Re-purposing an old Psion MC400 laptop mechanical keyboard from 1989 to work with USB via a Teensy LC (Arduino compatible) microcontroller
Tag Archives: electronics
Grafana, Influxdb & DS18B20 based home temperature monitoring with Raspberry Pi
Update on the Raspberry Pi/Grafana/Influxdb/DS18B20 temperature monitoring network I put together 2 years ago…
One of The Many Promises of 5G – Accurate Time Transfer
One of the many promises of 5G is accurate time-transfer. I spent a couple of days travelling around the North West of England testing exactly how accurate available time transfer was from commercially deployed 5G installations.
10 years of Raspberry Pi
So the Raspberry Pi has been around for 10 years… everyone’s favourite credit-card-sized computer does just about everything
Emulating the Psion MC400
I read an online post about creating an “MC400 emulator”. That got me thinking about the ROM, and the 28F010 flash chips that realise it…
RS232 flow-control & handshaking – Psion MC400 retro communications
Connecting my retro-laptop to the internet via 2 x RS232 serial connections to a Raspberry Pi… and defeated (for now) by lack of hardware flow-control signals 😦
5G on the moon?
NASA has ambitions to build a comms infrastructure on the moon using 4G LTE technology…
Magellan GPS 315 vs. The Future – part 2
Some older GPS receivers can’t compute dates properly thanks to the original GPS system employing an epoch with 10-bit week number… a new epoch starts every 1024 weeks!
Magellan GPS 315 vs. The Future – part 1
Comparing a handheld 1990s dedicated GPS receiver with the GNSS chip in a 2019 smartphone
“Electronics & Music Maker” – archiving a demo cassette from 1982
“Electronics & Music Maker” (E&MM) was a magazine aimed at home/hobby music makers that started in the early 1980s and was produced as an offshoot of the mighty Maplin electronic component distribution empire. The idea was that it would promote more sales and engagement with Maplin’s component business through projects & DIY features based aroundContinue reading ““Electronics & Music Maker” – archiving a demo cassette from 1982″
Room 7609 