Logic Ethos Ltd

PiTelephone - Raspberry Pi retro dial phone

1970's GPO 746 Telephone VOIP conversion project
We use VOIP a lot (internet telephony). All our outgoing calls use VOIP, and most of the incoming ones too. Mostly SIP phones, or Skype. The old rotary dial telephones mak… https://37.220.31.213/blog/pitelephone-raspberry-pi-retro-dial-phone/

Raspberry Pi Touch Screen LCD

Connecting a 4D Systems Touch Screen LCD
I have just received a 4D Systems µLCD-32PT Touch display to hook up to a Raspberry Pi. This is not a display for connecting to the Pi's video output, but rather the UAR… https://37.220.31.213/blog/raspberry-pi-touch-screen-lcd/

Raspberry Pi on the Run

Adding a GPS Receiver to a Raspberry Pi
I thought it might be fun to turn my Raspberry Pi into a vehicle tracker. The nearest I got to building a truly bespoke tracker was in 2004 using a Siemens TC45 & later TC… https://37.220.31.213/blog/raspberry-pi-run/

Pi232 Raspberry Pi RS232 boards (For Sale)

Limited supply of my Pi232 Raspberry Pi RS232 boards for sale.
I have a limited supply of my Pi232 Raspberry Pi RS232 boards for sale. I manufactured these for my own projects (see my blog posts), but have more than I need. They … https://37.220.31.213/blog/pi232-raspberry-pi-rs232-boards/

Raspberry Pi arrives, RS232 board works!

In a previous blog, I reported that I had designed and manufactured some Printed Circuit Boards that would provide RS232 for the Rasberry Pi. The difficulty was I had no … https://37.220.31.213/blog/raspberry-pi-arrives-rs232-board-works/

GPS Tracking & the Raspberry Pi RS232

Using a Raspberry Pi for remote diagnostics.
Back in the mid 90's I worked on a project with the UK mapping company AtoZ. Commercial GPS tracking was in it's infancy then, and I had some Mobitex GPS trackers that needed a ma… https://37.220.31.213/blog/gps-tracking-raspberry-pi-rs232/

Raspberry Pi

Small low lost PC the size of a credit card.
I got up early on the day of the launch of the Raspberry Pi. I have been looking for a device like this for a long time. Before the age of 10, I was dabbling with electronics, and… https://37.220.31.213/blog/raspberry-pi/