Blinking LEDs

Writing an LED Program

To make the lights blink, use the following instructions:

• ld a,<num> |
• out (0),a |

Here are some simple examples.

What Is This?

Use a simple programming language to turn LED lights on and off.

LED lights can be turned off and on according to the 8-bit representation of a binary number stored in memory. For example, in a program that stores the value 2 in the variable 'a', and then calls the output command, the second from the right bulb will turn on. 2 = 0000010 which corresponds to turning on the second from the right bulb.

Likewise, a program that stores the value 3 in the variable 'x' and then calls the output command, will light up the two right-most bulbs. 3 = 0000011 which corresponds to turning on the two right-most bulbs.

Multiple calls to output will be shown with a delay of 1 second between them. This creates a nifty animation as the bulbs cycle through commands!

Why?

This is part of a programming challenge, posted on /r/dailyprogrammer

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