Is there a way improve the LVC shutdown - RC-Monster Forums

Resistance (ohms): Enter the LVC internal resistance, 200,000 in this case.
Capacitance (farads): I used 22uF. Other common values for ~25v are 10uF and 47uF, but don\'t provide the right delay IMO, but that\'s up to you.
Battery Voltage: Self-explanatory. Use the nominal battery voltage. For a 4s pack, use 14.8v.
Time Constants to show: Caps are accepted to be charged/discharged in 5 time constants, but if you want to see more detail in the lower time ranges, use a lower number.
Euler\'s number: This is a constant for natural logarithm base. Leave as-is unless you really want to mess with it.

BrianG · 07:51 PM

I don't know why they don't have it already. Seems easy to do. The only thing about the arrangement I posted above is that instead of a 4s pack cutting off at 12v (3.0v/cell), it will cut off at 12.7v (3.175v/cell) for a 0.7v drop silicon diode, or 12.3v (3.075v/cell) for a 0.3v drop germanium diode. Anything lower than a 4s LVC wouldn't work well since the diode voltage drop would be too great.

The nice thing about this "circuit" is that it can be contained on a small heatshrink-wrapped PCB with in/out wires (like a UBEC) and can even add a small PCB mount potentiometer to adjust the delay at which the LVC responds.

I'd try it but I don't have a test LVC to play with.

The only other way to make sure the voltage doesn't drop under quick heavy loads is to add a bunch of low-esr caps to help with the surges. It would be larger and more expensive, not to mention the initial hook-up spark due to the large capacitance you'd have to have.