hey guys i am trying to control a 12v fan with my arduino uno. the supply that i am using is given in picture below. ac 230 v 50 hz to 12v. it is written strickly for indoor use only. now for controlling i need to have common reference so i need to connect the ground pin of my sanyo adapter to the gnd pin of my arduino uno. will it be safe to connect. i do not know it is regulated or unregulated supply. i am using transistor pn2222a. my circuit is absolutely correct do not question me about my circuit.
The photo is useless. It's taken from too far away. Take another up close and don't post it unless you can read the label.
i do not know it is regulated or unregulated supply. i am using transistor pn2222a. my circuit is absolutely correct do not question me about my circuit.
Obviously you have no electronics experience or you would know that if you want to know if it is regulated or not you just measure the voltage with a meter , WITH & WITHOUT a LOAD. If the voltage is approximately the SAME , WITH & WITHOUT LOAD, it would be safe to say it IS REGULATED. If, on the other hand, the DIFFERENCE in voltage WITH & WITHOUT load is significant, then you would have to conclude it is NOT REGULATED. Since you so sure about your circuit, why are you asking
now for controlling i need to have common reference so i need to connect the ground pin of my sanyo adapter to the gnd pin of my arduino uno. will it be safe to connect.
It's very hard to tell your statements from your questions.
now for controlling i need to have common reference so i need to connect the ground pin of my sanyo adapter to the gnd pin of my arduino uno
This is a statement.
will it be safe to connect
This is phrased like a question but there is no question mark ????
Please use question marks after your questions.
And yes, you need a common ground. I don't know why you need to ask that if you are so sure of your circuit.
there you go
reframing - should i connect the gnd of this adapter to my arduino ground pin or not? will it be safe?
now that i give you everything raschemmel you do not reply.
Did you measure the output voltage of the adaptor , with and without the fan connected ?
Do you know how to find out which pin on the adaptor is the GROUND , not GRID (have you been working with vacuum tubes?)
should i connect the gnd of this adapter to my arduino ground pin or not? will it be safe?
zacmackra:
. i am using transistor pn2222a. my circuit is absolutely correct do not question me about my circuit.
we are quote certain you know that the pins on the data sheet are BOTTOM view.... so they are opposite what they would be looking down.
and yes, it is safe to connect both grounds. you have to in order to create a reference.
if you absolutely cannot, then use an opto that will use the fan's power supply only on the fan side and the arduino power on the arduino only.
raschemmel please do not answer me with a question. Ofcourse i know the pins. All i wanted is an approval to connect the grounds which dave gave me. Thank you dave. My project is working fine.
raschemmel please do not answer me with a question. Of course i know the pins.
You don't have to get offended. It was just a question. We don't know what you know or don't know. You wouldn't believe what we have to deal with here . Isn't that true Dave ? Was my question out of line ? (the comment about GRID was a joke by the way..)
