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 · 06:39 PM

Quote:

Originally Posted by bdebde

Perhaps a delayed LVC is not a good idea. If it allows the batteries to drop below 3v a cell, even for a split second, it may be enough to do damage to the batteries (or at least shorten their life considerably).

Actually, if using this type of outboard circuit, the diode would increase the LVC threshold by 0.7v for silicon diodes, or 0.3v for germanium diodes. So, assuming a normal 0.7v diode, if the LVC is set for 3v/cell, it would actually activate at 12.7v for a 4s pack (3.175v/cell), 9.7v for a 3s pack (3.233v/cell), etc.

Even so, this would just prevent the LVC from reacting too quickly. Bursts usually last a couple mS, so all you need to do is average the voltage out so it doesn't dip at the LVC at quite the same speed as at the ESC. Basically, make it have around a 1/5 to 1/4 second delay.

Is it perfect? No. Then again, it is a simple and cheap alternative.