Hey Steve,
I was under the impression that we were able to get this ramping result without adding any other voltage offsets. So I guess we need to add an offset.
So I have recreated the circuit and tested it.
the circuit works perfectly when the bias offset is at -0.5VDC as opposed to -1 VDC...
Hi Steve,
I’m trying to review all this op amp stuff.... sorry
if I’m slow.
What do you mean exactly by 3-(5/ 1.5)
And also where do I need to provide a -1/3
volt bias??? At the input (to the right of ra?)
Thanks
Hello,
I have tried all day to make sense of this... calculation after calculation and I really don't get it.
I need some clear and concise help !!! :(
Please refer to the image attached.
I would like to be able to build and calculate (for my personal learning) an op amp that takes a 3 to...
Hi Bob,
After looking at the LM324 it seems like it’s
Single or dual supply.... I could be wrong
but it says +/-16VDC
Anyways I don’t have the data sheet in front of me but I do remember seeing that it can work
As single supply ground to +32VDV
Or
+16VDC to -16VDC
24v
Ok steve thanks for your help...
I’ll review some electronics and get back to you.
I think today we all try to do too much, lol
Between doing company administration, MCU programming, CPLD and RF development studio softwares and PCB manufacturing softwares .... where is one on top of all that...
Hello fellows,
Ok I need to review all my transistor and op amp theory notes cause I don’t remember
a lot of stuff. Also I realized I never really built a voltage controlled current source circuit so I’ve got a lot of work on my plate here :-(
So I googled “voltage controlled current source”...
Hi Steve,
Thank you for replying !
It’s 5 years ago I haven’t touched this circuit so I’m a littl out of touch.... ☺️
So you mean connect one end of the resistor to the output of my op amp and the other end to of the resistor to the positive of my Led and the other side of my led to ground...
hello,
I have a ramping voltage signal of 0.4VDC to 1VDC commingbout of an op amp.
I need that signal to control linearly an IR
led’s current that can vary from 0-1A.
Therefore I want to convert a
0,4VDC-1VDC to 0A -1A
Therefore the output of my
op amp needs to go to a device
that can drive...
Hello,
I was thinking to try and do my own PCB layouts myself And then generate the gerber files so I can Give them to my PCB manufacturer.
But I never used such a software and I would like to ask this forum which one I should use?
It should allow me to design layouts from the smallest to...
Hi folks,
Sorry for the delay!
I am using the erf32fg1p133f256gm48 RF MCU from Silabs and here is the kit I bought:
https://www.silabs.com/products/development-tools/wireless/proprietary/slwstk6060b-efr32-flex-gecko-915-mhz-2-4-ghz-and-sub-ghz-starter-kit
I have been reading up on RF tuning...
Hi Kellys_eye,
Thanks for replying,
It’s 900 MHZ...
I could post the schematics if you want, but what I don’t understand is what is it that they would do when adjusting.... ?
Do they just adjust the thickness of the traces or do they also alter the components ???
Also, how do they do...