I have made a display for my caravan using LCD 200mV panel meters. There are 3 dislays showing caravan bat voltage car bat voltage and amps in or out of the caravan batery.
The A display uses a 1mOhm shunt.
Unfortunatly I have blown 2 panel meters for the A dislay. The shunt gives a perfect dislay on my multimeter (200mV scale) but it destroys the panel meter after a short time, particuarly on inital conection of the caravan batery.
I asume it is generating some sort term high voltages or current.
How can I filter this out ? Would a capacitor accross the caravan batery terminals or accross the shunt help ? what type of capacitor ? what sort of value?
I am a bit desprate as I have cut out holes for the meters and now I carn't get one to work.
Any advice would be appreciated
Cheers John
The A display uses a 1mOhm shunt.
Unfortunatly I have blown 2 panel meters for the A dislay. The shunt gives a perfect dislay on my multimeter (200mV scale) but it destroys the panel meter after a short time, particuarly on inital conection of the caravan batery.
I asume it is generating some sort term high voltages or current.
How can I filter this out ? Would a capacitor accross the caravan batery terminals or accross the shunt help ? what type of capacitor ? what sort of value?
I am a bit desprate as I have cut out holes for the meters and now I carn't get one to work.
Any advice would be appreciated
Cheers John