I'm pretty sure I understand how this needs to be done, but I want to make sure so I don't ruin my Arduino or anything else. I have a 120VAC geared motor that I want to be able to switch on and off using the Arduino. If I understand right, I'll need to use a relay. While relays that can be switched with 5V and less than 40mA and will switch 120VAC+ do exist, I don't have one...I have a relay that can be switched with 12V and will switch 120VAC+. What I believe I can do is use the Arduino and a transistor to switch a separate 12V source which will in turn switch the relay, which will power the motor.Am I understanding this right? The Arduino switches the transistor, allowing the 12V source to switch the relay, which will enable power to the motor. Do I need a special transistor? Right now I have some TN4403's, TN2907's and TN3906. I read that I need a TIP120, I can only assume it's because the ones I have won't handle 12V or something.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16