chunyang

liuzhiying666 posted on 2018-8-16 14:01 The circuit was not designed by me, I just came here to solve the problem

Since I want to solve the problem, of course I have to correct the wrong design first.

liuzhiying666

topwon posted on 2018-8-17 14:20 You should first confirm where the problem is, and then think of a targeted solution. If ground separation can eliminate this interference, then at least there is a direction.

Yes, thank you

liuzhiying666

bigbat posted on 2018-8-17 10:12 This may be caused by the overall voltage distortion caused by the large current generated instantly. Test plan 1: First, disconnect the power supply of the entire system and supply it separately...

It is indeed possible. The instantaneous current of the car's flasher is more than 3A.

liuzhiying666

chunyang posted on 2018-8-19 19:45 Since we want to solve the problem, we must correct the wrong design first.

There is no other way. We just told them the problem and it is up to them to decide how to fix it. However, the effect is indeed much better after changing the optocoupler. It is not completely useless.