DESCRIPTION

Shift Light is an electronic device supporting the driver while driving. The colored LEDs light up when the engine reaches certain rotations set by the knobs.

This signaling makes it easier for the driver to decide whether to change gear or reduce gas.

The device is mainly used in racing vehicles, where the engines reach maximum power in the upper rpm range, however, exceeding a certain limit may result in their damage.

The device is enclosed in a compact housing, on which front there are colored light-emitting diodes, and on the back of the knob for adjusting thresholds of signaling activation. A power cord is led out from the Shift Light. The housing has two handles to facilitate installation in the vehicle.

(dimensions in milimeters)

CONNECTION

Shift Light needs three connections for proper operation - power, ground and RPM signal.

The power cable is terminated with three wires:

- white or yellow = plus 12V - the best solution is to run "after the ignition", in other words, in such a way that the device switches on when the vehicle is started.

- brown = minus, mass - from any point in the vehicle installation.

- green = rotation signal, methods of obtaining it are described below.

OBTAINING THE ROTATIONAL SIGNAL.

Shift Light controls the lighting of the LEDs based on the pulse frequency. The impulses supplied must be proportional to the engine speed. There are several ways to obtain a signal source, below are examples.

- tachometer signal - applies to the usual "pointer" tachometers on the dashboard, where the signal is delivered in the form of pulses, and the tachometer electronics controls the pointer. The green wire should then be connected in parallel to the tachometer input.

- TACHO signal from the engine control computer. Often, this signal is derived from the computer connector, you can check in the vehicle installation diagram.

- impulses from the shaft position sensor - analogously to the above, the green wire should be connected in parallel to the sensor output.

- impulses from a high voltage cable - the most popular way. In petrol engines proportional to the speed of rotation, high voltage impulses from the ignition coil appear. Just around any wire connected to the spark plug, wrap several coils of wire, insulate and connect to the Shift Light input

CONTROL

The knobs on the Shift Light housing set the engine rpm threshold at which the corresponding LED will illuminate. The regulation works in a wide range of revolutions, thanks to which the device can be used for many types of vehicles.

The regulation is recommended to be carried out at a standstill by introducing the motor into a given rotational speed, for example 4,000 RPM, it is necessary to set the knob so that the specified LED will come on and go out after the minimum speed reduction. The other thresholds for lower or higher revolutions should be set in the same way.

The knobs are marked with colors, analogous to the colors of the LEDs, i.e. the red knob has an effect on the red diode.