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Last Updated: November 01, 2015

Motorcycle GEAR Indicator (discrete components)

It has been a while of not having to offer my readers on some stuff that they can incorporate on their motorcycles, but I am here now. The project is made a long time ago actually but halt the progress due to limited resources available in my country. Introducing a Motorcycle Gear Indicator using discrete components and no micro controller involve. Here, the circuit is made by logical semiconductors.

CIRCUIT DESCRIPTION:


The circuit is quite simple. It uses the power of the 10 line to 3 line encoder 74ls148 and will drive a 7447 seven segment controller to display the right number of the gear. I will not explain further on how they work, datasheets are available all thru here.

74LS148 datasheet
74LS47 datasheet

Combining this two and with the help of some resistor, a 5 volts regulator, capacitors and a Seven segment display, you will have a working gear indicator for your motorcycles.

You will also be needing this for not all motorcycle is equipped with it. A universal Gear indicator sensor. Suzuki raider R150 only have three pins of that i think, neutral and top gear only plus ground and must be replaced.

The sensor common pin is just an earth ground and when a corresponding pin touches one of the input of the encoder, the circuit will then display the number of the gear.

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