DIY alarm circuit. Part 1.
![Top level schematic sheet](https://shadyelectronics.com/wp-content/uploads/2023/05/Top-level-schematic-sheet.png)
Do you hate it when someone steals from you? Personally, I find it rather irritating. However, there have been instances of thieves visiting our apartment building’s underground garage. And thieves do what they do, so things go missing from storage…