3 Questions want to ask about photocoupler.
Is attached schematic correct, or is it a correct usage??
I want to control a 12V FAN via photocoupler.
The FAN is 12V 0.6A.
Is there any others photocoupler to replace NEC PS2501?
Could I revert the usage?? Means I am usage 12V MCU to control a 5V 1A FAN??
[22 May revised]
How about using ULN2803A instead of photocoupler?
ULN2803A Key highlight:
- 500-mA-Rated Collector Current (Single Output, sugguest: 300mA @ Page 11, Table 1);
- GPIO: 5V
- Control: 12V DC FAN
Question for ULN2803A:
- Is it I need use 2 Channels (1B + 2B & 1C + 2C) for my 600 mA DC FAN?
- Could I connect 1B & 2B to Arduino UNO D2, D3 directly, no need any resistor?
- Could I connect 1C & 2C to DC 12V FAN directly, no need any diode?