M1 Input expander pull up resistor numbers??

[fleetz]

Hi Guys,

I am wanting to monitor and right rules based around a 0V to 4.8V voltage change. I need to remove the 8 pull up resistors on the M1 input expander board, can anyone help me with the "R" numbers?? I have the right tools to remove them just need to know which ones.

Appreciate any help.

Regards,

Fleetz

 

[BraveSirRobbin]

If Spanky doesn't respond I'm hoping znelbok will have the answers you seek:

http://www.cocoontech.com/index.php?showto...l=surface+mount

Also, you may want to try leaving the resistors in. If your sensor/input has a voltage drive that can overcome the pullup resistor, it may read correctly.

 

[fleetz]

If Spanky doesn't respond I'm hoping znelbok will have the answers you seek:

http://www.cocoontech.com/index.php?showto...l=surface+mount

Also, you may want to try leaving the resistors in. If your sensor/input has a voltage drive that can overcome the pullup resistor, it may read correctly.

Thanks BSR,

I believe I have worked it out using a multimeter and some logic.

No I had to remove the resistors as the LED drive impendance was too high and the pull up resistor prevailed ..... For future reference on the following M1XIN REV.E board the following 16 resistors

Zn 1 R4
Zn 2 R18
Zn 3 R19
Zn 4 R20
Zn 5 R26
Zn 6 R27
Zn 7 R28
Zn 8 R25
Zn 9 R29
Zn10 R32
Zn11 R31
Zn12 R30
Zn13 R24
Zn14 R23
Zn15 R22
Zn16 R21

They are all SMD 2000ohm marked 2001 on the body.

I am now seeing the LED drive voltage at the Zone input so all good, I am now trying to write the synchronosing rule. Hmmm a bit of a head scratcher. Will keep trying an it now luck post a seperate thread.

Thanks for the pointer to the thread...

Regards,

Fleetz

 

[znelbok]

I don't remember off hand but it appears that you do have the right one identified.

Mick

 

[fleetz]

I don't remember off hand but it appears that you do have the right one identified.

Mick

Hi Mick.

Confirmed the correct ones are listed now have my voltage sensing application working a treat. It needs to be qualified that the resistors I have mentioned are applicable to the version board stated...so others please check your board revision before adopting those R numbers.

Regards,

Fleetz