Lab01: Using a Transistor to Control High Current Loads with an Arduino

Notes:

1. Relays, transistors basically do the same thing: Switch.
2. Relays uses magnetics to control switch. there’re two circuits.
3. Transistors are faster.

Cautions:

• [ ] The polarity of diodes;
• [ ] µF=microFarad
• [ ] motor driver has to be soldered

IMG_9093.mov

Lab: DC Motor Control Using an H-Bridge

Question:

1. how to understand “H-bridge”?
2. why, in some conditions, the motor switches fast and unobvious, while some has a clear “deceleration-acceleration”process?

IMG_9098.mov