A Simple Transistor-Based Electronic Siren скачать в хорошем качестве

A Simple Transistor-Based Electronic Siren

This video shows how to build a transistor-based electronic siren that produces police, fire, and ambulance alarm effects. This circuit is designed as a simple replacement for the rare UM3561 siren IC, utilizing only standard transistors, through-hole type resistors, and capacitors. We also designed a dedicated PCB for this project, which was sponsored by PCBWay. You can grab the PCB files and order your own board directly from PCBWay’s project sharing space: https://www.pcbway.com/project/sharep... Full project details and schematic: https://jayakody2000lk.blogspot.com/2... Content of the video: 00:00 - Top and bottom sides of the PCB 00:08 - Soldering resistors 01:37 - Soldering 1N4148 diodes 01:58 - Soldering electrolytic capacitors 02:14 - Soldering Mylar capacitors 02:39 - Soldering transistors 02:57 - Soldering trimpot 03:03 - Soldering pin-headers 03:14 - Assembled PCB 03:34 - Connecting 9V DC power source 03:42 - Connecting 32Ω speaker 03:51 - Testing and adjusting the tone