I would have done it with a 555. |O
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