Stock photo of two big fans, from

Let Domoticz Tell You when Your Bedroom has been Ventilated

Even though my instance of the Domoticz home automation system has been running for several years now, I only ever used its dashboard occasionally to check on the power consumption of my electrical appliances. The recent addition of a Z-Wave reed contact to my bedroom window, however, made it possible to notify me when the room needed ventilation. And when the window has been open for long enough.


Stock photo of a five-strike symbol, from

Reviving the HTML-Access Counter

In the early days of the WWW, any modest webpage had a counter showing how many visitors it had attracted so far. Not for tracking customer journeys or ad revenues, but rather just for fun.


Stock photo of a smartphone, from

A Handy Pushover Console Script

Several years ago, I had purchased a one-off licence to use the Pushover push notification service, so a home automation suite based on Domoticz could inform me of unexpected events. Digging a bit deeper into the API, I found that it can be readily used to notify me of (important) system events on Linux hosts.


Stock photo of an USB adapter, from

Cheap USB-C to micro USB Cables: Are they any good?

On the search for a simple way to flash microcontroller development boards from hosts with USB-C ports only, I came across an adapter cable that sold for less than a dollar. Would I recommend you getting one as well? No. Because the cable didn't work at all.


Stock photo of a blower control unit, from

Calibrating a GW Instek GPD-3303S lab power supply

I purchased a pre-owned GW Instek GPD-3303S three-channel power supply. Its output voltages were close enough to the true value, but the currents were off by a few percent. Locating the service manual on the web was not a big problem, but the instructions did not really line up with my unit. Click here to find out how I managed to tune its settings.


Photo of the display of a Hama PDF20 DAB+/FM receiver

Denoising the Hama PDR20 DAB+/FM receiver

Here's another episode of my quest for a decent DAB+ receiver, this time checking out a Hama PDR20. I was (and still am) quite impressed by the fact that it comes with a single piece of wire attached to a female SMB connector as its antenna, and still yields a fairly good signal strength. So what's the problem? Well the device features two 3.5mm output connectors, both of which are outputting a nasty noise signal. Here's how to tame the beast...