Hello,
My stereo amp (NAD 317) when I turned it on started making a ratcheting up buzzer noise which would last about half a second then 'start up' (some relay would click on and all was well)... This lasted a few days until this weekend when I was going to have a look at it but today it no...
The square wave Its the output of an LDR, which is conditioned into the red line signal which is then scaled appropriately to be sent to various analog synthesizers ... There will be at least 10 of these sensor set ups.
The idea was to keep it all analog, but maybe a bunch of sample and hold...
I remember asking the same thing here years ago ...
Exactly the same issue - you have an output range from A to B and you want to scale it linearly so that A is now A1 and B is B1
A1 and B1 are within reason arbitrarily related to A and B - easy to do in code (with the possible resultant...
Hello,
Question simplified:
Say I had a 48Hz square wave whose high V value was modulated over time (see the black line in the first attached graphic) and I wanted to extract and output the curve of the modulation as a voltage (the red line)...
How would I go about this ?
Some thoughts that...
working now :) - So there is also a bit of work to do on the uP programming but I understand what is required (I'll need a 16bit I/O expander as well) -
hmmm, so what are all those NOR gates doing like that ? I am yet to understand them ...
I'd like to check it out but clicking on the pic or the text link below it pops up a window saying:
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Is there a paid subscriber function here ?
I hope I'm not being rude asking if you could post the schematic elsewhere ? :-X
thanks for your help...
Yep, thats definitely a start!
What do you have in mind ?
btw - the bottom limit off 100Hz is only because of the mechanical limits in the system thats its going to be finally impaled upon - it could go down to zero if need be, although the parts might not like that !
the odd frequencies I...
I was thinking yes I could enter Hz values into a uP and have a nifty LCD and telephone pad interface and let it do the math for me - but I'm still stuck with the same problem all along ... ok at one end in terms of resolution but then it all gets out of whack a the other end of the spectrum...
Just read your last reply - I'm understanding the 4059 a bit more now and should note that I meant the 4017 when i referred to the 4024 in my last post ...
Like I said tho I'm still stuck with dividing periods rather than working directly with Hz -
I want the value entered on the thumbwheel...
Okidoki - I've found some BCD thumbwheels locally: http://www.jaycar.co.nz/productView.asp?ID=SR1250&CATID=&keywords=bcd+switch&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=
So each digit is...
Hi,
I would like to build an device that provides a %50 cycle 0-5v square wave (easy!) - that has a range of frequencies that can be directly inputted from 100.0 Hz to 10,000.0 Hz (harder!) - I would like the 0.1 increments if possible ...
I've played around with a microcontroller called the...
The LDR cct is nice now, especially with the LPF on the input ...
I have a problem with having too many projects on the go at once - I will move onto one before completing the last... The LDR cct has taken a back foot as it is not really required until the new year - the latest project is more...
Hi,
I have never had problems with zapping components in digital ccts and have used a fair amount of different components that came in the static sensitive device bags...
The other day two components arrived in the aforementioned bags and they are worth $32US each. I thought it would be a...