2 1 J3 1 2 3 4 47 2.2uF 250V R15 10V Z1 GND 2K R31 5V 10K R32 D2 2K R29 R28 22K D3 R27 200K 10K R33 C7 47nF ZC J1 2 3 4 3 2 1 - + 5V U3A LM393 1 5V 4 swim R30 10 R24 10K DEBUG GND 3 C4 1 470F 10V 2 in NC 5 6 7 8 VFB PB1 5V GND R19 47K 5V L7805ACD13 NC gnd gnd gnd gnd out U2 POWER SUPPLY 1N4148 D1 100K 100K TACHOM ETER INTERFACE 115VAC P2 C2 R8 R7 4 DNI DNI PB2 DNI LED4 C5 0.22uF LED1 5V 1 GND TP2 TX PB3 PB2 PB1 PB3 DNI 9 8 7 6 5 4 3 2 1 PB2 PB1 2.2K pc6 pc7 swim ain3 ain4 pa3 Vdd Vcap Vss pb5 pb4 pc3 ain2 oscout pc5 oscin nrst rx tx pd4 R12 1 2 J4 PB3 2 1 100 R21 R23 2.2K R26 11 U4 2.2K 12 13 14 2.2K 8 + 4 - 5V 7 U1B gate swim 39K 39K 5V LED5 DNI LED3 DNI 5V ZC VFB 5V 3 2 MOTOR 8 GND + 4 - 5V 1 U1A R1 1K DNI 10 R4 VFB GND 8 + 4 - U3B 7 TX GND J2 2 1 COMMUNICATIONS 5 6 5V VOLTAGE SENSING R9 2K R3 39K R10 2K R6 R2 39K R5 LED2 Red LED 5K R17 5 100 15 R22 16 17 18 19 R20 1K 20 R16 0.01 6 22K R11 CURRENT SENSIN G Q1 T1635T R13 STM8S103F3P6 MOV R25 10 GND 5V C6 R18 2.2K R14 100K 0.22uF 1 TP1 C3 220uF 10V gate C1 0.22uF P1 MOTOR CONNECTION Figure 1. 8 STEVAL-IHM041V1 Schematic diagram Schematic diagram AM12468v1