The complete circuit diagram of the motor control is shown in Figure 1. The schematic includes all components for unidirectional as well as bidirectional use. The desired version is chosen before building the circuit. Your choice therefore determines the components used. The circuit has been kept as compact as possible. The result: a motor control weighing less than 25grammes.
Resistors:
R1 = 4kOhm, SMD
R2 = 100Ohm, SMD
R3 = 470Ohm, SMD
R4,R6 = 100kOhm, SMD
R5 = 10Ohm SMD
R7 = NTC, 100kOhm
R8 = 1kOhm, SMD
R9 = 10kOhm, SMD
Capacitors:
C1,C2 = 15pF, SMD
C3,C5 = 100nF, SMD
C4 = 10nF, SMD
C6 = 47µF 10V SMD
Semiconductors:
D1 = LL4148*
D2 = MBR2045CT*
T1 = BC517
T2,T3,T4 = BUZ11
T5 = IRF9530
IC1 = PIC16C84 (order code 966510-1)
IC2 = L4940V5
IC3 = PC827
Miscellaneous:
K1 = 10-way pinheader
X1 = 4MHz quartz crystal
Printed circuit board and programmed PIC (IC1): set order code 960095-C
PIC also available separately: order code 966510-1
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