Peter's Homepage

Open-B5: An Expansion for the R&S UPL Audio Analyzer

Wed, 18 Mar 2026 19:28:52 +0200

This article outlines the development of an expansion card for the R&S UPL Audio Analyzer. It is supposed to give this beast an option to listen in on what the analyzer receives.

Electronic Door Access Control

Sat, 28 Feb 2026 17:28:52 +0200

Here is the setup of an electronic door access control system for clubs and also private use.

Semi-autonomous DC power supply

Sat, 08 Oct 2022 11:37:32 +0200

In the following a photovoltaic based DC power supply for various small small consumers in the house.

Among other things, this system also supplies the PiRack.

System in operation

Fumis/Austroflamm with OpenHAB

Sun, 25 Sep 2022 20:51:00 +0200

Here the integration of an Austroflamm pellet stove with a Control unit from Fumis/ATech into an OpenHAB instance is described.

Telephone for glider tow winches

Fri, 25 Feb 2022 21:00:52 +0200

A view of the winch operators panel A special phone for the winch operator on glider airfields is presented here. In contrast to most other projects on this site, it is a completely made up from in analog electronics. It aims to provide more comfort to the the winch operator during launch communication using a headset compared to a conventional telephone receiver. Which needs to be held to the ear using the shoulder, as operation of a winch often needs both operators hands at certain stages of the towing sequence.

Headset adapter from aviation to telephony

Mon, 14 Jun 2021 21:48:52 +0200

Linear drive for a child's bed

Mon, 17 May 2021 19:30:52 +0200

We will take a look on a electromechanically driven children’s bed which should help children find their sleep.

The finished bed

Talking keyboard

Sat, 09 Jan 2021 23:07:52 +0200

This website outlines a modification of an old PC keyboard to become a toddlers learning toy.

Automated extractor/range hood

Tue, 29 Dec 2020 23:07:52 +0200

This website shows the development of a circuit switching a kitchen extraction/range hood automatically on demand

Raspberry PIs in a subrack

Sat, 23 May 2020 19:24:32 +0200

On this page a modular system for the (halfway) neat construction of several Rasperry PI computers including mass storage and power supply.

The whole setup is powered using a semi-autonomous photovolatic DC power supply.

System in use

Bed with a scale

Sun, 10 Sep 2017 16:55:00 +0200

This web site shows the progress of integrating a digital scale into a bed frame. This is only a hobbyist project and as such cannot be compared with commercial offerings.

LIDAR Altimeter

Tue, 29 Aug 2017 16:55:00 +0200

This website portrays the development of a LIDAR altimeter based voice assistant for LSA/Microlight plane use (my own "Barking Bob").
Note: This is currently a work in progress, so stay tuned.