Parts List

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5Vdc
connector
12Vdc
connector
1-wire
presence
+5V
GND
I2C
6x IO
1x IO (interrupt; change state)
solenoid
drive
6 x IO
6x IO (1-wire)
Tablet slot Tablet slot
Tablet slot Tablet slot Tablet slot
Solenoid conn.
Tablet slot
6x IO
GND
Solenoid conn. Solenoid conn. Solenoid conn. Solenoid conn. Solenoid conn.
…
…
Expander 2
Pcf8575
(16-bit)
LEDs (6)
Dock PCB
…
A2 = VCC
connector to Processor module
LEDs
Address config
6x Over current
limit (each slot)
TPS2069
Expander 1
Pcf8575
(16-bit)
6x IO
LED driver
I2C
Illumination LEDs
A2 = GND
Address config
A1, A0