raspberry-useful-websites

https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-resistor-color-code-4-band

http://www.resistor-calculator.com

https://www.arrow.com/en/research-and-events/articles/resistor-color-code

https://www.google.com/search?q=resistor+in+series+and+parallel&client=safari&rls=en&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi868XZkbjiAhUSAxAIHemSBwMQ_AUIDigB&biw=1263&bih=610#imgrc=rOjlswQTrVzhFM:

https://www.allaboutcircuits.com/tools/

https://www.google.com/search?q=ohm%27s+law&sa=X&hl=en&biw=1263&bih=610&tbm=isch&source=iu&ictx=1&fir=l3UgvptW6fvEZM%253A%252C7EGt-DySHAlgIM%252C%252Fm%252F0d2z8&vet=1&usg=AI4_-kTZCdcJhO2VzBF2NY14oEfwE4q9vg&ved=2ahUKEwiC8PjDkbjiAhUfAhAIHT3qD0MQ_h0wJHoECAoQDg#imgrc=B7Ff41Wp8q_-VM:&vet=1

http://www.ohmslawcalculator.com/ohms-law-calculator

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/dcex3.html