I have this shematic. With one electrical Pump and two solenoid valves I want to control via the arduino.
Here are the specs for the parts:
- Pump: 12V max. 250mA
- Valve 1: 12V max. 160mA
- Valve 2: 12V max 220mA
- Source: 12V max 2A
My questions is:
Are the 4.7k resistors enough? Do I need different resistors for the different consumers? And I am using S8050 as transistors. Are they to small for the load? And where do I have to connect the ground of the arduino to?