Curl is a tool for internet communication and supports many protocols. Most important is probably HTTPS so a web server can be connected. If you read this article (what you obviously do) you know what you want to do with it. This article explains how to cross compile it for AmigaOS 3.Continue reading Building curl for amiga
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Battery Driven Wifi Temperature Sensor
Some notes how to build a sensor that can be driven by 3 AA rechargeable battries for up to 1 year.
The web is full of examples how to build a temperature sensor. I want a sensor that is connected to my Wifi, can be driven by batteries for months and has an adequate resolution and precision.
This leads me to the following parts:
- DHT 22
- 3 AA rechargeable batteries, should be ‘ready-to-use’ (see below why)
End-to-End Encrypted Messenger
You always thought that end-to-end encryption in your favorite messenger like WhatsApp is a big deal? Or is it even not supported? Well, here is an example showing how “new” this feature is and it works for 15 years now. Using a Unix system (macOS, Linux etc.) it is a one-liner to send encrypted messages using the commands nc and openssl.
Wifi for 8 bit computer
In this article I want to present the WiFi board I have developed for my Z80. It should be no problem to adapt it to different processors as I utilize a 16550 to connect the serial interface of the USR-WIFI232-T to the Z80 bus as you can see in the circuit.
Z80 work in progress
Meanwhile I have soldered most of the Z80 parts on some board connected by a bus board. I will describe the complete system running CP/M 2.2 in the upcoming posts, board by board. Continue reading Z80 work in progress
Reactivating Old Z80 Computer
I have found an old Z80 computer which was used in production in the 80’s. Specs seems to be a video card (or let’s say, a text card with video output), a Z80 MCU, 5,25″ floppy disk drive and a keyboard interface.
Howto time-controlled change the wallpaper and theme in Ubuntu 14.04
In this article I describe how to set up a time-controlled, automatic change of the wallpaper and the theme of Unity (GTK 3). I like to have a dark theme and wallpaper at night:
Continue reading Howto time-controlled change the wallpaper and theme in Ubuntu 14.04
Raspberry Pi’s GPIO Speed
We all know that the raspi is a small and neat device for controlling our LEDs but sometimes I miss the possibility to add hardware to a “real” bus like a real CPU has. Sure it is possible to imitate a bus what is called bit banging. This way you can control external hardware like LCDs or writing data to external SRAM faster than utilizing SPI. So we were interested how fast the Pi can really switch these pins.
Here is a webcam showing Horster Str. in Bottrop, Germany.
Investigating Bugs in twittAmiga
I’m currently investigating three bugs in twittAmiga: Continue reading Investigating Bugs in twittAmiga