A meter out of a tube tester with a hand-typed paper manual dated 1940. D3 created a new CPU USAGE panel for the meter in Inkscape. An Arduino micro-controller is driving a current source transistor for testing and interface.
Wednesday, December 8, 2010
Thursday, December 2, 2010
Latching Push Button Switch
D3 innovative modification of industrial push button switch with the addition of a solenoid to create a magnetic latch that opens when the button is pushed.
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