Bidirectional controller for model railway – V2
We present you a new version of the controller for model railways. About 5 years ago since the publication of this article, I was approached […]
„Soft start“ transformer
This circuit is used to eliminate current surges that have inductive loads such as motors and transformers after switching on. Soft start can be used, […]
Laboratory power supply 0-30V 0-3A
As one of the basic equipment of every craftsman is an adjustable laboratory source. There are many schemes on the Internet, but everyone has their […]
How to print PCB design
How to correctly print a PCB theme in the correct resolution, or how to determine its size. You are often asked how to print a […]
„Batest“ – 12V battery tester
The battery tester is used to check the voltage of a 12V lead-acid battery, eg the on-board voltage in a car. This connection is suitable […]