KyungHee Univ. 2-0 Chapter 8 Parallel Port Interfaces

KyungHee Univ Transistors Used for Computer-Controlled Current Switches  전류 제어 Switch(BJT)

KyungHee Univ Transistors Used for Computer-Controlled Current Switches

KyungHee Univ Transistors Used for Computer-Controlled Current Switches

KyungHee Univ Computer-Controlled Relays, Solenoids, and DC Motors Introduction to Relays

KyungHee Univ Introduction to Relays  제어 회로와 다른 전원으로 구동하는 Relay 의 예

KyungHee Univ Introduction to Relays

KyungHee Univ Electromagnetic Relays Basics

KyungHee Univ Electromagnetic Relays Basics

KyungHee Univ Electromagnetic Relays Basics

KyungHee Univ reed Relays

KyungHee Univ Solenoids

KyungHee Univ Solenoids

KyungHee Univ Pulse-Width Modulated DC Motors  DC 모터의 속도 제어 ( 모터에 가해지는 실효 전력을 제어 함 ) 를 위하여 펄스 폭 변조 기술을 사용 한다.

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors DiodeMaximum voltage (V) 1N N N N N N N N Table 8.12 Maximum voltage parameter for typical snubber diodes

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ Interfacing EM Relays, Solenoids, and DC Motors

KyungHee Univ. DC Motor and Stepper Controller Current Motor Supply Logic Current Sensing Voltage Enable Supply Enable Sensing A Out Out Vs In A In GND Vs In B In Out Out B GND Dir1 En1 Dir2 En2 Vcc In Put Control Signal Connector +Vout 1 Motor 1 -Vout1 +Vout 2 Motor 2 -Vout2 Vs Supply Voltage GND uF 35V Vs 2W06 L298N Vs Supply Voltage GND

Dual Full-Bridge Driver L298 High voltage : 46V high current : 4A Dual full-bridge driver Accept standard TTL logic levels Drive inductive loads such as Relays, Solenoids, DC and, Stepping motors KyungHee Univ. 2-27

L289 Block Diagram KyungHee Univ M M

KyungHee Univ Solid-State Relays

KyungHee Univ Solid-State Relays

KyungHee Univ Solid-State Relays

KyungHee Univ Stepper Motors

KyungHee Univ Stepper Motors Example

KyungHee Univ Stepper Motors Example PORTB Output AA’A’BB’B’ 10ActivateDeactivateActivateDeactivate 9ActivateDeactivate Activate 5DeactivateActivateDeactivateActivate 6DeactivateActivate Deactivate Table 8.13 Stepper motor sequence

KyungHee Univ Stepper Motors Example

KyungHee Univ Program A double circular linked list used to control the stepper motor. // 6811 or 6812 const struct State{ unsigned char Out; // Output const struct State *Next[2]; // CW/CCW }; typedef struct State StateType; typedef StateType *StatePtr; #define clockwise 0 // Next index #define counterclockwise 1 // Next index StateType fsm[4]={ {10,{&fsm[1],&fsm[3]}}, { 9,{&fsm[2],&fsm[0]}}, { 5,{&fsm[3],&fsm[1]}}, { 6,{&fsm[0],&fsm[2]}} }; unsigned char Pos; // between 0 and 199 StatePtr Pt; // Current State

KyungHee Univ Program Helper functions used to control the stepper motor. // 6811 or 6812 // Move 1.8 degrees clockwise void CW(void){ Pt = Pt->Next[clockwise]; // circular PORTB = Pt->Out; // step motor if(Pos==199){ // shaft angle Pos = 0; // reset } else{ Pos++; // CW } // Move 1.8 degrees counterclockwise void CCW(void){ Pt = Pt->Next[counterclockwise PORTB = Pt->Out; // step motor if(Pos==0){ // shaft angle Pos = 199; // reset } else{ Pos--; // CCW } // Initialize Stepper interface void Init(void){ Pos = 0; Pt = &fsm[0]; DDRB = 0xFF; // 6812 only }

KyungHee Univ Program High-level function to control the stepper motor. // 6811 or 6812 void Seek(unsigned char desired){ short CWsteps; if((CWsteps=desired-Pos)<0){ CWsteps+=200; } // CW steps is 0 to 199 if(CWsteps>100){ while(desired<>Pos){ CCW(); } else{ while(desired<>Pos){ CW(); }

KyungHee Univ Basic Operation

KyungHee Univ Basic Operation

KyungHee Univ Basic Operation

KyungHee Univ Basic Operation

KyungHee Univ Basic Operation

KyungHee Univ Basic Operation

KyungHee Univ Basic Operation

KyungHee Univ Basic Operation

KyungHee Univ Stepper Motor Hardware Interface

KyungHee Univ Stepper Motor Hardware Interface

KyungHee Univ Stepper Motor Hardware Interface

KyungHee Univ Stepper Motor Hardware Interface

KyungHee Univ Stepper Motor Shaft Encoder

KyungHee Univ Stepper Motor Shaft Encoder

KyungHee Univ Stepper Motor Shaft Encoder

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KyungHee Univ. 2-56

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