Electronic Fan

1
Electronic Fan

• 2004.3

2
Feature

• Speed select
• Low, middle, high
• 3 I/O ports control 3 SCRs to select the speed
• Mode select
• Normal / Natural mode

3

• Natural mode
• simulate the true wind , changing the speed
• Swing
• Timer
• Power on timer / Power off timer
• 1, 2, 4, 8 hours can be set

4

• Remote controller enable
• 46.8kHz modulate-demodulate IR
• Memorize the state
• Natural, speed, swing

5
Diagram of E-fan
L/M/H speed
Impeller motor
MCU ST62
Key
Swing motor
Speed,timer,etc
IR controller
Display
AC Source
Buzz
6
Benefit of this solution

• High performance of EMC
• Low cost
• No external crystal
• No 7805
• Few resistors and capacitors
• Easy to fit different requirements of customers

7
Schedule

• 2004.3 Complete all of the functions
• 2004.36 Test by customer