Hello !
I use a relay which works with 100mA according to the datasheet but, in practice, I measured 130mA.
The relay : G2RK-1
Datasheet : http://doc.chipfind.ru/pdf/omron/g2rk1.pdf
First question : Is this relay work well with 230Vac ?
As you can see, it works with a double coil. Therefore, the schematic I'm trying to achieve is half of the full schematic.
I want to increase intensity of a digital port to use this relay. I found this :
But I don't have 2N2369. How to found an equivalent ? For example, I have a BC547, does it work ?
That circuit is OK, although R3 is not needed. BC547 is only rated at 100mA so not really suitable fro driving your relay. BC337 would be OK. Don't forget to connect a flyback diode in parallel with the relay coil.
Q1: Look in the datasheet page 3 , under Rated Load, I see at least 2A @ 250Vac , so you can switch mains voltages (be carefull)
Q2: many transistors for your type of usage (LED switch) will be fine , BC547 , 2N2222
Make sure its a NPN
A 100k resistor in the base is fine.
Emittor connected to GND.
One note : For switching the LED like in your schematics the BC547 is fine, It can handle the current of the LED,
But if your want to switch a relay with this BC547 you have to watch out, a (NON)-Latching relay coil requires more than 100mA and the BC547 is only rated to 100mA.
It is unclear to me what the rated voltage of your relay is , when in doubt use a 2N2222 it can take 800mA,
You put the diode reversed biased across each coil you are driving. That is with the anode to the positive end of the coil and cathode to the negative end.