How can I protect control boards from over DC voltage
Can I use something like this DORK buck ? I am thinking in the event if my converter fails and voltage goes high of I don't isolate batteries before I equalize them.
Forum Discussion
It has been a LONG time since I saw the article but basically it was a Progressive Industries "Surge Guard" for DC.. I can describe the cirtuit, or rather it's elements, but I can not build it from memory
You have two voltage comparators(SP?) these are devices which compare the voltage on the "Sense" lead to a standard (usualy 5 volts) on board. They output HIGHER or LOWER (1 or zero depending on the input voltage
One is set to like 11 or 12 volts (low voltage cut off, in your case this one is optional) the other is set to like 15 (high voltage cut off.
The output of these drive a RELAY.. Since one should be high and one low when the voltage is right the relay pulls in and power is sent on to the loads.
If the voltage goes HIGH or LOW then both of them will have "Same State" this results in the voltage across the relay coil being zero (EIthe 12 and 12 relative to ground or 0/0 but either way ZERO refernce to the other terminal)
Any decent electronics technician can make such a device.
You have two voltage comparators(SP?) these are devices which compare the voltage on the "Sense" lead to a standard (usualy 5 volts) on board. They output HIGHER or LOWER (1 or zero depending on the input voltage
One is set to like 11 or 12 volts (low voltage cut off, in your case this one is optional) the other is set to like 15 (high voltage cut off.
The output of these drive a RELAY.. Since one should be high and one low when the voltage is right the relay pulls in and power is sent on to the loads.
If the voltage goes HIGH or LOW then both of them will have "Same State" this results in the voltage across the relay coil being zero (EIthe 12 and 12 relative to ground or 0/0 but either way ZERO refernce to the other terminal)
Any decent electronics technician can make such a device.
