RPi3 Blinking LED
Goal : Simple LED to Raspberry Pi 3 B wiring set-up to use with various tests like 4DIAC. Side Goal: Learn some basic electronics so not always asking EE with 4DIAC - how, why LED wiring used http://www.resistor-calculator.com/ LED Resistor Value Calculator LED used is 5mm, so chose a 330 Ohm resistor greater than minimum needed. Raspberry Pi 3 Model B v1.2 Pin layout 2 Tests for + output to LED: 1. Pin 1 = 3.3 V output to LED 2. Pin 7 Output to LED: GPIO04 Pin 6 GND was used for - output ground. https://www.jameco.com/Jameco/workshop/circuitnotes/raspberry-pi-circuit-note.html https://www.raspberrypi.org/documentation/usage/gpio-plus-and-raspi2/ sysfs from term command line What worked: To have authority to do commands sudo su [Note: sudo -i for root environment, suggested, but internet posts indicate it can cause problems easier.] For GPIO pin using to test and change on/off: Test with GPIO4 (note: ...

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