Hi, I have a relay jqc-3f, for example, I need to using Arduino, enable or disable the propeller to operate from AC 220V.
I know that there are relay control modules, like DFRobot, but because of their high cost, would not like to use them because of the limited resource of the relay.
Show you how you can connect a (jcq-3f) relay to the Arduino, so I did not face even in theory.
Thank you in advance!
It is clear that there is a version with two networks, one from Arduino, 5V, 12V other for relay control, and which operate using 12V transistor ...
It's just not very convenient, because will have to make separate meals ... I would like everything to work on one power supply.
I have read that if Arduino submit 12V, and they will be available at the outlet, do not want to burn the card check this out ...
P.S.: I apologize for my English.
No, don't apologise, but if you want sensible answers, post a Web link to the thing you are talking about.
Ok,
Relay Jqc-3f: http://www.e-voron.dp.ua/files/pdf/relay/JQC-3F(T73).pdf
I think in the rest of the links it makes no sense to throw mostly a question about the above relay. Link up manifnst of the relay.
OK, so that is a series of relays available in different coil voltages, notably 5 V and 12 V. The 5 V relay would require 80 mA to operate, while the 12 V would require 30 mA.
Well, 80 mA is far too much for an Arduino pin to source (20 mA practical maximum) and 12 V is too much for it to switch in any case.
You need a general-purpose NPN transistor with its emitter to ground, it collector switching one side of the relay coil with the other side going to whatever voltage you need to power it, and the base supplied from an Arduino pin via a 470 Ohm resistor. You also need a diode across the relay coil, anode to the transistor collector and cathode to the supply.
Thank you very much for your reply, I will try to do so. Just need to find a relay with 5 volts.
Thank you, so clear, once again thank you for your help!