0. ATMega128 I/O Power Control ( Solid State Switch, Relay)
KyungHee Univ.

1. Computer-Controlled Current Switches BJT Transistors
전류 제어 Switch(BJT)
NPN Transistor Model
PNP Transistor Model
KyungHee Univ.

2. 여러 가지 Relay 예
KyungHee Univ.

3. 8.5.1 Introduction to Relays
KyungHee Univ.

4. 여러 가지 제어소자의 사진 EM, Solid-state, Reed Relay
KyungHee Univ.

5. Electromagnetic Relays 의 구조
KyungHee Univ.

6. Electromagnetic Relays Basics
Relay의 구조에 따른 Activation Sequence
KyungHee Univ.

7. Reed Relay의 구조
KyungHee Univ.

8. Solenoid Relay의 구조
KyungHee Univ.

9. Solenoid Relay 사진
KyungHee Univ.

10. Interfacing EM Relays, Solenoids, and DC Motors
Current Sink 구조 예
Snubber diode
KyungHee Univ.

11. EM Relays와 Solenoids의 Interfacing 예
KyungHee Univ.

12. 단 방향 DC Motors Control 회로(High Current MOSFET) 예
KyungHee Univ.

13. Isolated 단 방향 DC Motors Control 회로 예
KyungHee Univ.

14. Isolated 단 방향 DC Motors Control 회로(High Current MOSFET) 예
KyungHee Univ.

15. Isolated 단 방향 DC Motors Control 회로(High Current MOSFET) 예
KyungHee Univ.

16. 양 방향 H-Bridge DC Motors Control 회로 예
KyungHee Univ.

17. Isolated 양 방향 H-Bridge DC Motors Control 회로 예
KyungHee Univ.

18. 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.

19. L289 Block Diagram M M
KyungHee Univ.

20. L298을 이용한 DC Motor and Stepper Controller
L298N
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 + -
470uF
35V
104 1 2 4 3
2W06 2
7414 1 4
7414 3 Vs
Supply
Voltage
GND
KyungHee Univ.

21. Solid-State Relay(Triac)
KyungHee Univ.

22. Stepper Motors
KyungHee Univ.

23. Stepper Motors Interfacing 예
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24. Stepper motor control sequence 예
PORTB
Output A A’ B B’ 10
Activate
Deactivate 9 5 6
KyungHee Univ.

25. Double Circular Linked List를 이용한 Stepper Motors 제어 Data Structure
KyungHee Univ.

26. L293 Driver를 이용한 Stepper Motor Interface 예
KyungHee Univ.