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The previous one I built had a lead acid battery with a removable 'screw in' back sealed with a neoprene "O" ring. Battery will be removed for...
I would use the Smoothieboard to update an existing CNC Mini mill with old and outdated electronics.
Robert Huxford published a new build: Long duration , high intensity SCUBA dive light using Li-Po 18650 batteries and advanced circuitry. Read...
Use a high intensity 7200 lumin LED and Li-Po batteries for and extended use dive light. Operational depth to 350 feet Pulsed frequency modulation...