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How to make simple and easy to use photography backdrop clips for under $0.05 each

How to add a 12 volt car accessory plug to your battery charger

DIY adapter to run 9 – 18 volt cordless power tools off a car battery, power Supply or charger

How to control a relay with a PIR motion sensor

tape measure fox hunting beam antenna for HAM radio.

simple ham radio mic preamp for a HT.

Simple FOX hunting HT Attenuator.