Posts tagged: electronics

Quick recap: I’m building a DIY security alarm using a Raspberry Pi, hardwired PIR sensors, and MQTT integration with Home Assistant. Hello again — it seems to be close to a year since I last managed …

We have a Dakboard digital calendar in our kitchen — showing lots of house and temperature data. So naturally; it must show the actual outdoor temperature as well. To do this I used a Raspberry Pi 2, …

In November last year — I started building a DIY security alarm system, using a Raspberry Pi as the controller. My plan was to make a self-sustained system, using proper alarm hardware — like PIR …

We recently got balanced ventilation installed, and I have interfaced it with Home Assistant. However — the ventilation unit have three “special modes” that can not be enabled through the Modbus …

As the weather is warming up here in Norway — my kids have gotten their bikes out. To make it more fun, both for them and me, I figured I’d build a series of traffic signals that they could play with. …

My kids wanted traffic lights for their LEGO city, so first I had to build a traffic lights controller.

My twins and I both like LEGO, and LEDs. I figured I’d make some simple LED street lights that we could use to build a LEGO scenery.

I’m using Prometheus to monitor my home office and homelab, I figured it would be cool to have a stack light show the active warnings and alerts from Alertmanager. So I made a HAT (Hardware Attached …

I made a simple HAT (Hardware Attached on Top) for the Raspberry Pi to read multiple DS18B20 temperature sensors — it was surprisingly easy. I used the measured temperatures to control a fan using …

A kids alarm module, with buttons and lights. Powered by a Raspberry Pi Zero, connected to WiFi and MQTT.

My ATTEN 858D hot air gun suddenly began tripping the residual-current device in my home office. Let’s investigate! 👇

Mounting a few orange flickering LEDs in my mom's miniature elf house Christmas decoration.

Making a single relay controlled with WiFi MQTT from Home Assistant, using WeMos D1 mini board.

I'm letting my coworkers know my availability with this simple Arduino Uno project. Improved the previous design by adding bigger and brighter LEDs.

This SOS station toy used to make terrible sounds. But after a bit of work it doesn't, it only has LEDs now.

I'm sticking a LED-strip to the back of my TV to create bias lighting.

My boys like to be firemen, so their red walking car needed some blue emergency lights.

Installing some lights in Ikea kids play kitchen, using a cheap LED-strip from eBay.

Mounting new LED front and fog lights on my brother-in-laws RC car.

I'm letting my coworkers know my availability with this simple Arduino Uno project. Three LEDs that reflect my Lync status.

A quick introduction to the AVR microcontroller series with sample schematics of inputs, outputs, serial and some basic circuit drawing.

Temperature sensor with serial RS-485 interface. Two additional sensors can be connected using 3-pin headers on the circuit board. Uses an AVR ATmega8 microcontroller.

I rebuilt an existing interface module — to be a stand-alone temperature and humidity sensor, with serial RS-232 interface. Uses an AVR ATmega8 microcontroller.

I rebuilt an existing interface module — to be a stand-alone temperature and light sensor, with serial RS-232 interface and some signal LEDs. Uses an AVR ATmega8 microcontroller.

Portal alarm box unit, my main project on technical college.