Today I watched How much current can a 9V battery supply? Let’s test it! over on YouTube.
Monthly Archives: August 2021
Entity Relationship Diagrams
Today I was reading about Entity Relationship Diagrams in Lucidchart. They have some notes on Entity-Relationship Diagram Symbols and Notation with their ER diagram tool.
Full set! 1,283 projects to do…
I think this is just so super duper cool:
- Maxitronix 500 in 1 Electronics Lab
- Maxitronix 300 in 1 Electronics Lab
- Maxitronix 200 in 1 Electronics Lab
- Maxitronix 130 in 1 Electronics Lab
- Maxitronix 60 in 1 Electronics Lab
- Maxitronix 30 in 1 Electronics Lab
- Maxitronix 10 in 1 Electronics Lab
- Maxitronix AM/FM Radio Kit
- Maxitronix Crystal Radio Kit
- Maxitronix Metal Detector
- Maxitronix Digital Recording Lab
I call these, variously, 500in1, 300in1, 200in1, 130in1, 60in1, 30in1, and 10in1. Or, collectively, Xin1.
systemd-tmpfiles
Today I learned about systemd-tmpfiles which can be configured with files in /etc/tmpfiles.d.
What Does “VCC” Stand For?
So today via What Does “VCC” Stand For? I learned that VCC stands for “voltage at the common collector”.
HC and LS logic families
So today I learned that “HC” (high speed CMOS) and “LS” (low power Schottky) are two different types of logic family.
Coupling and Decoupling
Today I read a little about Coupling and Decoupling. Apparently 0.1uF ceramic cap across VCC and Ground pins on a IC will do it.
Installing Zabbix from source
So I’ve had a bit of a go at installing Zabbix from source. I think I got there in the end, but I’m not sure how to auto-start the service… yet.
Public APIs
This via r/programming today: A collective list of free APIs for use in software and web development.
Favourite papers
So there’s a list of interesting papers over here: My favorite papers. I didn’t have time to read them all so I picked The Ubiquitous B-Tree and just read that.