Specifications: 1: Increased self test feature; 2: Use Pic16C622A microcontrollers; 3：Do not need batteries, power from the ignition; 4: Standard Futaba Plug(Black-negative Red-Positive and White-Signal); 5: Using high-brightness LED digital tube; 6: Input voltage range: 3.5V -8.4V; 7: Current consumption 25mA-60mA; 8: Mini tachometer indicates up to 30000rpm; 9: Actual RPM=Display digital *10; 10: Body size:54mm L*20mm W*16mm H 11: Window size:30mm L*15mm H 12: Weight: 19g Instructions: 1: The Y wiring tandem between in the Hall sensor and the ignition. 2: The tachometer plugs the other end with Y wire. 3: Connected to ignition power supply and can be displayed. Notes: That connecting plugs do reinforcement to prevent vibration. The hall sensor& tachometer wire leave from the ignition high-voltage wire, and receiver wires over 30cm. Connection tachometer is not recommended after the use of the flight, and best to remove the Y wire to restore the original sensor connection. If ignition has an additional tachometer pinout, it must be connected to dedicated tachometer signal wire. If there is interference from the ignition system, tachometer displays 0 or arbitrary values, this can be checked the ignition system RF. We can't guarantee that the tachometer is suitable for other types of ignition.
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