TRI-KIT is a revision of my "concept" Gixxer Alarm system I built in Jan 2005. This design has all the features that I omitted in Gixxer Alarm (due to brevity of being a concept).

This alarm system (like the old one) is a 3 sensor system-- Two mercury switches (X and Y planes) and battery voltage monitor (tamper detection). The mercury switches detect when a person sits on, moves, lifts the bike etc.. The voltage sensor monitors when the bike is started up, or if the alarm is disconnected from the bikes battery (ie: power cable cut).

This unit knows how to dial a Nokia 51xx/61xx mobile phone via it's MBUS interface. It will ring you when the alarm is triggered. You store your number in the mobiles phonebook under the label "TRIKIT". During arment initialisation, the unit will look in the mobiles phonebook for TRIKIT and use that number to dial.

When the alarm is triggered, it will tell the mobile phone to ring the TRIKIT number (if phone is installed). Six seconds after triggering, the alarm will switch on the 120db alarm for 1 minute (This alarm is basically what you get in buildings -- yeah, it's f@&^%kin' loud).

The electrical system runs on a 8.4V, 200mA/h NI-MH battery. The logic runs at 2.8V using an Amtel MEGA8L. At 120mA/h's, the uptime of the unit (armed mode) is approximately 40 hours; more than adequate for my needs. This unit also has a power down feature that switches off unused circuitry. This feature conserves power and extends uptime.

The system has been designed to be minimally intrusive to the bikes electrical system-- only a battery connection is needed. TRI-KIT does not immobilise the bikes engine. Due to requests, it is something I will look into. However, my theory is that if you can not get to your bike quick enough to halt the theft (ie: 2 minutes), then you are screwed anyway. Most thefts in Australia involve two or three big f@%^&kers lifting the bike into a van/ute. This is now my bike got stolen in 2002, and it's the scenario I use for my design.

At the time of this writing, 3 units have been built for people (including myself). Last year, somebody tried to move my bike at Mallala Raceway. I was notified and I went to my bike with 2 big friends in tow. It was a successful test ;)