Hi, I hope someone can offer me some advice please.
I have a project ongoing for the car which uses the CHI035A high power board. It is driven by 12v and has the 78L05 regulator fitted (and link removed) and also has the L293D motor driver IC fitted to drive a motor in either direction.
Everything is working well except for one thing. I am using FET output B.0 to provide 12v power to a reversing camera but unfortunately it is not working as I had hoped because the output is connected between B.0 and V2+ and NOT referenced to GND. Therefore when the camera is off then there is 12v on both the supply wires going to the camera instead of both being 0v which is causing issues elswhere in the system.
I have temporarily got around the issue by using a miniature relay to switch 12v & GND to the camera and using the B.0 & V2+ to switch the relay on/off. This is working well and has solved the issue but is not a particular elegant solution especially as the relay is just connected to some flying leads and not on a circuit board.
Can anyone suggest a better solution to use the B.0 output to switch 12v (referenced to GND) instead of the relay.
Many thanks
Russell Spearing
I have a project ongoing for the car which uses the CHI035A high power board. It is driven by 12v and has the 78L05 regulator fitted (and link removed) and also has the L293D motor driver IC fitted to drive a motor in either direction.
Everything is working well except for one thing. I am using FET output B.0 to provide 12v power to a reversing camera but unfortunately it is not working as I had hoped because the output is connected between B.0 and V2+ and NOT referenced to GND. Therefore when the camera is off then there is 12v on both the supply wires going to the camera instead of both being 0v which is causing issues elswhere in the system.
I have temporarily got around the issue by using a miniature relay to switch 12v & GND to the camera and using the B.0 & V2+ to switch the relay on/off. This is working well and has solved the issue but is not a particular elegant solution especially as the relay is just connected to some flying leads and not on a circuit board.
Can anyone suggest a better solution to use the B.0 output to switch 12v (referenced to GND) instead of the relay.
Many thanks
Russell Spearing