What if a doorbell never needed a battery and still sent signals wirelessly over long distances. This design can turn every ...

The circuit exemplifies the use of ZN414 IC to produce a handy AM radio receiver. ZN414 IC– a composition of transistor tuned radio frequency (TRF) circuit packaged in a 3-pin TO-92 plastic package ...

The regenerative radio is long-ago superseded in commercial receivers, but it remains a common project for electronics or radio enthusiasts seeking to make a simple receiver. It’s most often seen for ...

It is often required to switch electrical appliances from a distance without being a direct line of sight between the transmitter and receiver. As you may well know, an RF based wireless remote ...

If you cultivate an interest in building radios it’s likely that you’ll at some point make a simple receiver. Perhaps a ...

The relentless drive for higher performance and increased functional integration has ushered in new challenges for managing electromagnetic interference (EMI) in densely packed mixed-signal ...

A six tube tuned radio frequency (TRF) receiver employing 201A triodes. Only one tube is in place. Circuit has three radio frequency stages, a detector and two audio stages with transformer coupling.

Marked: (on instruction label) Diamond T Radio Mfrs. / South Bend, Indiana. / Serial Number 20978 (circuit pattern on label). Tuned Radio Frequency receiver employing three spider web coils in a ...