2017 – Matt's Tech Pages

MC34063: A tough lesson

September 30, 2017December 2, 2020 Circuit snippets

As a keen electronics hobbyist, I have designed some 50 or so PCBs to date. In each instance where a switching regulator is required, I’m typically reaching for one of…Continue readingMC34063: A tough lesson

An easy way to mount DS18B20 temperature sensors

August 13, 2017October 27, 2020 Bits and pieces

One of the biggest advantage of these sensors over I2C sensors, is that you can mount them almost anywhere. That having been said, I’ve never quite managed to come up…Continue readingAn easy way to mount DS18B20 temperature sensors

ROVAEdit Readme published

June 8, 2017December 28, 2020 LCD

When I first started work on ROVA Tools around about 7 years ago, RTD2120+RTD2545 based platforms comprised the majority of the hobbyist LCD controller market. I personally spent a lot…Continue readingROVAEdit Readme published

A simple low battery detection circuit with hysteresis

May 23, 2017December 2, 2020 Circuit snippets

I recently found myself needing a simple circuit which could detect a low battery condition of a sealed lead acid setup, but also with a hysteresis function i.e. don’t re-enable…Continue readingA simple low battery detection circuit with hysteresis

Making use of recycled Xilinx XC9500 CPLDs

May 21, 2017May 25, 2017 Bits and pieces

If you happen to be producing boards which use Xilinx’s long discontinued classic 5V CPLDs which are purchased as scrap from the far east (which I hope you are not);…Continue readingMaking use of recycled Xilinx XC9500 CPLDs

Converting an IBM PC 5150 “Model A” black 115V power supply to 230V

January 22, 2017December 2, 2020 Repair / modification

After several weeks of head scratching, I can now power up my U.S. model IBM PC 5150, after converting its power supply from 115V input to 230V. Full details here.

Building an AT2XTKB (AT to XT) keyboard adapter on prototype board

January 12, 2017December 27, 2021 Vintage PC

If you like me you find yourself wanting an AT2XT adapter, you may have also discovered that they are not too easy to buy pre-made. Project information here Here is…Continue readingBuilding an AT2XTKB (AT to XT) keyboard adapter on prototype board

Year: 2017

MC34063: A tough lesson

An easy way to mount DS18B20 temperature sensors

ROVAEdit Readme published

A simple low battery detection circuit with hysteresis

Making use of recycled Xilinx XC9500 CPLDs

Converting an IBM PC 5150 “Model A” black 115V power supply to 230V

Building an AT2XTKB (AT to XT) keyboard adapter on prototype board

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