Voltage

S1

S2

S3

S4

S5

S6

S7

S8

4Vdc

On

Off

Off

On

On

Off

Off

On

3Vdc

On

On

Off

Off

On

Off

Off

On

2Vdc

Off

On

On

Off

On

Off

Off

On

1Vdc

On

Off

Off

On

On

On

Off

Off

−1Vdc

Off

On

On

Off

Off

Off

On

On

−2Vdc

On

Off

Off

On

Off

On

On

Off

−3Vdc

Off

Off

On

On

Off

On

On

Off

−4Vdc

Off

On

On

Off

Off

On

On

Off