Q1 / Q2 = KSP2222ABU NPN Transistor, 600 mA, 40 V, 3-Pin TO-92
R1 / R2 = 470 ohm
J5 connected to Solenoid 1 both are the same specification.
J6 connected to solenoid 2 rated at 12v <160ma 3W
Pwr is 12v from bench top power supply
R1 is connected to GPIO Pin on RPI Zero
R2 is connected to GPIO Pin on RPI Zero
Orange wiring is on bottom Layer
Yellow wiring top Layer
D1 / D5 are diodes
J6 operates without any problem.
J5 does not operate at all?
I've cross checked the solenoids, no issue,
I've changed the GPIO pin no issue.
I cannot figure out why this circuit would not allow J5 to operate the solenoid, and J6 operate without fail each time
The solenoids are not run concurrently, they are only required 1 at a time.
I cannot find the root cause of the problem here, any help or guidance would be gratefully accepted. Please excuse my poor electronics skills, my background is in mech. Eng. and I'm not on the Arduino train.
Could the issue be the circuit wiring layout or diodes used or other?