This generation of interface supports the standard six motor channels, and can also be upgraded to support six input (feedback) sensors by adding IC5 (74LS366) along with the reed-switches was a chargeable extra.
Photographs show Issue 4 boards with a 1981 copyright:
View from Above |
View from Below |
Also labelled: C.R. 611 |
Single Interface Driver Board Components
R1 1K0
R2 10K
R3 - 8 2K2 RESISTER NETWORK
R9 1K8
R10 1K8
R11 1K8
R12 15K
R13 10K
R14 18ohm 5w
R15-R20 1K0
Capacitors
C1 100p polystyrene
C2 1.0vf Tant
C3 - C15 10nf ceramic
Semiconductors
IC1 74LS 125
IC2 74LS 125
IC3 74LS 04
IC4 74LS 123
IC5 74LS 366
IC6 74LS 138
IC7 - IC12 74LS 175
IC13 - IC16 ULN2003A
IC17 UA 7805