Joe’s Hobby Electronics

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Author: joe.farr@gmail.com

  • PICKIT2 and PIC18F25K22… again

    n June 2012, I wrote a blog article on how to update the PICKIT2 to support the 18F25K22 PIC device. This is easy to do and just requires updating the local software device file, and I provided a link to the page on the Microchip site where you could download the required updates. Unfortunately, and…

  • New digital thermometer clock firmware v8

    I was contacted a couple of days ago about the possibility of changing my digital themo clock to also show the date.It sounded like a quick change and as the RTC chip does have the date available, it seem like a quick project for a rainy afternoon. It actually took a lot longer than I…

  • Bench Audio Amplifier

    This is a simple audio amplifier project suitable for the workbench. It has it’s own internal mains PSU but this can be substituted for an external PSU for those constructions not comfortable working with mains electricity. It provides a pre-amplifier module, three-band equaliser and has output short-circuit and thermal protection and a maximum 5 watts…

  • Build a simple FM transmitter

    This article shows you how to build a very simple FM transmitter from thirteen components (one of these you make yourself), a Printed Circuit Board (PCB) and a 9v battery. It should be mentioned that this unit will be illegal in some countries as it transmits on the FM band anywhere from around 70 to…