ElectronicsNotes by Ian Poole
@ElecNotes
Clear summaries, information & videos about electronics, radio & connectivity by Ian Poole . . . tech influencer
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I've just launched a new vintage valve / vacuum tube T-shirt on my online shop. This truly unique T-shirt shows some vintage valves or vacuum tubes from the first half of the 20th century. You can show off your interest in technology with this T-shirt that has been designed…
Did You Know Many SMD resistors Have Marking Codes These codes give the value of the resistor, but there’s more than one system. Although not all SMD resistors, or SMT resistors are marked with their values, some are, and in view of the lack of space the SMD resistor code…
I’ve just passed the 6 million video views on my YouTube channel. It’s taken a while, but the number of views is now going up as I’m now focussing on almost exclusively on electronic components. I’ve got a lot more component videos planned. In the meantime I’m rather happy…
Resistor Standard E-Series Values Infographic This infographic provides details of the standard values, E-series values that have been adopted for resistors and many other components. In order to provide a manageable number of resistor values to be used within circuit designs,…
1N4007 Rectifier Diode Data The 1N4007 and the other diodes in the series are described as being a general purpose rectifier with a low forward voltage drop, low leakage current and high forward surge capability. This device is the one with the highest reverse voltage rating,…
Did you know that in the 1950s and early 60s, transistors were often supplied jn individual boxes. This is probably a bit of a continuation of the methods used for valves. But transistors were quite expensive and certainly a novelty. As a result individual boxes, like the one…
Understand the Ionospheric Layers or Regions used in HF Ionospheric Radio Propagation The traditional view of the ionosphere indicates a number of distinct layers, each affecting HF radio communications in slightly different ways. Indeed, the early discoveries of the ionosphere…
The day of the 12th October 1582 does not exist in Italy, Poland, Portugal and Spain as a result of these countries changing to the Gregorian calendar.
TIP41, TIP41A, TIP41B, TIP41C Transistor Data The TIP41 series of transistors are described as NPN epitaxial silicon transistors for linear switching applications and complementary to the TIP42 series of PNP transistors. Although described as switching transistors they have…
Morse Code Coffee Mug Are you ready to add a dash of code to your day? Meet the Morse Code Alphabet Mug – the coolest way to enjoy your favourite drink while keeping the art of communication close at hand! This isn't any mug, it's a really cool Morse code mug. Featuring every…
Did you know:- Michael Faraday who discovered many of the basic foundations of electrical science was the son of a blacksmith and received little formal education.
What Makes SiC Scottky Diodes So Special? Silicon carbide diodes or SiC diodes are being used increasingly. In the form of a Schottky diode, they tend to be used for power applications. In these applications, the silicon carbide diodes are able to provide significant…
Understanding Quartz Crystal Resonators Quartz crystals are seen to have mystic properties in many areas of life . . . and I suppose they also do in electronics. It always amazes me quite how they well perform and with such high specifications. Quartz resonators are used in…
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