R
Rich
- Jan 1, 1970
- 0
We've developed a Microcontroller System for automotive use with few
sensors and a solenoid valve control output via a Relay.
We've found these valves resets the microntroller used (ATmega128) when
opening or closing and partially solve the problem with a diode in
parallel of the solenoid.
Moreover, in seldom cases the progam resets or loose it's variables
(counters) stored in eeprom.
Voltage regulation is based in a LM2574 switcher. We have not
implemented further filtering circuits and our housing is made of
aluminum.
In my understanding we need some EMI shielding, or power line filters
to avoid the reset problem.
Any advise is appreciated.
Rich
sensors and a solenoid valve control output via a Relay.
We've found these valves resets the microntroller used (ATmega128) when
opening or closing and partially solve the problem with a diode in
parallel of the solenoid.
Moreover, in seldom cases the progam resets or loose it's variables
(counters) stored in eeprom.
Voltage regulation is based in a LM2574 switcher. We have not
implemented further filtering circuits and our housing is made of
aluminum.
In my understanding we need some EMI shielding, or power line filters
to avoid the reset problem.
Any advise is appreciated.
Rich