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