BMW "Lunchbox" speedo / tacho adapter electronicbox by Axel Joost
Informationen zu möglichen Raten
Especially for K-models with lunch box instrument!
The bread box adapter allows the connection of different newer tachos to the original tacho plug of
various BMW models that still have the old "lunch boxes" speedometer.
The adapter makes an evaluation of the input signals and puts them out on 10 pins again.
The exciter load for the charge controller is integrated. The neutral signal is inverted to match the signal for today's standard tachos.
The reserve indicator is integrated for models up to 85 years of age.
At the moment the module only runs for some tachometers and tachos.
The original speedometer signal is very weak and can not be evaluated by many speedometers.
The speed signal is "contaminated" with many disturbances and can lead to false readings.
It may therefore be that you have to install standard parts for a direct connection to the speedometer and tachometer here.
We work on it...
Dimensions: 51 mm x 51 mm x 15 mm without connector
Housing: made of plastic, cast with 2-component potting compound
Input voltage: 8 - 15 volts
Connections: Input JST 12 pin, output 0.14 mm² to the speedometer
Maximum ambient temperature: 90 degrees Celsius