PINE64   ›   PINE A64(+)   ›   Pine A64 Hardware, Accessories and POT   ›   Pi2, Euler and Exp GPIO Ports   ›   Testing the GPIO pins

Testing the GPIO pins
MarkHaysHarris777
Professor of The Pine
*****
Joined: Mar 2016
Posts: 1,948

Reputation: 148
#2
08-09-2016, 01:01 PM
I suspect that these pins have built-in current limiting resistors. I know this is true for at least the PL7 GP(359) !

PL7 is the system LED (on the board between the IR module female plug and the power button. (LED on the left)

This is designed for a 3mm low-power 2-4 ma LED. There is a 1000 ohm resistor in-line with this LED built-in. Hence, it is dimly lit (even with a low-power LED).
marcushh777    Cool

please join us for a chat @  irc.pine64.xyz:6667   or ssl  irc.pine64.xyz:6697

( I regret that I am not able to respond to personal messages;  let's meet on irc! )
  Reply


Messages In This Thread
Testing the GPIO pins - by shockr - 08-09-2016, 07:54 AM
RE: Testing the GPIO pins - by MarkHaysHarris777 - 08-09-2016, 01:01 PM
RE: Testing the GPIO pins - by martinayotte - 08-10-2016, 09:44 AM
RE: Testing the GPIO pins - by MarkHaysHarris777 - 08-10-2016, 10:53 AM
RE: Testing the GPIO pins - by martinayotte - 08-10-2016, 01:02 PM
RE: Testing the GPIO pins - by MarkHaysHarris777 - 08-10-2016, 01:38 PM
RE: Testing the GPIO pins - by martinayotte - 08-10-2016, 05:24 PM
RE: Testing the GPIO pins - by MarkHaysHarris777 - 08-10-2016, 05:30 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  How to use dts or other setup to declare gpio pin Interrupt (e.g. a button)? dkebler 2 3,974 11-26-2024, 09:58 AM
Last Post: disesob294
  RPi.GPIO python module for Pine A64/A64+ aquilegia 98 147,674 10-26-2024, 07:17 AM
Last Post: Garesdq1d
  fm transmitter with gpio weasel18 2 5,447 09-10-2019, 04:28 AM
Last Post: desai_amogh
Lightbulb Sample GPIO codes highlighting RPi.GPIO-PineA64 and the PI bus MarkHaysHarris777 6 12,341 06-07-2019, 12:37 AM
Last Post: tllim
Star GPIO, SPI and I2C C++ Lib databit 7 12,445 02-04-2019, 05:45 AM
Last Post: Jeff R
Information Howto: Controlling Pine64 GPIO via the filesystem (sysfs) on linux pfeerick 4 12,757 01-24-2019, 03:36 AM
Last Post: Fifth
  GPIO and SPI SamR1 20 34,934 03-15-2018, 10:32 AM
Last Post: jomoengineer
Question GPIO shockr 7 16,254 03-11-2018, 01:52 AM
Last Post: jomoengineer
  Read GPIO problem shworker 14 23,761 08-17-2017, 01:21 PM
Last Post: martinayotte
  GPIO fiq capability joseph 3 6,765 11-10-2016, 06:07 PM
Last Post: joseph

Forum Jump:


Users browsing this thread: 1 Guest(s)