Ian Poole

Electronics Notes, now incorporating Radio-Electronics.com provides radio & electronics tutorials and notes covering basic electronics concepts, components, radio technology, constructional techniques, ham radio, & electronics history…
Electronics Notes is written and run by Ian Poole

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HDMI connector

HDMI Connectors:   Knowing about the different types of HDMI connector, ensures that the right cables and other attachments are bought. If not then many adaptors are available. Read more . . . . .
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What's on ElectronicsNotes:

Buying Guides

Testing & Test Equipment


Electronic components

Antennas and propagation


Basic concepts


Circuits & circuit design

Ham radio

Audio Visual

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Technology History

Morse Key Development

A history of the developments made to the Morse key from the earliest Correspondent key made by Alfred Vail through the Camelback, Steel lever Key, military keys to the semi-automatic and fully automatic bug keys.