Modern servo's are more powerful then ever, and they draw more peak current then ever too. A battery can have a good charge, yet the voltage can dip seriously low. Voltage regulators have their limitations. There can also be excessive voltage drop in wiring, connectors and switches.
There are no "rules of thumb" that always work to select batteries or regulators. Peak amps differ substantially between servos. Voltage drop under load differs greatly with batteries that have similar ratings. Regulators typically have amperage ratings, but what are the peak servo amps, and can the supply battery keep the input voltage sufficiently above the output? Can the regulator handle fast transient load changes of your servos?
The only way to know if the voltage stays in the solid green is to check it with a high speed monitor like VoltMagic.
It is not uncommon for a pilot to be shocked at the peak low voltage after installing VoltMagic on a model that had been flying well. Typically there are no symptoms, until something finally draws the voltage down a little further.
A less obvious advantage of being warned about peak low voltage is that troubleshooting intermittent problems becomes easier when you can either rule out low voltage, or seek the cause of it and verify a repair before flying. |
Peak Low Voltage (PLV) — Captures momentary low voltages, sampling several hundred times each second.
Over Voltage (OV) — For voltage regulators.
Voltage Indication — Filtered and averaged. 16 accurate range selections. YOU select when the yellow & red LED's turn on. Four battery ranges for each battery type and four regulator ranges. 0.1 volt per LED.
Glitch and Failsafe Counting — Selectable PPM glitch or PCM failsafe counting.
Data Logger — PLV plus Glitches or Failsafes, plays back even after power off.
Application — Battery types: 4 or 5 cell Ni (NiMh or NiCd), 7.4 Li (Lithium), or 5.1 to 6.0 voltage regulators.
Connector — Universal (Futaba, JR, Z).
High Accuracy — Calibrated within 0.015 vdc.
Low Weight — 7.3 grams (1/4 OZ)
NO switches or pots to fail — All configuration is via your transmitter.
One year warranty
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