A summary of all the things that are right with my 1991 Psion MC400 laptop, “online” via an attached Raspberry Pi 3B+ and wifi…
Tag Archives: maker
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 😦
“My Life in Laptops” – am I Doug Rocket?
My homage to Doug Rocket’s art installation at Place “MY LAPTOPS 1991-2005”. It’s well Mexico.
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!
Psion Series 3a vs. Technics RS-B665
Controlling my 1990s Technics tape deck from a 1990s PDA – Psion Series 3a remote control via NodeMCU
Reviving a relic – a time machine from the past – the Enhanced Waveform Generator
Reviving some 1990s era tech …
Reading a 27C512 EPROM with a Raspberry Pi – ROM-dumping!
Using Raspberry Pi GPIO to read the contents of an old 5V CMOS ROM
Technics RS-B665 Cassette Deck Remote Control
Creating a remote control for a 1990s tape-deck using raspberry pi, python, node-red and some relays. Features minimal hardware hacking of the tape deck itself… 😉
Tiny Oscilloscope kit based on STM32F103 ARM microcontroller
I discovered this tiny oscilloscope kit the other week. It’s a DSO138 by JYE Tech – £30 from Amazon(UK) or less than £20 if you can wait for delivery from China 🙂It took me less than 2 hours to build and worked first time! I’ve still got some soldering skills lol. It comes in twoContinue reading “Tiny Oscilloscope kit based on STM32F103 ARM microcontroller”
Replacing the white LED stylus target light on Audio-Technica AT-LP120X
Replacing the dreadful plastic-housed white LED stylus target light with a red one on the Audio-Technica AT-LP120X to match all the other LEDs on the turntable…
Grafana, Influxdb & telegraf based home temperature monitoring with Raspberry Pi and the humble DS18B20
Creating a temperature monitoring dashboard in Grafana to display temps from sensors all around the house. Running on Raspberry Pis and using the venerable DS18B20 one-wire sensor.
Flashing LEDs with a 555 timer – and not a lot else
Just dug this out of storage – some electronics I made in the late 80s/early 90s. Most of it is old/scrap components that were lying around on my desk – only the (socketed) 555 and MC14526 counter/divider actually do anything; flashing the LEDs along the edge. I can remember making it at work during quietContinue reading “Flashing LEDs with a 555 timer – and not a lot else”
Room 7609 