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+## Vacuum Tweezer
+Replacement board for a Quick 381A. Old board died and I wanted to add some features anyway.
+![](4096-2304-max.jpg)
+
+#### TODO (for better matching with existing mating parts):
+* hole pattern needs to be ~5mm wider
+* change connector for footswitch to a 2.54mm one
+* change ac input connector to 3.81 one
+* change potentiometer connector from 3pin to 2pin with added internal 270k pullup
+* optimize PWM duty cycle range
+* code is very qnd, but quite usable
+
+#### Connections:
+* mains input to transformer primary; cut wires and connect with WAGOs. 
+* transformer secondary to ac input of pcb
+* pump and valve to respective output terminals (cut wires and connect to screw terminals or change pcb to use original 3.81mm connector)
+* footswitch
+* led (connect to one of the led outputs, power or software controlled led)
+* PE lead from the motor to the chassis
+* optional: add a mode switch to the frontpanel and connect it with three wires to the remaining switch input connector (can be used to select inverted footswitch mode)
+
+