Hi, I am designing a really simple circuit to switch a relay using a uController, and I was wondering if anyone could tell me if there is anything wrong with the design I've attached?
All the designs I've seen on the web, which use an NPN transistor as a switch, have the emitter connected to ground with the load "above" the transistor, meaning that a resistor is necessary between the uC and the transistor's base.
Are there any advantages in that configuration, or can I use the attached design instead and use less components? (in the design, the uC is powered from the same 5V source as the relay coil)
All the designs I've seen on the web, which use an NPN transistor as a switch, have the emitter connected to ground with the load "above" the transistor, meaning that a resistor is necessary between the uC and the transistor's base.
Are there any advantages in that configuration, or can I use the attached design instead and use less components? (in the design, the uC is powered from the same 5V source as the relay coil)
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