Welcome, Guest. Please login or register.
Did you miss your activation email?
May 23, 2012, 09:42:38 PM

Login with username, password and session length
Search:     Advanced search
* Home Help Search Calendar Links Login Register
+  Machsupport Forum
|-+  Third party software and hardware support forums.
| |-+  PoKeys (Moderator: NeoTO)
| | |-+  potentiometer voltage
Pages: 1   Go Down
« previous next »
Print
Author Topic: potentiometer voltage  (Read 1385 times)
0 Members and 1 Guest are viewing this topic.
Bill_O
Active Member

Offline Offline

Posts: 104



View Profile
« on: March 05, 2009, 01:14:12 PM »
Can the voltage for pots be 5 instead of 3.3?
I want to use a hall effect joystick and they only work with 5.
Bill
Logged
borisz
Active Member

Offline Offline

Posts: 209



View Profile WWW
« Reply #1 on: March 05, 2009, 01:24:50 PM »
It can be 5V, but it will measure only up to 3,3V.
Probaly it can be done with simple resistor divider.
What is the resistance of potentiometer?

regards

Boris
Logged
www.poscope.com home of PoKeys USB HID, IO, USB, Ethernet controler and PoScope USB PC oscilloscope
Bill_O
Active Member

Offline Offline

Posts: 104



View Profile
« Reply #2 on: March 05, 2009, 02:25:39 PM »
Boris,
So if I use the 5v from the pokeys instead of the 3.3v it will not blow up my pokeys or pc?
Bill
Logged
borisz
Active Member

Offline Offline

Posts: 209



View Profile WWW
« Reply #3 on: March 05, 2009, 03:01:06 PM »
It is limited to 5V, but it will measure only up to 3,3V.
If more than 5V e.g. 5,1V will be connected analog inputs will be blown.
For security reason, my opinion is that you shoud limit voltage to 3,3V. Please write more about your application and about your potentiometer and I will suggest you right solution.

regards

Boris
Logged
www.poscope.com home of PoKeys USB HID, IO, USB, Ethernet controler and PoScope USB PC oscilloscope
M250cnc
Active Member

Offline Offline

Posts: 591




View Profile
« Reply #4 on: April 15, 2009, 10:26:40 AM »
Hi Borisz

Is it OK to use a separate supply of 3.3v for the pots

I use a PC power supply for my 5 & 12v but they also can supply 3.3v so this seems ideal ?

Thanks
Logged
The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable
borisz
Active Member

Offline Offline

Posts: 209



View Profile WWW
« Reply #5 on: April 15, 2009, 10:52:44 AM »
It should be OK.

regards

Boris
Logged
www.poscope.com home of PoKeys USB HID, IO, USB, Ethernet controler and PoScope USB PC oscilloscope
Pages: 1   Go Up
Print
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.16 | SMF © 2011, Simple Machines Valid XHTML 1.0! Valid CSS!