Smiley on an MAX7219 8x8 LED matrix connected to NodeMCU dev kit 1.0

NodeMCU with MAX7219 8×8 LED matrix display

Since the awesome devsaurus recently fixed important SPI issues (#50 is from Christmas 2014!) in NodeMCU it’s now possible to run MAX7219 8×8 LED matrix displays with an ESP8266 and the NodeMCU firmware. Constraint: at the time of this writing (2015-20-22) SPI for MAX7219 works fine only with current NodeMCU dev and dev140 branches! Connect NodeMCU with MAX7219 display According to the pin layout for […]

How does Docker generate default container names?

Today I was wondering about Docker default container names. They’re cool enough to have caught my attention during the first hour of playing with Docker. furious_heisenberg, agitated_darwin, romantic_curie… who would come up with something like that? Docker default container names When you create a new Docker container and don’t give a custom name (by passing –name […]

Is the iPad dead yet?

Is the iPad dead yet? Is Apple going to stop iPad production anytime soon? One might be inclined to think so looking at following picture from Apple. On June 9th I got an email from Apple about updates to the iOS Developer Program. It featured the above picture which immediately caught my attention because it misses an […]

MAGZET: Magsafe for the audio port

MAGZET: Magsafe for the audio port

Sadly, there’s no Magsafe on the new MacBook. But there can be… on any device you own, thanks to MAGZET. This add-on to your current audio port relies on magnets to snap your headphone cable into the port, protecting your ears, your ‘phones, and your device from potential ruin. It’s also designed for modern gadgets, […]

Apache Derby logo

Why not to use Apache Derby

Here’s why you shouldn’t use Apache Derby: its developers and maintainers follow some really borked ideals and don’t truly care about open-source software. Derby may or may not be a good database – I can’t really tell (and I don’t care either). What p*** me off is the developers’ disregard for the open-source community. Let […]