Build this, put it in an ideal location. Instant flashing security system warning light for your cars. I did, and everyone thinks I installed a security system. That is one cost effective car alarm.
This is a good little project for a beginner just learning how to assemble. I used this to simulate an auto alarm. Works great!
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28-12868 - Interval Timer Kit
Interval Timer Kit
For intermittent operation of circuits and equipment. Blinking light, video/photo single frame shooting, slide projector control, miniature models.
28-17734 - Raspberry Pi Interface Board
The Quick2Wire Interface Board gives you easy access to all the features on your Raspberry Pi’s expansion header with added protection of not creating a dead Pi
MCM Cat 57, Page 688
MCM Cat 56, Page 618
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Quick shipping, quality products and reasonable prices. I've redone most of my home with MCM products. Very pleased.