each 23017 port A output to ULN2803, first one 23017
port B for 8 switch input,
second one 23017 port B for normal output with 8 LED.
with 3.5mm block terminal 9pin output, can plug in our
2803 relay board
with
two Step motor connector (5V,D0,D1,D2,D3)
(5V,D4,D5,D6,D7)
can use Step motor (28BYJ-48 5VDC) with 4 5V motor
output port
Spec Detail
1. U13 U14 I2C
23017x2 32 GPIO
23017 Datasheet
2. J16
Mini USB 5V input & J25 for GPIO power output
with Ployswitch Fuse protect.
3. S1, S2,S3,S4 4 SMD Switch input
4. S5 4 DIP
Switch input
5, U5,U15
ULN2803
6, J21data ,J23 Vcc ,J24
GND 4 x motor output
7. J18 for RS-Pi V2 GPIO connector
(got 4 more GPIO pin)
