Joe’s Hobby Electronics

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  • Everything you want to know about power supplies.

    This series of articles will look at everything related to power supplies (PSU’s). Power Supplies 101 – Part 1 In this set of articles, I’m going to be looking at mains powered linear PSU’s, but before we start, a word of caution. You should already be aware that the domestic mains voltage, which can range…

  • Shift Registers

    Shift registers are wonderful things and especially useful to the hobbyist who never seems to have enough I/O pins on the CPU/MPC they want to use. So, with a view to helping explain these misunderstood little scamps, many years ago I wrote this to help explain them, how they work and a practical example of…

  • Microchip IC Package Specs.

    A PDF file from Microchip detailing all the different package types they have for their products… and there are a lot of them.

  • AC Single-Phase Motors Horsepower Ratings

    A PDF document containing a primer on Single-Phase AC motor horsepower ratings.

  • Understanding PSUs and inrush current

    A PDF file containing a brief article on understanding inrush current is power supplies.

  • Voltage level shifting between 5v and 3v devices

    It’s not difficult these days to end up with a design where several of the major components all have different operating voltage requirements. A typical example may be a PIC running at 5v for performance reasons, most LCD modules also need 5v, but Microchip’s new Serial SRAMs require 3.6v and here’s the problem; connecting these Serial…