Episodes

296. Vacuum Tube Computing

296. Vacuum Tube Computing

How did computers get so small? Explore vacuum tube computing, early machines, floppy disks, and Dr. Billings’ firsthand stories from the early days of modern computers.

295. Tuned Radio

295. Tuned Radio

How do radios tune to one station? Learn how tuning selects frequencies and how the first wireless signal crossed the Atlantic.

294. Transistors

294. Transistors

What is a transistor and why does it matter? Learn how transistors replaced vacuum tubes and power radios, computers, and smartphones.

290. The Relay

290. The Relay

Discover how a relay works and why this clever electromagnetic switch is one of the most important tools in modern electronics.