Nicely rendered 7-segment numbers
User cbm80amiga has uploaded a nice library to render 7-segment numbers on graphical displays - especially for Arduinos. But the code can as well be used without any Arduino in…
Temperature measurements with an NTC thermistor
Following a discussion on Facebook I put here an online tool to calculate the output of a voltage divider consisting of a fixed resistor and an NTC thermistor following a first order Steinhart–Hart equation.
The calculations are based on a voltage divider where either the voltage over the NTC or over the pass resistor is measured. You can change the values in the script according to your own settings. If you break the script for some reason, just reload the page.
SageMath uses Python as programming language.
0.5 mm pitch FPC breakout board - soldered
Some Toner-Transfer PCB Highlights
Some recent highlights from my home-made circuit boards using the toner-transfer method. 0.5 mm FPC breakout board Yes, I have been told that I am crazy before... Designed in KiCAD…
Canvas: Using Python to create Calculated Questions
Background I just recently started with Canvas because Uppsala University has decided to use it as its upcoming LMS platform after a failed attempt with another product. Therefore I had…
A tiny watchdog
In a recent quick-and-dirty project with a Wemos D1 mini clone I had some problems with the reliability of the code. The ESP8266 contains two watchdogs which have the sole…
IKEA TRÅDFRI Zigbee module on a breadboard.
Hacking IKEA trådfri lighting automation
I recently visited IKEA again and got interested in their affordable line of home automation/LED lighting products called TRÅDFRI (meaing wireless in a play-with-words kind of Swedish). Of course there…
project update: a TTL/CMOS computer
Exactly one month later – our electronics course at Uppsala University just approaches its end – and I got the next shipment for my new project: 1.1 km of equipment wire.
twenty new breadboards
new project: a TTL/CMOS computer
Watching Ben Eater’s youtube series on his breadboard computer based on discrete logic chips inspired me to pursue my own construction. Apart from a lack of time I also needed some more breadboards, which arrived today.
