SKR v1.3 - Sending 5v to signal on endstop? November 11, 2019 05:18PM |
Admin Registered: 11 years ago Posts: 3,096 |
Re: SKR v1.3 - Sending 5v to signal on endstop? November 11, 2019 05:54PM |
Admin Registered: 13 years ago Posts: 7,149 |
Re: SKR v1.3 - Sending 5v to signal on endstop? November 12, 2019 02:00PM |
Admin Registered: 11 years ago Posts: 3,096 |
Quote
Dust
Z- Is pin P1.25
In table 5 of the LPC1768 datasheet [www.nxp.com]
If you search for "P1[25]" you will find it listed in table 5, Pin description . Note It has a little [1] next to it.
If you click on the little [1] It takes you to a key where it lists what the little [1] is
"[1] 5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis. This pin is pulled up to a voltage level of 2.3 V to 2.6 V."
So yes the pin is a 5 volt tolerant.
Quote
Pippy
Try putting a low value pull-down resistor from the sense pin (on the 3-pin end stop connector) to GND, try say 330R resistor. That should overcome the SKR 10k pull-up resistor and provide a clean 0V/+5V to the sense pin as your probe is triggered/non-triggered.
Re: SKR v1.3 - Sending 5v to signal on endstop? November 13, 2019 01:44AM |
Admin Registered: 13 years ago Posts: 7,149 |
Re: SKR v1.3 - Sending 5v to signal on endstop? November 13, 2019 10:24AM |
Admin Registered: 11 years ago Posts: 3,096 |