Unofficial BB Walker YouTube fan site.
BB Walker TV is channel where you can find tech movies, vblog and music gear stuff, mostly Yamaha keyboard and quite more other quality content videos and tutorials.
VCC Pin goes directly to VCC from Rapsberry (Green Wire)
GND goes direclty to GND from Rapsberry (Black Wire)
IN1 goes to the at the junction of first diode (1N4148 ) and resistor (4,7 kOhm) (White Wire)