Here is a simple circuit for a one transistor Audion type radio powered by a 1.5 V battery. It employs a set of standard low-impedance headphones with the headphone socket wired so that the two sides ...

When we build an electronic project in 2016, the chances are that the active components will be integrated circuits containing an extremely large amount of functionality in a small space. Where once ...

So What Was the Transistor Good For? Transistors may have been useful to the phone company and to a handful of scientists building computers, but that wasn't enough to build an industry. Companies ...

My first battery-powered radio — a ten-transistor Realtone — came from my Aunt Ina when I was about seven. I used to think I was ten, but the songs from 1973 would be wrong: I distinctly remember ...

Today, you can walk into Dodger Stadium, device in hand. The device lets you make phone calls, send text messages, take photos, access statistics and replays, post your thoughts on social media, play ...

If you cultivate an interest in building radios it’s likely that you’ll at some point make a simple receiver. Perhaps a regenerative receiver, or maybe a direct conversion design, it’ll take a couple ...