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How to Run a Desktop CNC Mill
Homemade Anvil (from Rusty Railroadtrack)
Garden Fresh Salsa
Very simple and inspiring! I made it without taping. Just fold a sheet and cut only that hole which must not be taped. Nice! I'll show it to my children.
PVC Chicken Feeder
Automatic lighting box with a timer on battery
I think, reed with 2 normally open contacts will be simpler. There is no need to disconnect 500k resistor when 300 ohm is connected. So it's enough to connect capacitor and R1 constantly and only to connect R2 via just simple normally open reed.
Build your own 3d printer filament factory (Filament Extruder)