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  • How JFETs work -- DC to Daylight 15

    You don't have permission to edit metadata of this video. Edit media Dimensions x Small Medium Large Custom Subject (required) Brief Description…

  • #199: Measuring coil inductance and IF transformer resonant frequency

    This video shows a simple circuit that was shared by N4TMI in 73 magazine (no defunct, and archives freely available online). It shows a simple 2-transistor oscillator that can be used to test the resonant frequency of an unknown coil / inductor w...
    • https://youtube.com/watch?v=Ff5xOENID7w
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  • Cascode switching of red LEDs using JFET transistor

    Exciting video of red LEDs flashing
    • https://players.brightcove.net/1362235890001/default_default/index.html?videoId=6221077188001
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  • Make a Pierce Cristal Oscillator with 1 JFET

    For project14, I'm testing a Pierce oscillator circuit with a single JFET. Blog: https://www.element14.com/community/community/project14/makingtime/blog/2020/11/23/a-crystal-clock-with-1-transistor-the-pierce-oscillator Application note: https://w...
    • https://youtube.com/watch?v=f5j2ZsX65oA
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  • #219: Back to Basics: Introduction to Field Effect Transistors JFET MOSFET

    A basic introduction to the Field Effect Transistor (FET). This includes a basic description of the Junction FET (JFET) and the Metal Oxide FET (MOSFET), and also discusses N-Channel vs. P-Channel, as well as Depletion Mode and Enhancement Mode ty...
    • https://youtube.com/watch?v=oambDFa0Pr8
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  • How Transistors Work - The Learning Circuit

    Karen discusses transistors. Rather than using a physical, mechanical switch, a transistor can act as an electronic switch, using signals to turn it on or off. She'll go over what they are, how they work, and some types of transistors. She covers ...
    • https://youtube.com/watch?v=R0Uy4EL4xWs
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  • JFET Static Charge Detector

    In a recent element14 Essentials on Static Control , shabaz said this: " A 2N3819 + meter or LED makes a nice simple charge detector too : )" So, I thought I would try it. I don't have a 2N3819 but I do have a J112 N-channel JFET. The circuit is shown…

  • How Transistors Work -- The Learning Circuit 27

    element14 Presents Learn basic electronics, explore STEM subjects, get what you need to know to get started on electronics projects, and more. Back to element14 Presents homepage The Learning Circuit sudo Sergeant The Ben Heck Show …

  • JFET Colpitts Oscillator

    Introduction This one started last year with me just messing around on a windy, rain-swept day, seeing if I could do something simple with a JFET. It's taken quite a while to make it to the blog: I dropped it, started it again, stalled, and have now,…

  • Experimenting with a Cascode Switch

    This one came out of reading about GaN FETs in this 'essentials' blog: Semiconductors I GaNFETs for Power Conversion When I had a look at the datasheet for one of the parts being advertised, I realised from the equivalent circuit that it was a cascode…

  • Measure JFET drain current with a current mirror - part 2: build and measure

    I learned a trick from w2aew : how to measure current if you don't have a current probe. He's using a N-channel JFET as example. I adapted it to a P-channel type - the J176. This second post is the practical part. No talk and simulation. A real circuit…

  • Measure JFET drain current with a current mirror

    I learned a trick from w2aew : how to measure current if you don't have a current probe. He's using a N-channel JFET as example. I adapted it to a P-channel type - the J176. w2aew describes this in a video . He also published the notes . Follow and understand…

  • Simple analog JFET switch - part 2: linear range and limitations

    I reviewed an analog small signal switch in post 1: Simple analog JFET switch - part 1: schema, simulate and test . Here I'm checking what the limits are - the small linear part of the operational region where the P-channel JFET acts as a resistor. The…

  • Simple analog JFET switch - part 1: schema, simulate and test

    A simple low signal / audio "soft" switch with a p-channel JFET. It's very easy to make, with common components. Low power. The circuit is published on neatcircuits.com I've ordered a set of transistors to play with. One of them is a ON Semiconductor…

  • Plotting the Output Characteristics of a JFET

    Introduction More experimenting. This time I thought I'd have a look at the output characteristics of a JFET. Sometimes these things go well and sometimes they don't. This one didn't go too well but, for all that, I'm going to blog it as I did it rather…

  • Plotting the Transfer Characteristic of a JFET

    Introduction Having used JFETs (type BF256B BF256B ) in some of my test circuits whilst experimenting with MOSFETs, I thought it might be interesting to look at the transfer function and see if I could recreate the curve you sometimes see on a datasheet…

  • Experimenting with MOSFETS: Total Gate Charge

    Introduction More experimenting, this time with MOSFETs. If you've ever designed with a MOSFET, I'm sure you've seen the kind of curves that are usually present in the datasheet showing the relationship between the total gate charge and the gate voltage…

  • jc2048 Blog Index

    Electronic Art 9 Pieces of Pi: Slice 1: The Long Way Round 9 Pieces of Pi: Slice 2: Manifesto for Art Electronic 9 Pieces of Pi: Slice 3: Trickle Down to the Brave New World (This Way!) 9 Pieces of Pi: Slice 4: Fast Forward micro:bit The micro:bit Quartet…