Grazie Carlo per la risposta,
ho fatto una ricerca piu' approfondita sull'oggetto che ho sottoposto alla vostra attenzione e a quanto c'e' scritto nelle specifiche , il dispositivo sembrerebbe funzionare in un range di tensione tra 4.8V e 6V.
Riporto le specifiche e il link da dove le ho prese:
4.8V-6V RC Nitro Car Truck Buggy Accelerator Fail Safe Suit | eBay
Note: The color of the item may vary slightly due to photography and your own computer
Features:
1.Low battery warning.
Prevents accidents by detection low battery voltage, low radio battery voltage, no radio signal, and signal interference.
2.Stops vehicle by applying brake servo.
Fail-Safe Break Setup
1. Connect the fail-safe unit to throttle/brake servo and receiver. Be sure to observe the polarity of the wire leads.
2. Connect to transmitter power turn on transmitter, and now you'll see FS green LED lighting, it indicates that the signal is input, servo which connect to FS will receive the signal while operating Transmitter.
3. Push the throttler make servo move to idea position, pushing FS Input signal botton, release while red LED sparking 3 times, then it indicates FS has recorded the signal.
4. Turn off transmitter power, and now you'll see FS green LED went out, while red LED is sparking, Servo is moving to the position which set before.
5. Re-urn on transmitter power, FS green LED is lighting, servo will move as transmitter moving. All set up is done, you can operate transmitter freely.
Working volts: 4.8V-6V
Loading current: 7mA(4.8V)
Precision scope: <0.3%
Dimension: approx. 37mm x 20mm x 9mm
Weight: 8g