Binary numbers in LEDs

Using Arduino Project Guidance
#1

Hi eveyone,

I'm quite struggling with binary. I have 8 LEDs and a slider potentiometer attached to my arduino. I want that the LEDs show in binary what value the slider gives. I already have the numbers in binary but I have no idea how to print these numbers to the LEDs.

How do you print them in leds??

(btw first question on this forum+not native English)

#2

I assume that the pot is connected to an analog input. AnalogRead returns an int (2 bytes) 0 to 1023. 8 bits can represent 0 to 255. So, the first thing is to divide the analogRead value by 4 so it will fit in a byte. Then use the bitRead function to read each bit and write each bit out to the proper pin. See the Reference for descriptions of the bit functions.

#3

Perfect solution from groundfungus.

However, all you need is the bitRead function. No bitClear or bitWrite.

And the code has to loop from 0 thru seven and each value is sent to a different digital output.

#4

Sorry, I realized that and edited my post to remove bitSet and bitClear. Not fast enough, I guess.

#5

You can also use arrays to make the code a lot shorter. http://www.thebox.myzen.co.uk/Tutorial/Arrays.html

#6