Search found 12 matches

.75V should be 100 on the display and 1V should be 200 on the display.

So as the voltage goes down the scale needs to go up.

Thanks,
Donnie

Iam using the 16F876 as a meter. What i need to do is as the voltage decreases i need to display a number that increases on the display.
What i have is a log det that as the power increase a voltage ...

Is there a way to get it to work without the RA3 REF?

Thanks,
Donnie

When i take the 8313 chip out it goes to zero and the voltage don't change may have to add some caps to the signal line.
I just don't want to clamp down to much.

Donnie

No drooping or sagging. But when i feed rf into the AD8313 Channel 1 port, you can see the voltage on channel 2 port change.
The 10K resistors are there to help make it stable incase the AD8313 goes ...

Iam using delay_ms(100)
If you apply the voltage from the AD8313 to Channel 4 all the channels change.

Donnie

Here is my code:
[co#include <16F876.h>
#fuses XT,NOWDT,NOPROTECT,NOPUT,NOB ...

Has anyone had a problem with port to port isolation ?
I have 10K pullup resistors on the A0,A1,A3 ports.
When a voltage changes on A3 it also changes the value of A0 port.

Thanks,
Donnie

Thanks for the info.
Iam going to use the HMC394LP4 programmable divider chip.
With a divide by 20 1ghz in will equal 50 mhz out and will even do divide by 32.

Thnaks,
Donnie

I see that you can make a 50mhz frequency counter using a pic chip. Is it possible to do a /256 calc on the input code to allow it to count to 1 Ghz?
I know i can use a prescaler like a SAB6456 to di ...

Got it. Looks ok so far.
Thanks for all your help..

BTW: Now at looking at the math a few things are slowly coming back. Its hell to be getting old..

Donnie Lee

Thanks for any help you can give a newbie..

Donnie

I still can not get .5V to display 1mw.
Here is my code, I know iam missing something but can't figure out what.
Ref Voltage is 2.41V on RA3
Inout is .5 (1mw) to 1.75 (250mw)

#include <16F876 ...