Hi guys!
I'm in litlle cnc project and have trouble with relay.
Relay controls laser and fan,and my question is can i put regular electromagnet relay instead of reed?
Here is sheme and relay
And this is what i want to put instead of reed,only my is not DC,I think,it's not written,but it looks the same,6 V
This is my first arduino project,so I'm not sure if arduino can supply enough electriciti.
I test relay with 3 x 1,2V AAA battery and it works normally,+/- doesn't matter,it works in both ways.
So,can I replace reed with this electromagnetic relay,and if i can,do i need make some other changes in circuit or not?
Without knowing how the reed-relay is driven I can't tell if that circuit will handle
a larger relay - there needs to be enough current handling and the right voltage
for the relay coil.
Well the 2N2222 will drive upto 0.5A, so your circuit will handle most 5V powered
relays except for really large ones that take > 0.5A. Make sure the free-wheel
diode can also handle the current level as a peak rating.
I put everything together and now I have a problem,when I connect VIN,GND & 5V,relay is on,D12 dosen't matter,on/off,pluged or unpluged,relay is on.
Do you have any idea?
2 and 6 are your coil. looks like you have then on the Vcc line and the comm and NO of the relay on the Vin.
I do not see any pin controlling the coil. unless the Laser2 is ground. The emitter of the PN2222 goes to laser2
the collector comes from the coil and the base is controlled by a 2.2k resistor.
please read the data sheet. I am not sure you can drive the relay from the arduino power supply out of the 5v pin.
the relay contacts are passing power from Vin out to the laser and fan and what not.
it does not seem you have powered things from a power supply, but rather from the arduino. this is not the safest way to do this.