Automatic shutdown 3D printer
This module will surely be used by anyone who prints regularly on a 3D printer. The printout is complete, but the printer is still on. […]
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 […]
“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 […]
Police flasher with transistors
The entire connection is realized by means of three astable flip-flops. The middle flip-flop controls the transistors T1 and T2. It controls on which side […]
LED light bulb
A power supply with a serial capacitor is used to power the LED. The current flowing through the LED is limited by the reactance of […]