1.0 KiB
1.0 KiB
Vacuum Tweezer
Replacement board for a Quick 381A. Old board died and I wanted to add some features anyway.
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)