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DIY PVC pump to save money on repairs

The science pros at TKOR create a DIY PVC pump to help save money on repairs. Trump dials Collins with 'profanity-laced rant' ...
Hackaday

Tired Of Burnt Fingers? Try PID Tuning The Hot Glue Gun

Hot glue guns are pretty simple beasts: there’s an on/off switch, a heating element, and a source of current, be it battery or wired. You turn it on, and the heater starts warming up; ...