Velleman projects K2634 Assembly instructions - Manual (Page 5)

5
For use with a regular open collector output and a control voltage
of 9 to 15VDC :
Rx
: 820 (8 - 2 - 1 - B)
If your control voltage is higher, then a higher value
resistor must be used.
For 24Vdc :
Rx : 1K8 (1 - 8 - 2 - B)
1. Resistors
R...
Construction
R1 : 220 (2 - 2 - 1 - B)
R2 : 220 (2 - 2 - 1 - B)
R3 : 220 (2 - 2 - 1 - B)
R4 : 220 (2 - 2 - 1 - B)
R5 : 10K (1 - 0 - 3 - B)
R6 : 10K (1 - 0 - 3 - B)
R7 : 10K (1 - 0 - 3 - B)
R8 : 10K (1 - 0 - 3 - B)
R9 : 12K (1 - 2 - 3 - B)
R10 : 12K (1 - 2 - 3 - B)
R11 : 12K (1 - 2 - 3 - B)
R12 : 12K (1 - 2 - 3 - B)
IC1 : TIL111 or equivalent
IC2 : TIL111 or equivalent
IC3 : TIL111 or equivalent
IC4 : TIL111 or equivalent
Mind the position of the notch :
it should point to the Velleman
emblem.
2 . IC’s.
3. Transistors
T1 : BC547B
T2 : BC547B
T3 : BC547B
T4 : BC547B