Can I use the high power NPN transistor and diode from the monitor? And if so, how do I drive them with the arduino.
How can I make sure I don't damage the arduino? I've read I don't have to connect the arduino ground to the solenoid power ground, but where do I connect it to?
I've seen optocouplers with MOSFETs in one package like PS7241E-1A (datasheet: www.tendaji.nl/PS7241E-1A_octo_mosfet.pdf), is that an option?
Right now the solenoids use 0.42 Ampere, can I do something to make that number grow?
I've put in a 7805 to get a constant 5 Volt, but without the capacitators, is that OK?
As you can see I've put in a question mark for the connection from the power supply(+) to the collector of the octocoupler. I'm guessing I need to make a voltage divider/resitor to get the voltage between 30 and 5volts so my 7805 will generate a constant 5 volts.
Why is R1 only 10 Ohm when I use the octocoupler and 2.2K without?
- The datasheet says it has a very low saturation voltage (3V), I'm trying to give it 5V, is that too much?
If the solenoids take 0.42A, how much current is going to the base of the transistor?
How do I influence that?
howmuch current does the base need to make the solenoids get 0.42A?
I've also made a table with solenoid information:Each solenoid says: max 28V and max 165mAProvided with 325V:#Solenoids in series Amps used Resitance1 1.63 1242 1.17 2453 0.75 382