line foll o wer card
Assemble the pieces as shown in the picture and weld in
the bottom of the card.
2N2222
2N2222
Pay attention to the
notch placement
sensor card
line foll o wer and sensor cards
L2
L4
+
Q2
+
U4
+
Q1
L3
+
L1
Pay attention to the polarity of the diode;
the black streak should be always at left
R7
RV1
U3
R6
D1
9V DC V+
GND
E
D
A
E
E
A
D
E
5