Hi all. I've made a dedicated PCB that should control auxiliary lights of my motorcycle. I use CANBUS information by MCP2515 module and using Arduino Nano digital output pins to directly control input pins of VNQ9080.
I assembled all elements on the PCB and tested the product by improvised wire connections to the connector holes. All worked as expected. I connected a connector ( a lot of curving copper wires to make it possible to install the device in a small plastic box) and installed all in the plastic box. I checked all connector points for eventual shorts with Fluke 179 ohmmeter. Everything looked well and I connected the product to my test wiring as before. What a disaster! My LED lights started blinking,... I found out that output pins delivered only about 3V instead of full battery voltage. I imagined that I have ruined the VNQ by applaying wrong voltage when tested with ohmmeter - Reverse Vcc is specified as 0.3V
I prepared the second one. Assembled and connected the connector (a lot of work with curving connecting wires and soldering manually). This time no ohmmeter test. I connected the device. All looked well but I finaly find out that one output was broken - there are about 10V all the time with input low.
Do you have any idea what could be the reason for such problems?
Regards, Stojan
