Build A Portable Motion Detector Alarm

I use an off the shelf PIR sensor and a few other jellybean components to build a battery powered portable motion detector alarm.

Purchase links

PIR Sensor: https://defs.link/?u=c5a21c4 2N3904 NPN Transistor: https://defs.link/?u=f6da2f5 1K Resistor: https://defs.link/?u=495a101 Active Sounder: https://defs.link/?u=caac037 AA Battery Holder: https://defs.link/?u=0c7737a Toggle Switch: https://defs.link/?u=92078f3 Box (100x68x50): https://defs.link/?u=65364ee

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==================== My Electronics Tools (video and purchase links)

HP/Agilent/Keysight

3457A. 4261A: https://defs.link/?u=07ed95 5342A 18GHz: https://defs.link/?u=5f7513 6181B: https://defs.link/?u=b12aef 8012B: https://defs.link/?u=ca5764 8648B: https://defs.link/?u=da52a3 8901B: https://defs.link/?u=535835 DSOX1102G: https://defs.link/?u=a68d39 https://defs.link/?u=12d498 E3646A: https://defs.link/?u=128f4a

Marconi

2022D. 2955 ... https://www.youtube.com/watch?v=POzlMLa8x-U