Simple Basic LED Circuit (How to Use LEDs) : 4 Steps - Instructables
Can the same 9V supply used to power Arduino, also be used on the output side of a relay? - Project Guidance - Arduino Forum
Simple LED circuit with 9V battery – helloCircuits!
How to Connect Single LED to 9V Battery with Resistor & ON/OFF Switch | Connection Tutorials - YouTube
What Resistor Do I Need For an LED | DigiKey Electronics
Resistor-led-circuit-sizing - The Engineering Mindset
How to select resistor value for LED with simple calculation (Ohm's Law) - YouTube
Simple Basic LED Circuit (How to Use LEDs) : 4 Steps - Instructables
File:9v battery and led circuit components (wires, battery, LED, resistor).jpg - Wikimedia Commons
LED Resistor Value Calculator – Kitronik Ltd
Basic LED circuit, 9v battery, what resistors to use?
Which Resistor Should I Use with my LED? – Kitronik Ltd
power supply - Should I use resistors for LED - Electrical Engineering Stack Exchange
What amount of resistance do I need to lower the voltage from a 9V battery to an LED? How do I calculate it? The LED is about 2V. - Quora
Basics: Picking Resistors for LEDs | Evil Mad Scientist Laboratories
How to connect LED with 9v battery, Resistor, LED, 9v battery connection tutorial - YouTube
Pre-Wired 3mm/5mm Various Colours LEDs Prewired Resistor for 9V - 12V DC use | eBay
L1: Turning on an LED - Physical Computing
How To Choose an LED Power Supply - LEDSupply Blog
Could someone help me understand why (in the circuit pictured) it doesn't matter if the resistor is positioned after the LED? : r/AskElectronics
How to select resistor value for LED with simple calculation (Ohm's Law) - YouTube
