I'm interested in members experience with problems of reseting processors due the noise/interference.
I have a 20M2 performing a control function for a 18v Ni cad battery charger. The whole circuit operates from 12v DC and uses a 12/26v switching convertor (operating at 10's of KHz) to supply the charging voltage and a 78L05 to supply the processor.
I have installed additional 12v and 5v bypasses (100n and 100u) but the problem remains that when the processor turns the DC/DC convertor on via a relay it immediately resets.
I suspect that it is through the 5v power supply or less likely radiated directly between the convertor and processor pins. I haven't put a scope on it yet but have tied unused inputs to ground via 10k.
Any experiences would be appreciated.
I have a 20M2 performing a control function for a 18v Ni cad battery charger. The whole circuit operates from 12v DC and uses a 12/26v switching convertor (operating at 10's of KHz) to supply the charging voltage and a 78L05 to supply the processor.
I have installed additional 12v and 5v bypasses (100n and 100u) but the problem remains that when the processor turns the DC/DC convertor on via a relay it immediately resets.
I suspect that it is through the 5v power supply or less likely radiated directly between the convertor and processor pins. I haven't put a scope on it yet but have tied unused inputs to ground via 10k.
Any experiences would be appreciated.