Marrold's Blog

I've recently been playing with telephone dials again, and discovered that a handheld dial tester existed which would save faffing aroun...

  I've previously written a  blog post  on using a Digital Oscilloscope to adjust the dial in a telephone, but it assumed the dial had b...

I've been playing around with  BBC Micro Computers recently. I've "accidentally" come to own 3 of them, having picked one...

 The BBC Micro computer uses an almost extinct 5 Pin "Domino" DIN connector for its RS423 (RS232 compatible) serial port. I wanted...

I've got some Amateur Radio projects in the pipeline that will require the ability to turn off the radio remotely in the event of a faul...

5 years ago I wrote a blog post on  Flashing MMDVM onto an STM32 Nucleo with OSX . Well, good news patient readers, I'm back with a new ...

I needed to get a GPS signal for a couple of upcoming projects that use it for time synchronisation. The problem? Where I intend to place th...