Here's a guess: Mr. Microchip
From TVarchive.ca, a short summary:
Mr. Microchip was CBC's first formal venture into programming about
computers for children. A show to be shared by parents with children,
its aim was to demystify computers and their functions.
With Skip Lumley, a computer business consultant, neighbours Dayna Simon and Steve Grosfield learned about and worked with computers in
Lumley's garage. Each program was devoted to one aspect of computer
functions. An attempt was made to put computers in their proper social
and human context.
As the series progressed, the audience learned, along with the kids,
how computers worked, how to tell them what to do, how computers'
brains compared with people's, where computers were used, and how they
could help us.
From WorldCat, here's an episode guide:
Episode 1: Information please
Mr. Microchip presents an overview of computers. He explains how
computers work, and how they can be used to solve problems, design
objects, and monitor operations. Basic computer terms are defined, and
home systems are differentiated from professional systems.
Episode 2: Bits of programming
Mr. Microchip discusses how the programs become more complex as the
computer grows in complexity. He also defines and describes
"upgrading" of computer systems.
Episode 3: Memory is made of this
Mr. Microchip explains the various types of computer memory (RAM, ROM,
floppy disk). He discusses how information is put into the computer
memory, and clarifies the differences between human memory
(associative) and the computer's perfect memory.
Episode 4: The computer has a code
Mr. Microchip gives an introduction about talking a computer's
language. He explains how information is stored via a binary code, and
the different languages in use, especially BASIC, the most widely
Episode 5: Problems, problems, problems
Mr. Microchip explains how the computer solves problems. He discusses
how the computer uses information and follows certain rules, and
whether or not computers can make mistakes.
A total of 13 episodes were aired. You can read about those using the WorldCat link above.
Here's the biggest (!) snap of the host I could find. Mr. Lumley seems to fit your description, but I've no clue if he sported a beard back in the 80s!
I also haven't come across anything to confirm whether or not the HERO 1 robot appeared on this show. Will add more information as soon as I do.